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3.2.2
Connecting Digital Outputs
To connect a digital output:
1. Turn OFF electrical power to the AC8.
2. If necessary, remove a conduit knockout to
permit wire entry into the AC8 enclosure.
3. Bring the wire(s) into the AC8 enclosure
through a conduit knockout or access slot.
4. Loosen the appropriate screw and slip the
stripped end of the wire into the terminal
block.
5. Tighten the screw until it holds the wire
snugly.
CAUTION
!
To reduce the risk of fire or electric
shock, do not interconnect the outputs
of different Class 2 circuits.
3.2.3
Setting 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
Setting
(power loss & no battery backup)
OFF
ON
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
PFM1
PFM2
PFM3
PFM4
PFM5
PFM6
PFM7
PFM8
2. Decide whether your configuration requires
the jumper to be OFF or ON.
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.
Output status
Normally Open
Normally Closed
Associated output
Output 1
Output 2
Output 3
Output 4
Output 5
Output 6
Output 7
Output 8
RELAY
OUTPUTS
(TOP)
4
3
2
1
(TOP)
4
3
2
1
TB2:
Digital output jumpers
Digital output jumpers
15
Wiring and Connections
DIGITAL OUTPUT
TERMINAL BLOCKS
(BOTTOM)
8
7
NUMBERING KEYS -
6
Note numbering begins
with 1 at the bottom and
5
proceeds up to 4 (green);
and 5 up to 8 (black)
(BOTTOM)
8
7
6
5
TB4:
(BOTTOM
NC
NC
C
C
NO
NO
2
RELAY
OUTPUTS
(BOTTOM)
(TOP)
8
4
7
3
6
2
5
1
(BOTTOM)
(TOP)
8
4
7
3
6
2
5
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