Connecting The Failsafe Relay; Installing The Fan Tray Cables - Siemens RUGGEDCOM MX5000RE Installation Manual

Chapter 2
Installing the Device
NOTE
The other end of the grounding cable will be connected to the inside of the enclosure in later
steps.
Section 2.1.3

Connecting the Failsafe Relay

The failsafe relay on the Control Module (CM) 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.
Figure 8: Failsafe Alarm Relay Wiring
1. Normally Open 2. Common (Ground)
The failsafe relay terminal is connected to the patch panel for the CM using the cable assembly provided. The
connector is an Amphenol MIL-DTL 38999 size 13, code A. The following is the pinout for the connector:
Figure 9: Failsafe Relay Alarm Panel Connector
Section 2.1.4

Installing the Fan Tray Cables

1. Apply Loctite® 222 to the threads of the fan tray cable connector threads.
12
1 2 3
3. Normally Closed
Pin
NC
Common
NO
Pin
A
B
C
D
RUGGEDCOM MX5000RE
Installation Guide
Function
Normally Closed
Ground
Normally Open
Description
COM (Common)
NO (Normally Open)
NC (Normally Closed)
Spare
Connecting the Failsafe Relay