Clear-Com HX System Frames - Manual (Page 34)

current through the opto-isolator. It is therefore possible to connect the input pins directly to the
EXTVIN– level to cause an active input.
Note:
The voltage level at the external input pin should not be allowed to go below EXTVIN– or above
+6 V with respect to EXTVIN–.
Figure 10: Pin connection General Purpose Inputs, DB-25F connector
DB-25F Connector
Pin Description
Pin 1 Logic input 1
Pin 2 Logic input 2
DB-25F connector
10
1
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Logic input 1
Logic input 2
Logic input 3
Logic input 4
Ground
Ground
Ground
Ground
Ground
Logic input 5
Logic input 6
Logic input 7
Logic input 8
V IN +
V IN +
V IN -
V IN -
34 Eclipse HX-PiCo User Guide