Connecting Digital Input Signals - Data Translation DT9871 User Manual

Digital Input 1+
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

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.
Instrument
Digital I/O Connector
pin 1
pin 2
pin 20
pin 21
*1 k pull-up to +5 V required for TTL outputs.
2
TB1

21
1 20 18 19 37
3

22
TB2
4

23
5

24
6

25
7

26
TB4
8

27
9
28
Figure 25: STP37 Screw Terminal Panel
DIN 0 +
DIN 1 +
DIN 0 –
DIN 1 –
Figure 26: Connecting Digital Inputs
36 Digital Output 7
Digital Output 7
17
35 Digital Output 6
16 Digital Output 6
TB3
Digital Output 5
34
15 Digital Output 5
33 Digital Output 4
14 Digital Output 4
32 Digital Output 3
Digital Output 3
13
31 Digital Output 2
12 Digital Output 2
TB5
Digital Output 1
30
11 Digital Output 1
29 Digital Output 0
10 Digital Output 0
+5 V*
1 k*
TTL Outputs
Wiring Signals
61