Honeywell T775abm Manual

							INSTALLATION INSTRUCTIONS
62-0254-13
T775A/B/M Series 2000 
Electronic Stand-Alone 
Controllers
PRODUCT DESCRIPTION
The T775 electronic stand-alone controllers are the next 
generation of commercial and agricultural controls 
capable of remote sensing of temperature and providing 
switched and/or proportional outputs to various types of 
loads.
Five models have analog (modulating) outputs for 
actuator and motor control, and NEMA-4 weatherproof 
enclosures are available for wet environments.
IMPORTANT
Each T775A/B/M controller is an operating 
control, not a limit or safety control. If used in 
applications requiring safety or limit controls, a 
separate safety or limit control device is 
required.
Table 1. T775A/B/M Controller Configurations.
Controller
Modela
a
All models include a digital input for use with the disable or setback option.Description ReplacesSPDT
Relay
OutputsAnalog
(Mod)
Outputs
b
b
The modulating (analog) outputs are 4-20 mA, 0-10 Vdc, 2-10 Vdc, or Series 90 selectable.Floating
Outputs
c
c
Each floating output eliminates two SPDT relays.Sensor
InputsNbr of
Sensors
Included Enclosure
T775A2009 Standard T775A1001 1 None None 1 1 NEMA 1
T775B2016 Standard N/A 2 None 1 2 1 NEMA 4X
T775B2024 Standard T775C1009   T775D1008 4 None 2 2 1 NEMA 4X
T775B2032 Standard T775A1019   T775B1000 2 None 1 2 1 NEMA 1
T775B2040 Standard T775A1027   T775A1035
T775B1018   T775B1026
T775B10424None2 21 NEMA 1
T775M2006 Modulating N/A None 2 N/A 2 1 NEMA 1
T775M2014 Modulating T775G1005   T775G1013
T775G1021   T775G103942 N/A
2
d
d
These models can support a high/low modulating limit at Sensor B for temperature control at Sensor A.1 NEMA 4X
T775M2022 Modulating N/A 2 2 N/A
2
d1 NEMA 4X
T775M2030 Modulating T775E1114   T775F1022
T775F1055   T775F108942 N/A
2
d1 NEMA 1
T775M2048 Modulating T775E1015   T775E1023
T775E1056   T775E1064
T775E109822 N/A
2
d1 NEMA 1 
						

							T775A/B/M SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS
62-0254—132
Temperature Sensorsa
The controller accepts 1,097 Ohms PTC at 77°F (25°C):
• 50021579-001 – Standard sensor (included with all 
models except NEMA 4X models)
• T775-SENS-STRAP– Strap on sensor with wiring box
• T775-SENS-WR – Water resistant with 5 foot leads 
(included with NEMA 4X models)
• T775-SENS-WT – Watertight with 6 foot lead
• T775-SENS-OAT – Outdoor air temperature sensor
• C7031B2005 – 6 inch duct mount with wiring box
• C7031D2003 – 5 inch immersion sensor with wiring 
box (use immersion well; P/N 50001774-001)
• C7031J2009 – 12 foot duct averaging sensor with 
wiring box
• C7046D1008 – 8 inch duct probe with mounting flange
• C7100D1001 – 12 inch fast response, duct averaging 
sensor with flange
• C7130B1009 – Room mount sensor
Accessories
• 107324A – Bulb Holder, duct insertion
• 107408 – Heat Conductive Compound, 4 ounce
• 50001774-001 – Immersion Well, stainless steel 304,
1/2 in. threading.
Product Changes
Below are the changes to T775A/B/M models starting with 
Series 3 (March 2009). Series 3 can be identified by the 
sideways 3 after the part number on the device label.
1.Modulating high and low limit now both function in 
either the heat or the cool mode.
2.MIN ON added.
3.SYNC added.
4.Differential and throttling range increased to 300°F.
5.Setpoint and Enable options added to the DI 
options.
6.HIDE option added to MOD1 and MOD2 (to hide 
them on the home screen).
