TTL Output Module
Cat. No. 1771OG
Installation Instructions
6
6.
You must connect both ends of the insulated signal return wire in
each transmission cable as follows:
connect one end to the dc common terminal of your +5V dc power
supply
connect the other end to the dc common terminal of the field
wiring arm
A
O
1
2
3
4
5
6
7
8
dc common
+5V dc
Output 0
Output 1
Output 2
Output 3
Output 4
Output 5
Output 6
Output 7
Customer
Power Supply
+5V dc
+
-
1
1 Add a pullup resistor (1K ohm typical)
if not internal to the device.
(See applicable codes and laws.)
+
-
The outputs of the 1771OG are opencollector with
internal 1K pullup (up to 5V) resistors.
(Actual wiring runs in this direction.)
1
10447-I
Field Wiring Arm
Cat.. No. 1771WC
Ground cable shield at the chassis
grounding stud or by using single
point grounding
7.
Connect TTL output devices using Belden 8761 shielded cable as
shown in the connection diagram. Do not exceed 50 cable feet for any
output device. Connect the insulated wires to their respective
terminals on the field wiring arm.
Driving Inputs with Outputs
Output terminals of the TTL output module (cat. no. 1771-OG) may
directly drive inputs of a TTL input module (cat. no. 1771-IG). Connect
the cable shield between modules at one end only.