Sierra Monitor Corporation 5100-04-IT, T12020, 5100-06-IT, 5100-05-IT, 5100-03-IT Page, PCB Label

6.Carefully return the transmitter to the enclosure installing it over the two stand-off’s. Tighten the retaining screws into the stand-offs.

P1	PCB Label		Function
1	Switch	IN +	Digital Input SW +
2		IN -	Digital Input SW -
3	4-20	IN +	4-20 mA Input +
4		IN -	4-20 mA Input -
5	GND		Ground
6	4-20	OUT +	4-20 mA Output +
7		OUT -	4-20 mA Output -

P2	PCB Label		Function
1	RS 485	+	RS 485 (+) (A)
2		-	RS 485 (-) (B)
3		S	RS 485 shield (Isolated GND)
4	RS 485	+	RS 485 (+) (A)
5		-	RS 485 (-) (B)
6		S	RS 485 shield (Isolated GND)

P3B	PCB Label	Function
1	P	Power
2	S	Signal
3	G	Ground
P3A

4

5

6

P	Power
S	Signal
G	Ground

P4 Connections are only available when the optional Relays are included

P4	PCB Label			Function
1	LO ALM	N/C	Low	Alarm Relay NC
2		COM	Low Alarm Relay COM
3		N/O	Low Alarm Relay NO
4	HI ALM	N/C	High Alarm Relay NC
5		COM	High Alarm Relay COM
6		N/O	High Alarm Relay NO
7	TRBL	N/C	Trouble Alarm Relay NC *
8		COM	Trouble Alarm Relay COM*
9	ALM	N/O	Trouble Alarm Relay NO*

*Trouble relay is fail safe so it is energized for normal operation, functions are labeled for normal operation.

Table 3-1

Sensor Module External Interfaces (See Figure 3-2)

7. Establish the module address according to section 3.5.

NOTE

The starting delay period normally takes approximately 3 minutes but under some

circumstances can take longer.

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