Table Of Contents

Cabling the CSS

Cabling the CSS 11050 and CSS 11150

CSS 11050 and CSS 11150 Rear Panel Connectors and LEDs

CSS 11050 Front Panel Connectors and LEDs

CSS 11150 Front Panel Connectors and LEDs

Cabling the CSS 11800 Modules

CSS 11800 Product Description

Switch Control Module Connectors and LEDs

Switch Control Module Connectors

Switch Control Module LEDs

Configuring a Terminal to the SCM Console Port

Fast Ethernet Module Connectors and LEDs

Fast Ethernet Module LEDs

Gigabit Ethernet Module Connectors and LEDs

Gigabit Ethernet Module LEDs

Switch Fabric Module (SFM and SFM2) Connectors and LEDs

SFM and SFM2 LEDs

Internal Disk Module LEDs

Internal Disk Module LEDs

Connecting Power Cords

Connecting a CSS 11050 or CSS 11150 Power Cord

Connecting a CSS 11050 or CSS 11150 AC Power Cord

Connecting a CSS 11150 DC Power Cord

Connecting a CSS 11800 Power Cord

Connecting a CSS 11800 AC Power Cord

Connecting a CSS 11800 DC Power Cord

Cabling the CSS

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This chapter describes the individual CSS interfaces, how to cable the CSS and its interfaces, how to attach a console for console management, and how to connect the AC or DC power cord. This chapter also describes the CSS LEDs and connectors. The information in this chapter applies to the CSS 11050, CSS 11150, and CSS 11800 except where noted.

This chapter contains the following sections:

•Cabling the CSS 11050 and CSS 11150

•Cabling the CSS 11800 Modules

•Connecting Power Cords

Cabling the CSS 11050 and CSS 11150

The CSS 11050 and CSS 11150 are fixed configuration devices designed for small Web sites or remote satellite Web sites. Each of these devices provide 5 Gbps of switch bandwidth and integrated LANports. They feature all of the networking software capabilities necessary for connecting remote Web sites to the Internet or the home Web site.

illustrates a CSS 11151with 12 auto-sensing 10/100-Mbps Ethernet (10BASE-T/100BASE-TX) interfaces.

Figure 2-1 CSS 11151 Content Services Switch

The CSS 11050 configuration supports:

•8 auto-sensing 10/100-Mbps Ethernet (10BASE-T/100BASE-TX) interfaces

•Optional integrated Gigabit Ethernet Network Interface Card (GENIC) with one uplink port

The CSS 11150 configuration supports:

•12 auto-sensing 10/100-Mbps Ethernet (10BASE-T/100BASE-TX) interfaces

•Optional integrated Gigabit Ethernet Network Interface Card (GENIC) with two GBIC ports, in either 4 MB or 8 MB per port versions

•Optional integrated Fast Ethernet Network Interface Card (FENIC) with four SC connectors for uplinks

•Optional integrated Fast Ethernet Network Interface Card (FENIC) with four additional auto-sensing 10/100-Mbps Ethernet (10BASE-T/100BASE-TX) interfaces for a total of 16 interfaces

CSS 11050 and CSS 11150 Rear Panel Connectors and LEDs

The CSS 11050 and CSS 11150 have connectors and LEDs on their front and rear panels. The rear panel has an AC connector (or DC connector on a CSS 11150), an Ethernet management RJ-45 connector, and the associated Ethernet Link/Activity, 10/100 (Mbps), and Duplex (Half or Full) LEDs, as shown in .

Figure 2-2 CSS 11050 and CSS 11150 Rear Panel Connectors and LEDs

Table 2-1 describes the LEDs on the rear panel.

Table 2-1 CSS 11050 and CSS 11150 Ethernet Management Port LED Descriptions 

LED Name	Color	State	Indicates
Link/Act	Green	Off	No link established
		On	Link established
		Blinking	Link established and activity
Duplex	Green	Off	Half duplex
		On	Full duplex
10/100	Green	Off	Port is operating at 10 Mbps
		On	Port is operating at 100 Mbps

CSS 11050 Front Panel Connectors and LEDs

All front panels of the CSS 11050 models contain connectors and LEDs that vary according to their model number. For example, the CSS 11051 in has:

•1 RS-232 Console connector (9600 baud)

•1 RS-232 Diag connector, reserved for field service use only (115,200 baud)

•8 10/100-Mbps auto-sensing Fast Ethernet connectors and their associated Link/Activity status, 10/100 (Mbps), and Duplex (Half or Full) LEDs

•Power, Status, and Ready LEDs

Figure 2-3 CSS 11051 Front Panel Connectors and LEDs

The CSS 11052 (shown in ) also has one Gigabit Ethernet connection using a Gigabit Interface Converter (GBIC), and associated Transmit, Receive, and Link LEDs. The GBIC complies with Revision 5.1 of the GBIC specification for Class 4 GBICs. The GBIC network interface complies with the IEEE 1000BASE-SX specification for short laser wavelength of 850 nm and use SC-type fiber connectors.

