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.
1
2
3
4
5
6
7
8
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
10
11
12
14
J3
15
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
6
9
8
5 4 3
2
1
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.)
