Honeywell AC-140-7, AC-220-7 manual Controller Wiring Method

WIRING

Controller Wiring

WARNING

Electrical Shock Hazard.

Can cause severe injury, death or property damage.

Disconnect power supply before beginning wiring, or making wiring connections, to prevent electrical shock or equipment damage.

CAUTION

Do not use 24 Vac power to power any external loads if 120 Vac or 240 Vac is used to power the T775A/B/M controller.

CAUTION

A separate earth ground is required. Equipment damage can result if the earth ground is not connected. See Fig. 5 and Table 2 on page 6.

CAUTION

Equipment Damage Hazard.

Electrostatic discharge can short equipment circuitry.

Ensure that you are properly grounded before handling the unit.

	1
W	C +
	2

1NO HIGH VOLTAGE. CLASS 2 WIRING ONLY.

2EARTH GROUND TERMINAL MUST BE CONNECTED TO CONDUIT CLAMP LOCALLY.

M24296

Fig. 5. Earth Ground.

IMPORTANT

Poor wiring practices can cause erratic readings from the sensor. To ensure proper operation, ensure that good mechanical connections are made to both the sensor and the controller.

IMPORTANT

When wiring the input power, only one source of power can be applied to the T775A/B/M control- ler (24 Vac or 120 Vac or 240 Vac).

T775A/B/M SERIES 2000 CONTROLLER

See Fig. 7 on page 6 for locating the appropriate power input, remote sensors input, low voltage, contact closure, and load output terminals.

Access to the terminals can be gained through standard conduit knockouts (A through E in Fig. 7 on page 6) located around the perimeter of the enclosure:

•Knockouts A and B should be used only for sensor and low-voltage wiring.

•Knockouts C, D, and E can be used to gain access to the load relay output terminals and 120/240 Vac power wiring.

Controller Wiring Method

Wire the sensors and outputs, then wire the power connection.

Each terminal can accommodate the following gauges of wire:

•Single wire – from 14 AWG to 22 AWG solid or stranded

•Multiple wires – up to two 22 AWG stranded

For 24, 120, or 240 Vac power connections:

Single wire – from 14 to 18 AWG solid or stranded

Prepare wiring for the terminal blocks, as follows:

1.Strip 1/2 in. (13 mm) insulation from the conductor.

2.Cut a single wire to 3/16 in. (5 mm). Insert the wire in the required terminal location and tighten the screw.

3.If two or more wires are being inserted into one ter- minal location, twist the wires together a minimum of three turns before inserting them to ensure proper electrical contact.

4.Cut the twisted end of the wires to 3/16 in. (5 mm) before inserting them into the terminal and tighten- ing the screw.

5.Pull on each wire in all terminals to check for good mechanical connection.

1.STRIP 1/2 IN. (13 MM)

FROM WIRES TO

BE ATTACHED AT 1/2 (13)

ONE TERMINAL.

2. TWIST WIRES TOGETHER WITH PLIERS (A MINIMUM OF THREE TURNS).

3.CUT TWISTED END OF WIRES

TO 3/16 IN. (5 MM) BEFORE INSERTING

INTO TERMINAL AND TIGHTENING SCREW.

THEN PULL ON EACH WIRE IN ALL

TERMINALS TO CHECK FOR

GOOD MECHANICAL CONNECTION.

M24473

Fig. 6. Attaching two or more wires at terminal blocks.

5 62-0254–03