GAI-Tronics 12576-501(x) ADVANCE Rack-Mount Access Panel with LCD Display - Manual (Page 6)

Pub. 42004-728L2D
Model 12576-501(x) ADVANCE Rack-Mount Access Panel with LCD Display Page: 6 of 17
f:\standard ioms - current release\42004 instr. manuals\42004-728l2d.doc
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Contact Closure Inputs
The DB-9 connector on the rear panel allows external switches to be
connected for access to the page switch, hookswitch and three
programmable inputs. The page and hookswitch inputs are wired in parallel
to the page switch contacts (on the handset) and hookswitch contacts (in the
handset cradle). Inputs 1–3 are wired in parallel to push buttons 26, 27 and
28 on the front panel.
Table 1. Contact Closure Input Connector - Pin Out
DB-9 Pin Number Function
1 Input contact 1
2 Input contact 2
3 Input contact 3
4 Page switch
5 Hookswitch
6 GND
7 GND
8 GND
9 GND
Figure 6. Typical Connection Diagram
Figure 5. DB-9 Pinout