P
UB
42004-438A
300
S
ERIES
E
MERGENCY
T
ELEPHONE
M
ANUAL
P
AGE
20 of 44
f:\standard ioms - current release\42004 instr. manuals\42004-438a.doc
02/11
External Power for -003 and -004 Models
The Plug-in Power Supply is used for operations below
−
4º F (
−
20º C) and requires 120 V ac input to
provide a 5 V dc output to the unit. The Plug-in Power Supply is provided with a connectorized, 4-foot
power cable that plugs into P17 on the telephone PCBA. Remove the jumper from P17 pins 3 and 4 and
insert to the adjacent header J18 when using the plug-in power supply.
N
OTE
:
The external power supply provided with these models does not provide telephone line power for
communications. It simply activates a heater circuit to allow operation to
−
40º C.
Connecting a Model 530 Strobe
Figure 22 below shows a typical connection detail of the GAI-Tronics 530-001/531A Strobe (sold
separately).
Figure 22. (Model 398-00x is shown as an example)
Connection to Optional GAI-Tronics 530-001/531A Strobe