TTL Input Module
Cat. No. 1771IGD
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
dc common
+5V dc
Input 00
Input 01
Input 02
Input 03
Input 04
Input 05
Input 06
Input 07
Customer
Power Supply
+5V dc
+
-
Ground cable shield at the chassis
grounding stud or by using single
point grounding
2
3
3
2
2
3
TTL Devices must have opencollector outputs.
Internal or external pullup resistor (1K ohm typical).
(See applicable codes and laws.)
Input 10
Input 11
Input 12
Input 13
Input 14
Input 15
Input 16
Input 17
+5V dc
+5V dc
+5V dc
(Actual wiring runs in this direction.)
A
B
C
D
00
01
02
03
04
05
06
07
10
11
12
13
14
15
16
17
E
10450I
1
1 You can make this connection to terminal A, B, C or D.
Field Wiring Arm
Cat. No. 1771WH
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
Input terminals of the TTL input module (cat. no. 1771-IGD) may be
directly driven by the outputs of a TTL output module (cat. no.
1771-OGD). Connect the cable shield between modules at one end only.
