EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER
7
95-7520—02
Fig. 11. Typical Pneumatic Transducer to W7753A.
Fig. 12. Typical 4 to 20 mA Humidity and Enthalpy Sensor
to W7753A. (For note 2, refer to Fig. 8.)
24 V
A
C
24 (H)
24 (N)
24 (H)
24 (N)
INCREASE
DECREASE
24 VAC
W7753A UNIT
VENTILATOR
CONTROLLER
MMC325 PNEUMATIC
TRANSDUCER
1
2
3
MAKE SURE ALL TRANSFORMER/POWER WIRING IS AS SHOWN;
REVERSING TERMINATIONS RESULTS IN EQUIPMENT
MALFUNCTION.
OPTIONAL 24 VAC WIRING TO NEXT CONTROLLER.
USE 1/4 IN (6 MM) PNEUMATIC TUBING. MINIMUM BRANCH LINE
MUST BE 6 FT. (1.8M) OR LONGER.
31 30 29 28 27 26 25 24 23 22 21 20
24 V
AC COM
19 18 17 16
+
-
3
2
1
OUT
7
OUT
6
OUT
5
OUT
4
OUT
8
OUT
1
OUT
3
OUT
2
DI-2
DI-4
DI-1
DI-3
GROUND
PNEUMATIC
VALVE
M12693
GROUND
M
B
M
1
2
3
4
5
6
7
8
E-BUS
24 V
A
C
W7753A
UNIT
VENTILATOR
CONTROLLER
1
2
E-BUS
E GND
GND
SNSR
SETPT
LED
BYP
ASS
GND
GND
9
10 11 12
14
J3
15
31 30 29 28 27 26 25 24 23 22 21 20
24 V
AC COM
E-BUS JACK
22 VDC OUT
19 18 17 16
AI-1 OHM
AI-2 OHM
AI-4 V/mA
OUT
7
OUT
6
OUT
5
OUT
4
OUT
8
OUT
1
OUT
3
OUT
2
AI-3 V/mA
13
DI-2
DI-4
DI-1
DI-3
M12695
GND
GND
TRIAC EQUIVALENT CIRCUIT
C7600C
1
2
EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM. USE
THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM
2
) WITH
A MINIMUM OF 18 AWG (1.O MM
2
), FOR EARTH GROUND WIRE.
TO ASSURE PROPER ELECTRICAL CONTACT, WIRESMUST BE TWISTED
TOGETHER BEFORE INSERTIONINTO THE TERMINAL BLOCK.
+
S
C7600C
+
S
ENTHALPY
(4 TO 20mA)
HUMIDITY
(4 TO 20mA)
