Honeywell GM-1 Operation, ADisplay Panel, BReset and Silence Switches, CDIP Switch Setting

3 Operation

ADisplay Panel

A 20-segment Bargraph Display indicates the gas concentration level. The bottom LED is always lit to indicate power to the display.

The Warning LED indicates the warning level as determined by the warning setpoint has been exceeded. The Warning LED and Warning Relay operate together and never latch.

The Alarm LED indicates the alarm level as determined by the alarm setpoint has been exceeded. The Alarm LED and Alarm Relay are independently latchable or non-latchable as determined by the DIP switch on the main board. Standard factory settings are to latch the LED and not latch the relay.

The Power LED indicates power to the monitoring unit. This LED will flash during the one minute power up delay indicating that all relays are held in the normal condition to allow for sensor stabilization during power up.

The Fault LED indicates a signal input of less than

1.4mA (0.14 volts) at TP Sig. The Fault LED and Fault Relay always latch.

BReset and Silence Switches

Pushing the Reset switch will reset the fault light, fault relay, alarm light, and alarm relay. If either condition still exists, the appropriate light and relay will return to its tripped state after a time delay.

Pushing the Silence switch will silence the horn on the bottom of the Manning GM-1 until the next event occurs. The horn is triggered by a fault or an alarm condition. The horn will clear itself if the alarm and fault relay clear. A warning condition does not trigger the horn.

CDIP Switch Setting

The two position DIP switch in the center of the bottom board controls the latching of the alarm light and alarm relay. Switch 1 (left) controls the alarm relay. Switch 2 (right) controls the alarm light. Putting the switch in the on (up) position will latch the corresponding function. Putting the switch in the off (down) position will cause the corresponding function to be not latched (see Figure 3).

This allows the alarm condition to remain activated if desired even if the gas concentration goes back to below the setpoint.

Figure 3: Warning adjustment and DIP switch settings

TP	WARNING	ALARM		1 2	SW1
	TP	ADJUST
	ADJUST
GND	+20V				BOT TOP
7	TP	TP	TP	AA
	WARNING	ALARM	SIG
	WARNING		ALARM		FAULT	DRAW
	RELAY		RELAY		RELAY
						CURRENT
						TP
1	6
		+ C11		+		+

FUSE RATING 250V 1.0 AMP

SHLD GND +24 SIG

L	N	NO	C	NC	NO	C	NC	NO	C	NC
	120 VAC		WARNING			ALARM			FAULT
			RELAY*			RELAY*			RELAY*

MODEL G/M

MAINBOARD REV D

			Warning adjust pot
	0.4 - 2.0 V
	VDC		DIP switches on
			bottom of board
			Do Not Adjust!
Black		Red	Factory set pots
-		+

Risk of electrical shock.

Potential hazard.

Manning GM-1 Gas Monitoring Alarm System 19546 GM1 07/09 REVD Copyright © 2009 Honeywell Analytics. All Rights Reserved. 10