Platinum™ IP3
Installation and Operation Manual
Alarm Expansion Module (PX-ALARM)
© 2016 Imagine Communications Corp.
Proprietary and Confidential.
September 2016 | Page 63
General Purpose Interface (GPI)
GPI connections to the PX-ALARM module are via a Micro DB25 connector on the front card edge of the
PCB. The GPI Inputs are non-isolated inputs. A contact closure to ground asserts/triggers the GPI Input.
Figure 21:
GPI Inputs
A 1k Ohm series resistor and clamping diode are connected to each Input, to protect the Input from over
voltage.
The GPI Outputs are electrically isolated using a Relay with 3 contacts. Access to all 3 contacts of the
relay have been provided to allow for defining the preferred method of signaling critical faults.
Table 18:
GPI Output Descriptions
NC
Normally closed; contact shorted with common when alarm condition exists or
frame not powered.
NO
Normally open; contact shorted with common when alarm does not exist and
frame is powered
COMMON
Reed (Return of the Relay)
NO
COM
NC
CONTROL
PX-ALARM
Figure 22:
GPI Outputs
Figure 23:
Micro DSUB connector pin numbering