Figure 2-4 CSS 11052 Front Panel Connectors and LEDs

Table 2-2 CSS 11050 Front Panel LED Descriptions 

LED Name	Color	State	Indicates
Link/Act (Fast Ethernet ports)	Green	Off	No link established
		On	Link established
		Blinking	Link established and activity
Duplex (Fast Ethernet ports)	Green	Off	Half duplex
		On	Full duplex
10/100 (Fast Ethernet ports)	Green	Off	Port is operating at 10 Mbps
		On	Port is operating at 100 Mbps
Power	Green	Off	CSS does not have power
		On	CSS has power
Status	Yellow	Off	CSS is operational
		Blinking	CSS detects an error during offline or online testing, or the boot diagnostic failed and the system cannot boot
Ready	Green	Off	CSS is booting
		On	CSS is operational
		Blinking	CSS is accessing the disk
Tx (Transmit) (Gigabit port on the CSS 11052)	Green	Off	No transmit packet activity
		Blinking	Transmit activity detected
Rx (Receive) (Gigabit port on the CSS 11052)	Green	Off	No receive packet activity
		Blinking	Receive activity detected
Link/Sync (Gigabit port on the CSS 11052)	Green	Off	No link
		On	Link exists and synchronization achieved
		Blinking	Link exists but not synchronized

CSS 11150 Front Panel Connectors and LEDs

All front panels of the CSS 11150 models front panels contain connectors and LEDs that vary according to their model number. For example, the CSS 11151 front panel in has:

•1 RS-232 Console connector (9600 baud)

•1 RS-232 Diag connector, reserved for field service use only (115,200 baud)

•12 10/100-Mbps auto-sensing Fast Ethernet connectors and their associated Link/Activity status, 10/100 (Mbps), and Duplex (Half or Full) LEDs

•Power, Status, and Ready LEDs

Figure 2-5 CSS 11151 Front Panel Connectors and LEDs

The CSS 11152 (shown in ) has four additional Fast Ethernet TX connectors and their associated Link/Activity status, 10/100 (Mbps), and Duplex (Half or Full) LEDs.

Figure 2-6 CSS 11152 Front Panel Connectors and LEDs

The CSS 11153 (shown in ) has four additional Fast Ethernet 100BASE-FX SC fiber connectors and their associated Link and Activity LEDs.

Figure 2-7 CSS 11153 Front Panel Connectors and LEDs

The CSS 11154 (shown in ) has two 1000-Mbps Gigabit Ethernet connections using Gigabit Interface Converters (GBICs) and their associated Transmit, Receive, and Link LEDs. The GBICs comply with Revision 5.1 of the GBIC specification for Class 4 GBICs. The GBIC network interfaces comply with the IEEE 1000BASE-SX specification for short laser wavelength of 850 nm and use SC-type fiber connectors.

Figure 2-8 CSS 11154 Front Panel Connectors and LEDs

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Note The CSS 11155 has a similar appearance to the CSS 11154, but its memory size per port is 8 MB instead of 4 MB.

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Table 2-3 describes the LEDs on the CSS 11150.

Table 2-3 CSS 11150 Front Panel LED Descriptions 

LED Name	Color	State	Indicates
Link/Act (Fast Ethernet TX ports)	Green	Off	No link established
		On	Link established
		Blinking	Link established and activity
Duplex (Fast Ethernet TX ports)	Green	Off	Half duplex
		On	Full duplex
10/100 (Fast Ethernet TX ports)	Green	Off	Port is operating at 10 Mbps
		On	Port is operating at 100 Mbps
Power	Green	Off	CSS does not have power
		On	CSS has power
Status	Yellow	Off	CSS is operational
		Blinking	CSS detects an error during offline or online testing, or the boot diagnostic failed and the system cannot boot
Ready	Green	Off	CSS is booting
		On	CSS is operational
		Blinking	CSS is accessing the disk
Tx (Transmit) (Gigabit ports on the CSS 11154 or CSS 11155)	Green	Off	No transmit packet activity
		Blinking	Transmit activity detected
Rx (Receive) (Gigabit ports on the CSS 11154 or CSS 11155)	Green	Off	No receive packet activity
		Blinking	Receive activity detected
Link/Sync (Gigabit ports on the CSS 11154 or CSS 11155)	Green	Off	No link
		On	Link exists and synchronization achieved
		Blinking	Link exists but not synchronized
Link (Fast Ethernet FX ports on the CSS 11153)	Green	Off	No link established
		On	Link established
Act (Fast Ethernet FX ports on the CSS 11153)	Green	Blinking	Link established and activity

