Data Translation DT9871, User Manual

Page: 61 / 134

Wiring Signals
61
Figure 25: STP37 Screw Terminal Panel
Connecting Digital Input Signals
Figure 26 shows how to connect digital input signals (lines 0 and 1, in this case) to the digital
I/O connector on the TEMPpoint, VOLTpoint, or MEASURpoint instrument.
Figure 26: Connecting Digital Inputs
J1
2
21
3
22
4
23
5
24
6
25
7
26
8
27
9
28
36
17
35
16
34
15
33
14
32
13
31
12
30
11
29
10
1 20 18 19 37
TB2
TB4
TB3
TB5
TB1
Digital Input 1+ Digital Output 7
Digital Input 1

Digital Input 2+
Digital Input 2

Digital Input 3+
Digital Input 3

Digital Input 4+
Digital Input 4

Digital Input 5+
Digital Input 5

Digital Input 6+
Digital Input 6

Digital Input 7+
Digital Input 7

Not Connected
Not Connected
Digital Output 7
Digital Output 6
Digital Output 6
Digital Output 5
Digital Output 5
Digital Output 4
Digital Output 4
Digital Output 3
Digital Output 3
Digital Output 2
Digital Output 2
Digital Output 1
Digital Output 1
Digital Output 0
Digital Output 0
D
igit
a
l Inp
u
t
0+
Dig
ital In
put
0

No
t Co
nn
ected
No
t Co
nn
ected
No
t Co
nn
ected
DIN 0 +
DIN 1 +
TTL Outputs
Instrument
Digital I/O Connector
DIN 0 –
DIN 1 –
1 k

*
+5 V*
*1 k

pull-up to +5 V required for TTL outputs.
pin 21
pin 1
pin 20
pin 2