GAI-Tronics 300 Series RED ALERT Emergency Telephone Manual - Manual (Page 22)

P UB . 42004-438K
300 S ERIES E MERGENCY T ELEPHONE M ANUAL P AGE
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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. See Figure 23 on page 23 for
jumper locations.
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 −40 ºC.
Connecting a Model 530 Series 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