Seagate ST3320310CS - Pipeline HD 320 GB Hard Drive User's Guide download pdf (Page 143)

800-19403 - A - 11/2014

Connecting Alarm Input/Outputs A

This appendix contains the following sections:

• Before Connecting Alarm Inputs and Outputs, page 143

• Alarm Input and Output Rear Panel Connections, page 143

• Guidelines for Connecting Alarm Input Ports, page 144

• Guidelines for Connecting Alarm Output Ports, page 144

Before Connecting Alarm Inputs and Outputs

• Ensure that the alarm input mode is set to ground.

• Ensure that the signal is grounded.

• The alarm inputs require low-level voltage signals.

• The alarm input mode is set to either NC (normally closed) or NO (normally open).

• Use a relay if you are connecting two DVRs, or a DVR plus another device, to separate them.

• The alarm output port should not be directly connected to a high-power load. The load

should be less than 1 A to avoid damage.

•Use the

contactor to make the connection between the alarm output port and the load.

Alarm Input and Output Rear Panel Connections

The connections for the alarm input and output channels are described below:

Input/Output Description

1 to 16 Alarms inputs 1 to 16. The inputs becomes active with low voltage.

NO1 C1, NO2 C2,

NO3 C3

Normally open activation outputs (on/off)

Ground

1 2 ... 138 139 140 141 142 143 144 145 146 147 148 ... 151 152

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Seagate ST3320310CS - Pipeline HD 320 GB Hard Drive User's Guide Page 143