GAI-Tronics 227-001 Auto-dial Telephones - Manual (Page 15)

Pub. 42004-338F
Model 227-001, 247-001, 257-001, and 277-001 Industrial Auto-dial Telephones Page 15 of 19
f:\standard ioms - current release\42004 instr. manuals\42004-338f.doc
06/12
Auxiliary Output
Each telephone includes one isolated solid state volt-free closure capable of switching a maximum of 48
V dc, 125 mA; or 28 V
RMS
ac, 80 mA
RMS
. TB2 (AUX OUT) on the Main PCBA provides the connections
for the auxiliary output. Refer to Figure 14 for location of TB2.
The auxiliary output allows peripheral equipment, such as beacons, video cameras, and alarm generators,
to be activated when the handset is off hook. The relay remains energized for the duration of the call.
Figure 14. Location of TB2 on Main PCBA