Cabling the CSS 11800 Modules

The CSS 11800 modules has connectors and LEDs on their front panels. The following sections describe:

•CSS 11800 Product Description

•Switch Control Module Connectors and LEDs

•Fast Ethernet Module Connectors and LEDs

•Gigabit Ethernet Module Connectors and LEDs

•Switch Fabric Module (SFM and SFM2) Connectors and LEDs

•Internal Disk Module LEDs

CSS 11800 Product Description

The CSS 11800 is a 15-slot modular switching chassis with a high speed switching fabric. The CSS 11800 offers LANconnectivity and scalable switch capacity. Designed for larger, mission-critical Web sites, the CSS 11800 provides 20 Gbps of switching bandwidth and high port density LAN ports interfaces. The CSS 11800 CSS is a Carrier Class platform with high performance and scalability and no single point of failure. In case of a disk failure, traffic is still passed in and out of the CSS.

The CSS 11800 configuration provides:

•20 Gbps of switching bandwidth (with support for an optional redundant 20-Gbps switch fabric)

•128 MB Switch Control Module (SCM), model CSS8-SCM (with support for an optional passive SCM)

•10-Gbps Switch Fabric Module 2 (SFM2), model CSS8-SFM2 (with support for an optional passive SCM2)

•Hard drive-based Internal Disk Module (IDM), model CSS8-IDM-MEM-HD, for logging and off-line system files

•Eight slots configurable with either:

–Fast Ethernet modules providing eight auto-sensing 10/100-Mbps Ethernet (10BASE-T/100BASE-TX) RJ-45 ports or six 10BASE-T/100BASE-TX ports and two 100BASE-FX ports

–Gigabit Ethernet modules providing up to four 1000-Mbps Ethernet (1000BASE-SX) Gigabit Interface Converter (GBIC) interfaces with either 8 megabytes of flow connection memory supporting up to 64,000 simultaneous flows or 16 megabytes of flow connection memory supporting up to 128,000 simultaneous flows

•Optional flash-based Internal Disk Module (IDM), model CSS8-IDM-MEM-HD, in place of the hard drive-based IDM

illustrates a CSS 11800.

Figure 2-9 CSS 11800 Content Services Switch

Switch Control Module Connectors and LEDs

The Switch Control Module (SCM) provides master control and packet memory storage and is responsible for the following functions:

•System powerup and boot control

•Centralized routing table management

•System-wide connection management

•Interface to external Network Management Station

•Disk management (internal disk module)

•Provides two external RS-232 interfaces

•Building Integrated Timing Service support

While only one SCM is required in a configuration, you can install and configure a passive SCM for redundancy. A maximum of two SCMs are allowed in a chassis.

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Note The SCM contains a small lithium battery. Some jurisdictions restrict the ways in which items containing lithium batteries may be disposed. In particular, lithium batteries or products containing lithium batteries may never be disposed of in an unregulated fire. Other restrictions might apply. Refer to Appendix A, Specifications for lithium battery disposal warnings.

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Warning Ultimate disposal of the lithium battery should be handled according to all national laws and regulations.

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Switch Control Module Connectors

The Switch Control Module (model CSS8-SCM) contains the following connectors and LEDs:

•1 RJ-45 10/100-Mbps Fast Ethernet management connector

•1 RJ-45 RS-232 Console connector

•1 RJ-45 RS-232 Diag connector (reserved for field service diagnostic use only)

•1 RJ-45 Building Integrated Timing Supply (BITS) Clock RS-422 connector

•Power, Status, and Active module LEDs

•Duplex, 10/100, and Active LEDs for the Fast Ethernet port

•Power Supply 1 and 2 LEDs

illustrates the SCM front panel connectors and LEDs.

