Honeywell AC-220-7, AC-140-7 Wiring Applications Examples, Controller Wiring Details, Outputs

T775A/B/M SERIES 2000 CONTROLLER

Controller Wiring Details

The wiring connection terminals are shown in Fig. 7 and are described in Table 2.

See Fig. 8 – Fig. 20 beginning on page 6 for typical T775A/B/M wiring applications.

KNOCKOUT A
		B	T			SENSOR A
	MOD 1		T
		R –				1
	2	W +	T
						SENSOR B
		B
	MOD 2		T
		R –
		W +
	DIGITAL	–
		+
	INPUT
KNOCKOUT B
3	POWER	C +
	24 VAC					OUTPUT
						RELAY 3
	OUTPUT	NC	NC			POWER
	RELAY 4			120	COM 240	120/240 VAC
		C	C
		NO	NO
	OUTPUT	NO		NO		OUTPUT
						RELAY 2
	RELAY 1	C		C
		NC		NC
KNOCKOUT C						KNOCKOUT D

KNOCKOUT E

1SENSORS A AND B USE THE TWO TT CONNECTIONS AND ARE POLARITY INSENSITIVE.

2FOR MOD 1 AND MOD 2 CURRENT (mA) OR VOLTAGE (VDC) OUTPUT, USE SIGNAL (+) & COMMON (-).

FOR MOD 1 AND MOD 2 SERIES 90 OUTPUT, USE W, R, & B.

3A SEPARATE EARTH GROUND IS REQUIRED FOR ANY POWER

SOURCE (24, 120, OR 240 VAC). M24474

WIRING APPLICATIONS (EXAMPLES)

Table 2. Description of Wiring

Terminal Connections. (Continued)

Connection	Terminal Label	Description
	Input
DI	+ -	Digital Input (dry
		contact)
	24 Vac Power
24V +	+	24 Vac Hot
Common	C	24 Vac Common
Ground		Earth Ground	b
	120 or 240 Vac Power
120 Vac	120	120 Vac Power
Common	COM	Common
240 Vac	240	240 Vac Power

aFor Series 90 connections, you must insert a 340 Ohm resistor across terminals R and W. See Fig. 17 on page 8. The resistor is included with the controller.

bA separate earth ground is required for all installations regardless of the power source (24, 120, or 240 Vac). See Fig. 5 on page 5.

WIRING APPLICATIONS (EXAMPLES)

Fig. 8 – 20 illustrate typical controller wiring for various applications.

SENSOR A

T

T

Fig. 7. T775A/B/M terminal and feature locations.

NOTE: Refer to Table 1 on page 1 for the specific con- figuration of sensors and outputs supported by the model you are installing.

NOTE: For NEMA 4 enclosures, use waterproof fittings for wiring/conduit connections at knockouts.

Table 2. Description of Wiring

Terminal Connections.

L1

(HOT)

L2

24 VAC

LOAD 1

LOAD 2

	C +
NO	NO
COM
	C
	NC

NO

C

NC

Connection	Terminal Label	Description
	Sensors
Sensor A	T T	Temperature Sensor;
Sensor B		polarity insensitive
	Outputs
Relay 1
Relay 2	NO	120-240 Vac Relay
Relay 3	COM	Output
Relay 4	NC
Mod 1	+ - (Vdc or mA)	Modulating Output
Mod 2	W R B (Series 90)a

COM

NO

M24475A

Fig. 8. Wiring for two-stage control – 24 Vac input and

24 Vac load.

62-0254–03 6