Controller Dimensions
Fig. 1. T775A/B/M Dimensions in inches (mm).
aSee form 62-0265 - Temperature Sensors for the T775 
Series 2000 Stand-alone Controller
4 13/32 (112.1)
1/2 (12.4)
3 31/32 (101)
7 23/32
(196) 8 5/32
(207.1) 2 15/16 (74)7/8 (22.5)1 (25.5)
4 1/16 (103.4)
4 1/16 (103.4)1/64 (3.8)
2 11/16 (68.1)
7/8 (22.5)2 13/16 (71.8)
7/8 (22.5)
1 (25.5) 7/8 (22.5)
M24279
TOP
BOTTOM LEFTRIGHT
FRONT VIEW 
						

							T775A/B/M SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS
362-0254—13
BEFORE INSTALLATION
Review the “SPECIFICATIONS” on page 35 before 
installing the controller.
When Installing This Product
1.Read these instructions carefully. Failure to follow 
them could damage the product or cause a 
hazardous condition.
2.Check ratings given in instructions and on the 
product to ensure the product is suitable for your 
application.
3.Installer must be a trained, experienced service 
technician.
4.After installation is complete, check out product 
operation as provided in these instructions.
INSTALLATION AND SETUP
The following installation procedures are typically 
performed in the order listed:
1.Mounting — See “MOUNTING” below.
2.Wiring — See “WIRING” on this page.
3.Checkout — See page 11.
4.Programming — See page 14.
5.Scheduling (optional) — See page 30.
Additional topics are:
• Temperature sensor calibration begins on page 11.
• Interface overview begins on page 12.
• Setup (for advanced options) begins on page 17.
• Summary menu begins on page 34.
• Troubleshooting begins on page 34.
MOUNTING
This section describes the mounting procedures for the 
controller and temperature sensor(s).
Controller Mounting
IMPORTANT
Avoid mounting in areas where acid fumes or 
other deteriorating vapors can attack the metal 
parts of the controller circuit board, or in areas 
where escaping gas or other explosive vapors 
are present.
IMPORTANT
The controller must be mounted in a position that 
allows clearance for wiring, servicing, and 
removal.
Use a screwdriver to pry out only the knockouts that you 
will use. 
If mounting on DIN rail, be sure to remove the knockouts 
before mounting. See “Controller Wiring” on page 5 and 
Fig. 7 on page 6 for recommended knockout usage and 
locations. If you do not use an opened knockout be sure 
to cover it.
Mount the controller on any convenient interior location 
using the four mounting holes provided on the back of the 
enclosure using #6 or #8 screws (screws are not provided 
and must be obtained separately). Use controller 
dimensions in Fig. 1 on page 2 as a guide.The controller may be mounted in any orientation. 
However, mounting in the orientation shown in Fig. 1 on 
page 2 permits proper viewing of the LCD display and use 
of the keypad.
NEMA 4 Enclosure Mounting
For models with NEMA 4 enclosures, ensure that 
waterproof wire/conduit fittings are used at the knockouts 
for all wiring attachments. Refer to Fig. 7 on page 6 for 
knockout locations.
IMPORTANT
For NEMA 4 enclosures, be sure to cover and 
seal all unused open knockouts.
Temperature Sensor(s) Mounting 
and Location
Temperature sensors may be located up to 1,000 feet 
(304 m) from the T775A/B/M controller. Refer to Table 3 
on page 11 for calibration guidelines.
The sensors may be mounted on a wall or panel for 
sensing space temperature, strapped to a pipe or inserted 
in an immersion well (see Fig. 2) for hot or cold water 
sensing, or taped to a standard cap or bulb holder for duct 
air sensing. To prevent moisture or condensation entering 
the sensor through the lead wire holes, mount the sensor 
with the lead wires exiting the bottom of the sensor.
NOTES:
1. The included sensor is not designed for very 
wet applications. For immersion applications, 
an immersion well is used.
2. Heat conductive compound must be used in 
immersion wells. 
