Siemens RUGGEDCOM M969, Installation Manual

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RUGGEDCOM M969
Installation Guide
Chapter 2
Installing the Device
Connecting the Failsafe Alarm Relay 13
Section 2.3
Connecting the Failsafe Alarm Relay
The Failsafe output relay is provided to signal critical error conditions that may occur on the RUGGEDCOM M969
series switches. The contacts are energized upon power up of the unit and remain energized until a critical error
occurs.
One common application for this output is to signal an alarm if a power failure or removal of control power
occurs.
The proper relay connections are as follows:
2
1
4
3
Figure 11: Failsafe Alarm Relay Wiring
Pin Description
1 Normally Closed
2 Common
3 Normally Open
Section 2.4
Connecting to the Device
The following describes the various methods for accessing the ROS console and Web interfaces on the device. For
more detailed instructions, refer to the ROS User Guide for the RUGGEDCOM M969.
RS-232 Console Port
Connect a PC or terminal directly to the RS-232 console port to access the boot-time control and ROS interfaces.
The console port provides access to ROS's console and Web interfaces.
IMPORTANT!
The console port is intended to be used only as a temporary connection during initial configuration or
troubleshooting.
Connection to the console port is made using an M12-to-DB9 console cable. The following is the pin-out for the
console port: