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LB308A
Chapter 3: Installation
Ethernet Extender Switch.
1
2
5
3
4
Figure 2-3. Power connectors on the switch.
3.3.3 Alarms for Power Failure
Step 1: There are two pins on the terminal block used to detect a power failure.
The output is normally closed when the power source is active. Use this as a dry-
contact application to send a signal that detects a power failure.
Table 3-1. Power input assignment.
Number Input Polarity Voltage Connector
1 Power 3 12 VDC DC jack
2 Power 2
+ 12–48 VDC
Terminal block
- Power Ground
3 Power 1
+ 12–48 VDC
- Power Ground
4 Earth Ground
5 Relay output rating 1 A @24 VDC