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EXCEL 10 W7761A INPUT/OUTPUT DEVICE
26 74-2699
GROUND 5 Analog ground
AI-1 4 Analog Input 1 resistance
3 Not Used
2 Not Used
EGND 1 Earth Ground
See Fig. 20 to wire a pneumatic transducer to a W7761A.
12345678
E-BUS
24 VAC
W7761A
REMOTE I/O
DEVICE
1
2
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, WIRES MUST BE TWISTED
TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.
E-BUS
E GND
GND
GND
GND
NOT USED
NOT USED
AI-1 OHM
AI-2 OHM
9 101112 14 J315
31 30 29 28 27 26 25 24 23 22 21 20
24 VAC COM
E-BUS
JACK
22 VDC OUT
19 18 17 16
AI-3 OHM
AI-4 OHM
AI-6 V/mA
OUT 7
OUT 6
OUT 5
OUT 4
OUT 8
OUT 1
OUT 3
OUT 2
AI-5 V/mA
13
DI-2
DI-4
DI-1
DI-3
M15276
GND
GND
TRIAC EQUIVALENT CIRCUIT
24 VAC
+
-
2
JACK FOR
E-BUS
NETWORK
ACCESS
7 69 8 54321
T7770A
WALL
MODULE
GND
SENSOR
E-BUS
E-BUS
C7770A AIR
TEMPERATURE SENSOR
Fig. 16. Typical T7770A and C7770A wiring diagram. (For note 2, refer to Fig. 15.)