Emerson AC8 3.2.2, Connecting Digital Outputs, 3.2.3Setting the Digital Output Jumpers, Table

Wiring and Connections

3.2.2	Connecting Digital Outputs		ON	PF
	To connect a digital output:				RELAY
	1. Turn OFF electrical power to the AC8.				OUTPUTS
						(BOTTOM)
	2.	If necessary, remove a conduit knockout to			(TOP)
					4	8
		permit wire entry into the AC8 enclosure.
						7
	3. Bring the wire(s) into the AC8 enclosure				3
		through a conduit knockout or access slot.			2	6
	4.	Loosen the appropriate screw and slip the	ON OFF
				PFM2	1	5
		stripped end of the wire into the terminal	ON OFF
				PFM5
		block.
				REV	(TOP)
	5. Tighten the screw until it holds the wire					(BOTTOM)
						8
		snugly.			4
	!	CAUTION			2	7
						6
					3
		To reduce the risk of fire or electric				5
		shock, do not interconnect the outputs			1
		of different Class 2 circuits.			TB2:

DIGITAL OUTPUT TERMINAL BLOCKS

NUMBERING KEYS - Note numbering begins with 1 at the bottom and proceeds up to 4 (green); and 5 up to 8 (black)

3.2.3Setting the Digital Output Jumpers

Each digital output has an associated jumper to define its operation when power is interrupted and there is no battery backup to the board. This puts the AC8 in a fail-safe mode and ensures proper functioning when the board has no power or battery backup.

The AC8 comes from the factory with all digital output jumpers in the OFF position (Normally Open). The jumper setting for each digital output can be changed to ON (Normally Closed). The settings are shown in Table 5.

Table 5	Digital output jumper settings
	Output status
Setting	(power loss & no battery backup)
OFF	Normally Open
ON	Normally Closed

To change the output jumper setting:

1.Find the respective black output jumper on the circuit board, shown in the illustration, using the following guide.

Jumper Associated output

Digital output jumpers TB4:

(BOTTOM

		NC	NC
			C
		C
ON OFF	PFM8		NO
		NO
			2
ON OFF
	PFM3

RELAY

OUTPUTS

(BOTTOM)

PFM1	Output 1
PFM2	Output 2
PFM3	Output 3
PFM4	Output 4
PFM5	Output 5
PFM6	Output 6
PFM7	Output 7
PFM8	Output 8

ON OFF	PFM2
ON OFF	PFM5

REV

(TOP)

8 4

7 3

6 2

5 1

(BOTTOM)

(TOP)

8 4

7 3

2. Decide whether your configuration requires								6
	Digital o	utpu	t	jum	pe	rs	2
the jumper to be OFF or ON.								5

3.Set the jumper as needed:

•Set the jumper to OFF by placing the black jumper on the middle and top pins.

•Set the jumper to ON by placing the black jumper on the middle and bottom pins.

15