General Purpose Outputs (GPOs)
A general purpose output (GPO) or relay is a switch that is controlled remotely. The relay is programmed in EHX to close a contact whenever a user panel’s key is pressed. When the contact is closed, it completes an electronic circuit’s signal path so that a remote device (such as a light) is powered.
A GPO can be programmed to mute a speaker, to turn on an applause light, open a door lock, or perform a variety of other functions.
The male 25-pin D-type socket labeled GP OUT on the rear of the matrix connects to eight general-purpose outputs (GPOs). The general purpose outputs are single-pole double-throw relays with contact ratings of 30 VDC (volts direct current) at 1 ampere.
Shielded cable should be used to connect GPOs.
If the GP-OUT port is used on either an HX-Omega matrix fitted with XP power supplies (part 740101Z) or an Eclipse HX-Median matrix fitted with HITRON power supplies (740134Z) the following filter must be fitted between the PROC-RCC socket and the cable:
CINCH FA-25PS/1-LF 25W D-type in-line 1000pF filter
(UK supplier: Farnell 111-4108)
This is an EMC conformance requirement only.
If the Eclipse HX-Omega / Eclipse HX-Median matrix is equipped with Power-One power supplies (720379Z), this filter should not be fitted. If this filter is already fitted to the Eclipse HX-Omega or Eclipse HX-Median and the power supplies are changed to Power-One units, the filter must be removed before the matrix is powered up.
Each general-purpose output (GPO) has a relay inside the Eclipse HX-Omega, Eclipse HX-Median or Eclipse HX-Delta matrix. When a general-purpose output is:
-
Inactive, the associated common pin on the GP OUT connector is shorted to the relevant normally closed pin.
-
Active, the short between the common pin is broken and a new connection is made between the common pin and the normally open pin.
|
DB-25M Connector |
||
|---|---|---|
|
Pin |
Description |
Relay |
|
Pin 1 |
Common |
RELAY1 |
|
Pin 2 |
Normally closed |
|
|
Pin 3 |
Normally open |
|
|
Pin 4 |
Common |
RELAY2 |
|
Pin 5 |
Normally closed |
|
|
Pin 6 |
Normally open |
|
|
Pin 7 |
Common |
RELAY3 |
|
Pin 8 |
Normally closed |
|
|
Pin 9 |
Normally open |
|
|
Pin 10 |
Common |
RELAY4 |
|
Pin 11 |
Normally closed |
|
|
Pin 12 |
Normally open |
|
|
Pin 13 |
Digital ground |
- |
|
Pin 14 |
Common |
RELAY5 |
|
Pin 15 |
Normally closed |
|
|
Pin 16 |
Normally open |
|
|
Pin 17 |
Common |
RELAY6 |
|
Pin 18 |
Normally closed |
|
|
Pin 19 |
Normally open |
|
|
Pin 20 |
Common |
RELAY7 |
|
Pin 21 |
Normally closed |
|
|
Pin 22 |
Normally open |
|
|
Pin 23 |
Common |
RELAY8
|
|
Pin 24 |
Normally closed |
|
|
Pin 25 |
Normally open |
|
| Note: | See also the Pin configuration of the GPO connector (DB-25M) below. |
| Note: | The general purpose outputs are single-pole double-throw relays with contact ratings of 30 VDC (volts direct current) at 1 ampere. |