3. Refer to the list of temperature sensors on 
page 2 for this type of installation
.
Fig. 2. Sensor Inserted in Immersion Well.
NOTE: Multiple sensors may be parallel-series wired 
to sense average temperatures in large 
spaces. Refer to Fig. 3 on page 4.
WIRING
All wiring must comply with applicable electrical codes 
and ordinances, or as specified on installation wiring 
diagrams. Controller wiring is terminated to the screw 
terminal blocks located inside the device.
The remainder of this section describes the temperature 
sensor wiring and the T775A/B/M controller wiring.
SENSOR
PLACED
IN WELL
IMMERSION
WELL 1/2 NPTUSE HEAT
CONDUCTIVE
COMPOUND
M24470 
						

							T775A/B/M SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS
62-0254—134
Wiring Connections Access
To access the wiring connections, remove the two screws 
on the left side of the enclosure and gently swing open the 
top. Be careful to not stress the ribbon cables that connect 
the keypad and LCD display to the controller circuit board.
Temperature Sensor Wiring
CAUTIONElectrical Shock Hazard.
Can short equipment circuitry.
Make sure that metal tube of sensor does not 
short against T terminals in wall-mounted case.
IMPORTANT
Poor wiring practices can cause erratic readings 
from the sensor. Avoid the following to ensure 
proper operation:
• Do not route the temperature sensor wiring with 
building power wiring.
• Do not locate the temperature sensor wiring next 
to control contactors.
• Do not locate the temperature sensor wiring near 
electrical motors.
• Do not locate the temperature sensor wiring near 
welding equipment.
• Make sure good mechanical connections are 
made to both the sensor and the controller.
• Do not mount the sensor with the lead wire end 
pointing up in an area where condensation can 
occur.
If any of the above conditions cannot be avoided, 
use shielded cable.
NOTE: Each T775 controller must be wired to its own 
sensor(s). However, a benefit of the T775 
controller’s accuracy is that there is no more 
than a 2° F (-7° C) differential between any 
two T775 controllers.
Multiple Parallel Sensors
Multiple sensors can be parallel-series wired to sense 
average temperatures in large spaces. To maintain control 
accuracy, the number of sensors to be parallel-series 
wired must be of the n
2 power (for example, 4, 9, 16, etc.). 
Refer to Fig. 3
.
Fig. 3. Parallel-Series Wiring of Sensors.
Temperature Sensor Wire Type and Size
Temperature sensors use standard AWG 18/2 unshielded 
wire. For cable runs greater than 25 feet or where 
electrical interference may be a problem, shielded cable is 
recommended (See Fig. 4).
Refer to “Temperature Sensor Calibration” on page 11 for 
wire size selection where cable runs are longer than 25 
feet.
Fig. 4. Sensor Wiring — Showing Shielded Cable Connection to Sensor A.
TO T775 CONNECTIONS (SENSOR A) OR (SENSOR B).SENSORSM24471
M24472
SHIELDED
CABLE
SHIELDED
CABLE
SENSOR
SENSOR A AND SENSOR B TERMINAL WIRING IS POLARITY INSENSITIVE.1
NOTE: SHIELDED CABLE MUST BE 
            CONNECTED TO AN EARTH 
            GROUND. 
            HOWEVER,  DO NOT GROUND 
            SHIELDED CABLE AT SENSOR END.
NOTE: TO MINIMIZE NOISE PICKUP, 
  MAKE SENSOR CONNECTION FROM 
  SHIELDED CABLE AS CLOSE AS 
  POSSIBLE TO SENSOR BODY.T  
T
T  
T
SENSOR A
SENSOR B1 
						

							T775A/B/M SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS
562-0254—13
Controller Wiring
WARNINGElectrical 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.
CAUTIONDo 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.
CAUTIONA 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.
CAUTIONEquipment Damage Hazard.
Electrostatic discharge can short equipment 
circuitry.
Ensure that you are properly grounded before 
handling the unit
.
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 
controller (24 Vac or 120 Vac or 240 Vac). 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 
terminal 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 
tightening the screw.
