Controller Wiring Details - Honeywell T775A Series Installation Instructions Manual

T775A/B/M SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS

Controller Wiring Details

The wiring connection terminals are shown in Fig. 7 and
are described in Table 2.
See Fig. 8 – 22 beginning on page 6 for typical T775A/B/
M wiring applications.
KNOCKOUT A
T
B
T
MOD 1
–
R
+
W
2
T
B
T
MOD 2
–
R
+
W
–
DIGITAL
+
INPUT
KNOCKOUT B
POWER
+
C
3
24 VAC
OUTPUT
NC
RELAY 4
C
NO
OUTPUT
NO
RELAY 1 C
NC
KNOCKOUT C
KNOCKOUT E
1
SENSORS A AND B USE THE TWO TT CONNECTIONS AND ARE
POLARITY INSENSITIVE.
2
FOR 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.
3 A SEPARATE EARTH GROUND IS REQUIRED FOR ANY POWER
SOURCE (24, 120, OR 240 VAC).
Fig. 7. T775A/B/M Terminal and Feature Locations.
NOTE: Refer to Table 1 on page 1 for the specific
configuration of sensors and outputs
supported by the model you are installing.
NOTE: For NEMA 4 enclosures, use waterproof fit-
tings for wiring/conduit connections at
knockouts.
Table 2. Description of Wiring
Terminal Connections.
Connection Terminal Label
Sensors
Sensor A T T
Sensor B
Outputs
Relay 1
Relay 2 NO
Relay 3 COM
Relay 4 NC
Mod 1 + - (Vdc or mA)
W R B (Series 90)
Mod 2
62-0254—13
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SENSOR A
1
SENSOR B
OUTPUT
RELAY 3
POWER
NC
120/240 VAC
C
NO
OUTPUT
NO
RELAY 2
C
NC
KNOCKOUT D
M24474
Description
Temperature Sensor;
polarity insensitive
120-240 Vac Relay
Output
Modulating Output
a
6
Table 2. Description of Wiring
Terminal Connections. (Continued)
Connection Terminal Label
Input
DI + -
24 Vac Power
24V + +
Common C
Ground
120 or 240 Vac Power
120 Vac 120
Common COM
240 Vac 240
a
For Series 90 connections, you must insert a 340 Ohm
resistor across terminals R and W. Refer to Fig. 19 on
page 9. The resistor is included with the controller.
b
A separate earth ground is required for all installations
regardless of the power source (24, 120, or 240 Vac).
Refer to Fig. 5 on page 5.
WIRING APPLICATIONS
(EXAMPLES)
Fig. 8 – 22 illustrate typical controller wiring for various
applications.
NOTE: The electronic Series 90 output provided with
modulating T775 models can not drive elec-
tro-mechanical slidewire devices like older
Series 3 modulating meters (prior to Series
6), V9055s, and S984s.
SENSOR A
L1
(HOT)
24 VAC
L2
+
C
LOAD 1
NO
COM
LOAD 2
Fig. 8. Wiring for Two-Stage Control – 24 Vac Input
and 24 Vac Load.
Description
Digital Input (dry
contact)
24 Vac Hot
24 Vac Common
b
Earth Ground
120 Vac Power
Common
240 Vac Power
T
T
NO NO
C
C
NC NC
COM
NO
M24475A