Figure 2-10 Switch Control Module Connectors and LEDs

Switch Control Module LEDs

The SCM front panel LEDs indicate module and configuration status. Table 2-4 describes the SCM LEDs and their indications.

Table 2-4 Switch Control Module LED Descriptions 

LED Name	Color	LED Status	Indicates
Power	Green	Off	Module does not have power
		On	Module has power
Status	Yellow	Off	Module is operational
		On	Module is experiencing an error (only when the SCM is active; the LED is normally yellow when the SCM is passive)
Active	Green	Off	SCM is passive
		On	SCM is active
Duplex (Ethernet Management Port)	Green	Off	Port is operating at half duplex
		On	Port is operating at full duplex
10/100 (Ethernet Management Port)	Green	Off	Port is operating at 10 Mbps
		On	Port is operating at 100 Mbps
Link (Ethernet Management Port)	Green	Off	No link
		On	Link established
		Blinking	Link established and constant activity
PS 1 (Power Supply 1)	Green	Off	Power supply is not functioning
		On	Power supply is functioning
PS 2 (Power Supply 2)	Green	Off	Power supply is not functioning
		On	Power supply is functioning

Configuring a Terminal to the SCM Console Port

This section describes how to configure a terminal connected to the SCM console port. Initially, the terminal settings must match the CSS default settings as specified in Table 2-5.

Table 2-5 CSS Console Port Default Settings

Parameter	Default Setting
Baud Rate	9600
Data Bits	8
Flow Control	none
Parity	none
Stop Bits	1
Terminal Type	VT100/ANSI

Fast Ethernet Module Connectors and LEDs

The FEM is available in two models:

•Model CSS8-IOM-8FE contains 8 RJ-45 Fast Ethernet auto-sensing 10/100-Mbps 10BASE-T/100BASE-TX connectors

•Model CSS8-IOM-6/2FE contains 6 RJ-45 Fast Ethernet auto-sensing 10/100-Mbps 10BASE-T/100BASE-TX connectors and 2 100BASE-FX SC fiber connectors

Each model contains Power, Status, and Ready LEDs for module status and Duplex, Speed, and Link LEDs for each of the 8 connectors. illustrates the LEDs and connectors on the 8-port FEM.

Figure 2-11 8-Port Fast Ethernet Module Connectors and LEDs

illustrates the LEDs and connectors on the FEM model CSS8-IOM-6/2/FE.

Figure 2-12 Fast Ethernet Module with 6 10BASE-T/100BASE-TX Connectors, Two 100BASE-FX SC Fiber Connectors, and LEDs

Fast Ethernet Module LEDs

The FEM front panel LEDs indicate module and network status. Table 2-6 describes the FEM LEDs.

Table 2-6 Fast Ethernet Module LED Descriptions 

LED Name	Color	LED Status	Indicates
Power	Green	Off	Module does not have power
		On	Module has power
Status	Yellow	Off	Module is operational
		On	Module is experiencing an error
Ready	Green	Off	Module not initialized
		On	Module initialized and ready
Duplex (FES Ports 1 to 8)	Green	Off	Port is operating at half duplex
		On	Port is operating at full duplex
10/100 (FES Ports 1 to 8)	Green	Off	Port is operating at 10 Mbps
		On	Port is operating at 100 Mbps
Link (FES Ports 1 to 8)	Green	Off	No link established
		On	Link established
		Blinking	Link established and activity detected

Gigabit Ethernet Module Connectors and LEDs

The GEM is available in two models:

•Model CSS8-IOM-4GE/8 contains four Gigabit Interface Converter (GBIC) slots and 8 MB Flow Cache SRAM memory supporting up to 64,000 simultaneous flows. CSS8-GBIC-SX is sold separately.

•Model CSS8-IOM-4GE/16 contains four GBIC slots and 16 MB Flow Cache SRAM memory supporting up to 128,000 simultaneous flows. CSS8-GBIC-SX is sold separately.

illustrates the LEDs and connectors on a GEM.

Figure 2-13 Gigabit Ethernet Module Connectors and LEDs

Gigabit Ethernet Module LEDs

The GEM front panel LEDs indicate module status (Power, Status, and Ready LEDs) and network status for each of the connectors (Transmit, Receive, and Link LEDs). Table 2-7 describes the GEM LEDs.