5.Pull on each wire in all terminals to check for good 
mechanical connection
.
Fig. 6. Attaching Two or More Wires at Terminal 
Blocks.
C+W
1
2
M24296
NO HIGH VOLTAGE. CLASS 2 WIRING ONLY.
EARTH GROUND TERMINAL MUST BE CONNECTED  
TO CONDUIT CLAMP LOCALLY.1
2
1/2  (13) 1.  STRIP 1/2 IN. (13 MM) 
FROM WIRES TO 
BE ATTACHED AT 
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 
						

							T775A/B/M SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS
62-0254—136
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.
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.
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.
Fig. 8. Wiring for Two-Stage Control – 24 Vac Input 
and 24 Vac Load. Table 2. Description of Wiring
Terminal Connections.
Connection Terminal Label Description
Sensors
Sensor A T T Temperature Sensor; 
polarity insensitive
Sensor B
Outputs
Relay 1
Relay 2
Relay 3
Relay 4NO
COM
NC120-240 Vac Relay 
Output
Mod 1 + - (Vdc or mA)
W R B (Series 90)
aModulating Output
Mod 2
M24474
C NO
NCC NO
NC C NC
NOC NC
NO
T  
T
T  
T B
R
W
+ –
+ –
B
R
W
+ –
SENSOR A
SENSOR B
MOD 2 MOD 1 KNOCKOUT A
DIGITAL
INPUT
POWER 
120/240 VAC
OUTPUT
RELAY 2
KNOCKOUT D POWER
24 VAC
OUTPUT
RELAY 1
KNOCKOUT C
KNOCKOUT E
SENSORS  A AND B USE THE TWO TT CONNECTIONS AND ARE 
POLARITY INSENSITIVE.
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.
A SEPARATE EARTH GROUND IS REQUIRED FOR ANY POWER
SOURCE (24, 120, OR 240 VAC).1
21
2
OUTPUT
RELAY 3 KNOCKOUT B
OUTPUT
RELAY 4
3
3C+
120
COM
240
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. Refer to Fig. 19 on 
page 9. 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). 
Refer to Fig. 5 on page 5.Table 2. Description of Wiring
Terminal Connections. (Continued)
Connection Terminal Label Description
L1
(HOT)
L224 VAC
COM
NO COMNO
M24475A
LOAD 2
LOAD 1
SENSOR A
C NONCC NONC
T  
T 
C+ 
						

							T775A/B/M SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS
762-0254—13
Fig. 9. Wiring for Four-Stage Control – 24 Vac Input
and 24 Vac Load.
Fig. 10. Wiring for Two-Stage Control with 120 Vac 
(120 Vac Input and 120 Vac Load Shown).Fig. 11. Wiring for Two-Stage Control with 240 Vac.
Fig. 12. Wiring for Four-Stage Control with 120 Vac 
(120 Vac Input and 120 Vac Load Shown).
L1
(HOT)
L224 VAC
M24476A
SENSOR A
C NONCC NONC C NC
NOC NCNO
T  
T 
COM LOAD
4
NO
LOAD
3 LOAD
2
LOAD
1
C+
COMNO
COM
NO
COM
NO
SENSOR A
C NONCC NONC
T  
T 
COMLOAD 2
LOAD 1 NO COMNOCOM120V
M33846
C+
120
COM
240POWER SUPPLYL1  ( H O T )
L2
SENSOR A
C NONCC NONC
T  
T 
COMLOAD 2
LOAD 1 NO COMNOCOM 240V
M33847
C+
120
COM
240POWER SUPPLYL1  ( H O T )
L2
SENSOR A
C NONCC NONC
C NCNOC NCNO
T  
T 
COM120V
M33848
LOAD 1
LOAD
3
LOAD
2 COM
NO
LOAD 4
C+
120
COM
240
COMNO 
						

							T775A/B/M SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS
62-0254—138
Fig. 13. Wiring for Four-Stage Control with 240 Vac.
