User's Manual

4. Commissioning
7.Manual ION-U_EU_L_23_23 M0F200AFA.docx Page 49
4.4. External Alarm Inputs
With the external alarm inputs, it is possible to monitor the status of connected
devices, e.g. a UPS, via software. All alarm inputs are normally high (5 V) without
connection. The polarity (high/ low) can be set via the software at the Master Unit (for
details please see the appropriate ION-U software manual).
The device to be monitored must be connected so that the alarm contacts will be
closed in case of an alarm (I max = 8 mA). The alarm inputs are potential-free with
common ground (earth).
Subminiature circular connectors series 712 with five contacts, which are contained
in the alarm kit, can be ordered directly from the Binder Connector Group, the
manufacturer, or indirectly from CommScope.
4.5. Troubleshooting
The status of the Extension Unit can be checked via the master unit (for details
please refer to the ION-U software manual). Locally, the status can be checked at the
LED, see chapter 4.3.2.