Table 2-7 Gigabit Ethernet Module LED Descriptions 

LED Name	Color	LED Status	Indicates
Power	Green	Off	Module does not have power
		On	Module has power
Status	Yellow	Off	Module is operational
		On	Module is experiencing an error
Ready	Green	Off	Module not initialized
		On	Module initialized and ready
Tx (Transmit) (Ports 1 to 4)	Green	Off	No transmit packet activity
		Blinking	Transmit activity detected
Rx (Receive) (Ports 1 to 4)	Green	Off	No receive packet activity
		Blinking	Receive activity detected
Link/Sync (Ports 1 to 4)	Green	Off	No link
		On	Link exists and synchronization achieved
		Blinking	Link exists but not synchronized

Switch Fabric Module (SFM and SFM2) Connectors and LEDs

The Switch Fabric Module (SFM or SFM2) sets up and tears down flow connections, monitors switch operation, and performs switch functions. The I/O modules use the SFM processors to perform routing functions, including resolution of unknown addresses, route determinations, protocol processing, and other exception events.

Each module provides 10-Gbps switch control element for switching functionality and flow processing for four I/O modules. You can install a second active module to service four additional I/O modules. Both active modules are on simultaneously in the CSS 11800. The chassis enables you to configure two additional passive modules for redundancy. Therefore, you can configure a total of four SFMs or SFM2s in a chassis, of which only two would be active at any time.

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Note When the CSS 11800 contains two passive SFMs and an active SFM switchover occurs, both passive SFMs switchover to become active SFMs.

You can mix SFMs with SFM2s in the same CSS 11800 chassis. However, you must use the same type module as the active SFM and as the passive SFM.

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The Switch Fabric Module (SFM and SFM2) contains Power, Status, and Active LEDs. The SFM has four RJ-45 RS-232 Console and Diag connectors (all of these connectors are reserved for field service diagnostic use only).

illustrates the SFM front panel LEDs and connectors.

Figure 2-14 Switch Fabric Module Connectors and LEDs

The SFM2 contains two RJ-45 RS-232 Diag1 and Diag 2 connectors, combining both Console and Diag functions on each connector (all of these connectors are reserved for field service diagnostic use only).

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Note These connectors are for serial data only and are not compatible with Ethernet RJ-45 cable connectors.

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illustrates the SFM2 (model CSS8-SFM2) front panel LEDs and connectors.

Figure 2-15 Switch Fabric Module 2 Connectors and LEDs

SFM and SFM2 LEDs

The SFM and SFM2 front panel LEDs indicate operating and configuration status. Table 2-8 describes the SFM LEDs.

Table 2-8 Switch Fabric Module LED Descriptions

LED Name	Color	LED Status	Indicates
Power	Green	Off	Module does not have power
		On	Module has power
Status	Yellow	Off	Module is operational
		On	Module is experiencing an error (only when the SFM is active; the LED is normally yellow when the SFM is passive)
Active	Green	Off	SFM is passive
		On	SFM is active

Internal Disk Module LEDs

The Internal Disk Module (IDM) in slot 15 contains Power, Status, and Active LEDs. illustrates the IDM front panel LEDs. The LEDs apply to both the flash-based (model CSS8-IDM-MEM-FD) or hard drive-based (model CSS8-IDM-MEM-HD) IDM.

Figure 2-16 Internal Disk Module LEDs

Internal Disk Module LEDs

The CSS 11800 IDM front panel LEDs indicate operating and activity status. Table 2-9 describes the IDM LEDs.

Table 2-9 CSS 11800 Internal Disk Module LED Descriptions

LED Name	Color	LED Status	Indicates
Power	Green	Off	IDM does not have power
		On	IDM has power
Status	Green	Off	IDM device 0 is selected
		On	Reserved for future use
Active	Green	Off	No activity
		On	Constant activity
		Blinking	Activity

Connecting Power Cords

The CSS 11050 models are powered by an AC power supply. The CSS 11150 and CSS 11800 are powered by either an AC or DC power supply. Before you install the AC or DC power cord, ensure that you have read Appendix A, Specifications for electrical specifications. The following sections describe:

•Connecting a CSS 11050 or CSS 11150 Power Cord

•Connecting a CSS 11800 Power Cord

Connecting a CSS 11050 or CSS 11150 Power Cord

The following sections provide information on:

•Connecting a CSS 11050 or CSS 11150 AC Power Cord

•Connecting a CSS 11150 DC Power Cord

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Note The CSS 11050 is only available in an AC version.

