Wiring and Connections

3.2.4Connecting Control Relay Outputs

To connect a control relay output:

TB4:

 

RELAY OUTPUT

1. Turn OFF electrical power to the AC8.

 

 

 

 

TERMINAL BLOCKS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2. If necessary, remove a conduit knockout to

 

 

 

(BOTTOM)

 

 

permit wire entry into the AC8 enclosure.

 

 

 

 

 

 

 

 

NC

NUMBERING KEYS -

3.

Bring the wire(s) into the AC8 enclosure

 

 

NC

C

Relay 1 at left (green);

 

 

 

 

 

 

 

 

 

C

 

 

through a conduit knockout or access slot.

ONOFF

PFM8

NO

Relay 2 at right (black)

 

NO

4. Loosen the appropriate screw and slip the

ON OFF

 

 

2

 

PFM3

 

 

 

 

stripped end of the wire into the terminal

 

 

 

 

 

 

 

 

 

5.

block.

 

 

RELAY

 

 

Tighten the screw until it holds the wire

 

 

(BOTTOM)

 

 

snugly.

 

 

OUTPUTS

 

 

 

 

(TOP)

 

 

 

 

 

 

8

 

 

!

CAUTION

 

 

 

 

 

 

To reduce the risk of fire or electric shock, do not interconnect the outputs of different Class 2

 

circuits.

 

 

 

 

 

3.2.5Connecting the Emergency Power Operation (EPOP) Input

The emergency power operation, or EPOP, input connector block (TB1) is at the bottom right corner of the AC8 printed circuit board, just below the digital inputs.

To determine the proper wire size, see Table 4 - Wiring specifications.

To connect to the EPOP input:

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 into the AC8 enclosure through a conduit knockout or access slot.

4.Loosen each screw and slip the stripped end of the wire into the terminal block.

5.Tighten each screw until it holds the wire snugly.

3.2.6Setting the EPOP Jumper

ON

PF

PFM5

ON OFF

TB1

5 1

REV

(TOP)

 

 

(BOTTOM)

 

 

 

 

8

 

 

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

7

 

 

 

 

 

 

 

 

 

 

2

 

 

6

 

 

 

 

 

 

 

 

 

 

1

 

 

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TB2:

ASS

CONTACT

 

 

INPUTS

The EPOP contact input has an associated jumper to enable or disable emergency power operation (EPOP).

The AC8 comes from the factory with the EPOP jumper in the Disabled position (DIS); it may be changed to Enabled (EN).

To change the EPOP jumper setting:

1.Find the black EPOP jumper on the circuit board, as shown at right. The jumper is at the bottom right corner of the board just below the EPOP contact input (see 1.7 - Controller Board Overview).

EPOP INPUT

EPOP

P19

DIS EN

TB1: EPOP

 

 

CONTACT

 

INPUT

TB1,

INPUTS:

DRY CONTACTS ONLY.

EPOP EPOP

jumper input

2.Decide whether your configuration requires the jumper to be enabled or disabled.

3.Set the jumper as needed:

To enable EPOP, place the black jumper on the middle and right pins. The right side of the jumper is labeled EN for Enabled.

NOTE

When the EPOP jumper is set to Enabled, a Normally Closed contact must be attached or an alarm will be generated and the outputs will default to the EPOP operation setting.

To disable EPOP, place the black jumper on the middle and left pins. The left side of the jumper is labeled DIS for Disabled.

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Image 24
Emerson AC8 Connecting Control Relay Outputs, Connecting the Emergency Power Operation Epop Input, Setting the Epop Jumper