Siemens RUGGEDCOM RS900GP, Installation Manual

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RUGGEDCOM RS900GP
Installation Guide
Chapter 2
Installing the Device
Connecting the Failsafe Alarm Relay 11
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1
2
Figure 6: Chassis Ground Connection
1. Chassis Ground Connection 2. M3 Screw 3. M3 Ring Lug
Section 2.6
Connecting the Failsafe Alarm Relay
The failsafe relay can be configured to latch based on alarm conditions. The NO (Normally Open) contact is closed
when the unit is powered and there are no active alarms. If the device is not powered or if an active alarm is
configured, the relay opens the NO contact and closes the NC (Normally Closed) contact.
NOTE
Control of the failsafe relay output is configurable through ROS. One common application for this relay
is to signal an alarm if a power failure occurs. For more information, refer to the RUGGEDCOM ROS
User Guide for the RUGGEDCOM RS900GP.
The following shows the proper relay connections.
2 3 1
Figure 7: Failsafe Alarm Relay Wiring
1. Normally Open 2. Common 3. Normally Closed