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Connecting a CSS 11050 or CSS 11150 AC Power Cord

To connect an AC power cord to a CSS 11050 or CSS 11150:

1. Ensure that the CSS power switch is in the 0 (off) position.

2. Attach the power cord to the CSS by plugging the AC power cord connector into the power receptacle at the rear panel, as shown in .

Figure 2-17 Connecting a CSS 11050 or CSS 11150 AC Power Cord

3. Plug the power cord into a dedicated 3-wire grounding receptacle.

4. Switch on the power on the CSS.

Connecting a CSS 11150 DC Power Cord

Before you install a DC power cord, refer to Appendix A, Specifications for DC power supply safety warnings.

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Warning The DC power supply cord requires 18 AWG wire. The CSS 11150 draws a maximum of 25 amps.

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Warning DC systems do not have a power switch. A chassis configured for DC power requires an external power disconnect device (such as an external circuit breaker).

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Warning Before performing the DC installation procedure, ensure that power is removed from the DC circuit. To ensure that all power is off, locate the circuit breaker that services the DC circuit and switch it off.

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To connect the CSS 11150 DC power supply to a power source:

1. Locate the DC terminal block on the front of the chassis as shown in
.

Figure 2-18 Location of CSS 11150 DC Power Supply Connectors

2. Using a flat-head screwdriver, loosen the captive screws on the three DC connectors (labeled from left to right, +, -, and, respectively).

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Warning Before installing a wire, ensure that the polarity of the DC connections is correct. Reversed polarity causes damage to the DC power supply and can create a dangerous shock hazard.

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3. Install the wires into the appropriate connector. Make sure that the uninsulated part of each wire is 9mm (0.35 in.) in length.

When installing the wires, always connect the ground wire first. When disconnecting the wires, always disconnect the ground wire last.

The proper power cable wiring between the CSS 11150 and DC power source is illustrated in Table 2-10.

Table 2-10 CSS 11150 to DC Power Source Cabling

CSS 11150	DC Power Source
(Ground)	(Ground)
+	+
-	-

4. Tighten the captive screws to 5 to 7 inch-pounds (.6 to .8 Nm) of torque to secure the wires in the connectors. Ensure the wires are held firmly in place.

Connecting a CSS 11800 Power Cord

The following sections provide information for connecting an AC or DC power cord to a CSS 11800.

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Note For information on installing a redundant AC or DC power supply, consult the reference sheet included with the power supply.

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Connecting a CSS 11800 AC Power Cord

To connect an AC power cord to a CSS 11800:

1. Ensure that the CSS power switch is in the 0 (off) position.

2. Attach the power cord to the CSS by plugging the AC power cord connector into the power receptacle at the front of the chassis as shown in .

Figure 2-19 Connecting a CSS 11800 AC Power Cord

3. Plug the power cord into a dedicated 3-wire grounding receptacle.

4. Switch on the power on the CSS.

Connecting a CSS 11800 DC Power Cord

Before you install a DC power cord, refer to Appendix A, Specifications for DC power supply safety warnings.

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Warning The DC power supply cord requires 12 AWG wire. The CSS 11800 draws a maximum of 25 amps.

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Warning DC systems do not have a power switch. A chassis configured for DC power requires an external power disconnect device (such as an external circuit breaker).

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Warning Before performing the DC installation procedure, ensure that power is removed from the DC circuit. To ensure that all power is off, locate the circuit breaker that services the DC circuit and switch it off.

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To connect the CSS 11800 DC power supply to a power source:

1. Locate the DC terminal block on the front of the chassis as shown in
.

Figure 2-20 Location of CSS 11800 DC Power Supply Connectors

2. Using a flat-head screwdriver, loosen the captive screws on the three DC connectors (labeled from left to right, +, -, and, respectively).

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Warning Before installing a wire, ensure that the polarity of the DC connections is correct. Reversed polarity can cause damage to the DC power supply and can create a dangerous shock hazard.

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3. Install the wires into the appropriate connector. Make sure that the uninsulated part of each wire is 9mm (0.35 in.) in length.

When installing the wires, always connect the ground wire first. When disconnecting the wires, always disconnect the ground wire last.

The proper power cable wiring between the CSS 11800 and DC power source is illustrated in Table 2-11.

Table 2-11 CSS 11800 to DC Power Source Cabling

CSS 11800	DC Power Source
(Ground)	(Ground)
+	+
-	-

4. Tighten the captive screws to 5 to 7 inch-pounds (.6 to .8 Nm) of torque to secure the wires in the connectors. Ensure the wires are held firmly in place.