Advanced Global Technology QSP-660 High Current/Voltage Alarm Output, Open, Alarm Connector Pins

In some installations, the alarm output is$GYDQFHGused to activate7HFKQRORJ\or deactivate9LGHR￿,QFhigh￿voltage and/or high current circuitry (110 VAC lights, siren, etc.) which cannot be controlled directly by the QSP-660.

The easiest method to address the above cases is to use a relay, which has the number and rating on its contacts sufficient for the alarm output. Shown below are two methods to control a high current or high voltage device using a relay with a single, normally open contact. An internal, current limiting resistor for the pin 9 +5V supply will limit the usable relay current to something less than 10 mA (depending on the coil impedance). If a higher voltage or higher current relay is used, an external supply is required. Under these conditions the open circuit voltage (no alarm) on pin 9 must not exceed 30 VDC and the closed circuit current (alarm active) into pin 9 must be less than 50 mA.

The breakout adapter board is numbered compatibly with the DB-15 connector so the following table is applicable to either.

Note: Pin 16 is only present on the Breakout Adapter and is connected to chassis ground.

High Current/Voltage Alarm Output

To be used when output current exceeds 50 mA or when, non-alarm voltage exceeds 30 VDC. Voltage/Current limited by contacts of the relay being used.

1

	CLOSED = Alarm activated
9	OPEN	= No alarm
	-
	5 VDC Relay
	Less than 10 mA
16	+
1
	CLOSED = No alarm
	OPEN		= Alarm activated
9	Vout
	CLOSED = Alarm activated
	OPEN		= No alarm
	Vout	Relay
16	+30 VDC, 50 mA max.

ALARM CONNECTOR PINS

1	Alarm1	9	Alarm Out (< 50 mA)
2	Alarm2	10	Freeze/Master Enable
3	Alarm3	11	(reserved for future use)
4	Alarm4	12	(reserved for future use)
5	NA	13	+5V ( < 10 mA)
6	NA	14	(reserved for future use)
7	NA	15	Signal ground (< 10 mA)
8	NA	16	Chassis ground

QSP-660: Instructions for Basic Operation and Installation Page 19