Fig. 14. Wiring for Floating Output (Relay 1 and Relay 
2 Pair Shown).
Fig. 15. Wiring for ML7984 Valve Actuator 
(Using 4 to 20 mA Signal)
.
Fig. 16. Wiring for Digital Input (Dry Contact).
Fig. 17. Wiring for Mod Motor or Direct Coupled 
Actuator with 4 to 20 mA Control Input
SENSOR A
C NONCC NONC
C NCNOC NCNO
T  
T 
COM 240V
M33849
LOAD 1
LOAD
3
LOAD
2 COM
NO
LOAD 4
C+
120
COM
240
COMNO
C NONCC NONC
M31361
CLOSE RELAY TO DRIVE DEVICE CLOSED. RELAY 1 SHOWN. 
(RELAYS  1 AND  3 ARE  USED  FOR  CLOSE).
CLOSE RELAY TO DRIVE DEVICE OPEN. RELAY 2 SHOWN. 
(RELAYS  2 AND  4 ARE  USED  FOR  OPEN).
THE RELAYS MUST BE WIRED IN PAIRS WITH RELAYS 1 AND 2 
BEING THE FIRST PAIR, AND RELAYS 3 AND 4 BEING THE SECOND PAIR.
12
1
2
120/240 VAC LINE
CLOSEDEVICE
COM
OPEN
NO
COM
NO COMRELAY 1RELAY 2
M27228A
MODULATING OUTPUT
TERMINAL (MOD 1)
B
R
W
+ –
B
R
W
+ –
T1 T2 B WRC
POWER
ML7984 ACTUATOR
M24482
DIGITAL
INPUT+ –
USE SEPARATE TRANSFORMER FOR T775R WHEN USING 24 VAC.1M24481A
MODULATING OUTPUT
TERMINAL (MOD 1)
B
R
W
+ –
B
R
W
+ –
POWER1
T1 T2–+
HONEYWELL MODUTROL MOTOR WITH 
4-20 mA MODULATING INPUT 
						

							T775A/B/M SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS
962-0254—13
.
Fig. 18. Wiring for Mod Motor or Direct Coupled 
Actuator with 0 to 10 Vdc Control Input
Fig. 19. Wiring for Series 90 Modutrol Motor Control.
Fig. 20. Wiring for Changeover Relay and 
Minimum Position Potentiometer Used
with Series 90 Modutrol Motors.
T1 T2 C R
POWER
USE SEPARATE TRANSFORMER FOR T775R WHEN USING 24 VAC.1 HONEYWELL MODUTROL MOTOR WITH
VOLTAGE CONTROL INPUT
1
F
M24483A
MODULATING OUTPUT
TERMINAL (MOD 1)
B
R
W
+ –
B
R
W
+ –
M24484A
TO VERIFY OUTPUT, TEST OPEN CIRCUIT VOLTAGE BETWEEN
THE MOD 1 TERMINALS W AND R.
- MINIMUM (DRIVE CLOSED) SIGNAL LESS THAN 0.17 VDC
- MAXIMUM (DRIVE OPEN) SIGNAL IS GREATER THAN 1.7 VDC
USE SEPARATE TRANSFORMER FOR T775R WHEN USING 24 VAC.
INSERT 340 OHM RESISTOR (INCLUDED) ACROSS TERMINALS R AND W.1
2
3
MODULATING
OUTPUT
TERMINAL
(MOD 1)
B
R
W
+ –
B
R
W
+ –
T1 T2 B WR
POWER
HONEYWELL ELECTRONIC
SERIES 90 MODUTROL MOTOR
1
2
3
M24485A
USE SEPAR ATE TR ANSFORMER FOR T775R WHEN USING 24 VAC.
A 250 OHM RESISTOR PROVIDES 40% AUTHORIT Y WHEN
USING A 150 OHM MINIMUM POSITION POTENTIOMETER.
