W7761A Remote Input/Output Device Owner's Manual

EXCEL 10 W7761A INPUT/OUTPUT DEVICE
27 74-2699
1
E-B
1234 5678
W7761A
REMOTE I/O
DEVICE
EARTH
GROUND
9101112 1415
31
30 2 9 28 27 26 25 24 23 22 2 1 20
GRO UND
E-BUS
E-BUS JACK
22 VDC OUT
19 18 1 7 1 6
GROUND
13
GROUND
J3
GROUND
GROUND
TRI AC EQUIVALENT CIRCUIT
AI-3 OHM
OUT 7 OUT 6
OUT5 OUT4 OUT8
OUT 1 OUT 3 OUT 2
AI-5 V/mA
DI-2 DI-4 DI-1
DI-3
AI-4 OHM
AI-6 V/ mA
AI-2 OHM
AI - 1 O H M
NOT
USED
COM
24 VAC
24VAC
EARTH G ROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM.
USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM
2
)
WITH A M INIMUM OF 18 A WG (1.O M M
2
), F OR EAR TH GROUND WIRE.
TO ASSURE PROPER ELECTRICAL CONTACT, WIRESMUST BE TWISTED
TOG ETHER BEFO RE INS ERTION INTO THE TERMINAL B LOCK.
1
2
+
-
24VAC
2
+
S
C7600C
+
S
C7400A
Enthalpy
(4 to 20mA)
Humidity
(4 to 20mA)
Fig. 17. Typical Humidity and Enthalpy (4 to 20mA) sensor wiring diagram. (For note 2, refer to Fig. 15.)