INSERT 340 OHM RESISTOR (INCLUDED) ACROSS TERMINALS R AND W.1
2
MODULATING OUTPUT
TERMINAL (MOD 1)
B
R
W
+ –
B
R
W
+ –
T1 T2 B WR
POWER
2 HONEYWELL
ELECTRONIC SERIES 90
MODUTROL MOTOR
1
WRB
MINIMUM POSITION
POTENTIOMETER
(Q209)SPDT CHANGEOVER
(H205 OR H705)
3
3 
						

							T775A/B/M SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS
62-0254—1310
Fig. 21. Wiring for Three Series 90 Modutrol Motors
.
Fig. 22. Wiring for Unison Control of M9184 or M9185 Modutrol IV Motor Using One Minimum Position 
Potentiometer for All Motors.
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
USE A 1300 OHM RESISTOR FOR T WO MOTORS, 910 OHM RESISTOR FOR THREE MOTORS. 
THE 407EAU RESISTOR KIT, WHICH IS SHIPPED WITH THE M9184 AND M9185 MOTORS, 
INCLUDES BOTH RESISTORS.
INSERT 340 OHM RESISTOR (INCLUDED) ACROSS TERMINALS R AND W.1
2
1
2M9184 OR M9185
MODUTROL MOTOR
W
R
B
TRTR
W
R
B
TRTR
W
R
B
TRTR
M9184 OR M9185
MODUTROL MOTOR
M9184 OR M9185
MODUTROL MOTOR
L1
(HOT)L2
M24486
MODULATING OUTPUT
TERMINAL (MOD 1)
B
R
W
+ –
B
R
W
+ –
3
3
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
UP TO SIX SIMILAR MOTORS CAN BE CONNECTED IN UNISON.
USE RESISTOR BETWEEN R AND B ON THE MOD 1 TERMINAL: 1300 OHMS FOR TWO MOTORS; 910 OHMS FOR THREE MOTORS (4074EAU KIT).
IF COMMON TRANSFORMER IS USED, ALL MOTORS MUST BE IN PHASE. CONNECT THE SAME TRANSFORMER LEAD TO T1 ON EACH MOTOR, 
CONNECT THE OTHER TRANSFORMER LEAD TO T2 ON EACH MOTOR.
USE TEMPERATURE CONTROLLER SUCH AS H205 OR H705, OR T675A FOR CHANGEOVER CONTROL.
AUTHORITY OF MINIMUM POSITION POTENTIOMETER, IF USED, INCREASES WITH THE NUMBER OF MOTORS IN PARALLEL. WITH ONE MOTOR, 
50% STROKE; WITH TWO MOTORS, 100% STROKE; WITH THREE MOTORS, 100% STROKE WITH 1/3 OF FULL POTENTIOMETER ROTATION.
REVERSING THE B AND W TERMINALS ON ONE OR MORE MOTORS WILL NOT AFFECT CONTROL PERFORMANCE ON THE OTHER MOTORS. 
THE SYSTEM CAN BE CONFIGURED TO HAVE SOME MOTORS BE REVERSE ACTING AND OTHER MOTORS BE DIRECT ACTING.
USE SEPARATE TRANSFORMER FOR T775 WHEN POWERING FROM 24 VAC.
THE SYSTEM IS SHOWN CONNECTED FOR COOLING. FOR HEATING, REVERSE THE W AND B LEADS OF THE MODULATING OUTPUT ON THE 
T775 CONTROLLER.
1
1
2M9184 OR M9185
MODUTROL MOTOR
W
R
B
TRTR
W
R
B
TRTR
W
R
B
TRTR
M9184 OR M9185
MODUTROL MOTOR
M9184 OR M9185
MODUTROL MOTOR
L1 (HOT) L2
WRB
MINIMUM
POSITION
POTENTIOMETER
(Q209/S963)
123W
B R
CHANGEOVER
CONTROLLER
642
2
2
5
7
3
9
6
4
5
7
3
8
9M24487
MODULATING OUTPUT TERMINAL (MOD 1)
B
R
W
+ –
+ –
B
R
W
+ –
POWER
24 VAC8
C+