Pub. 43004-027B
Model IDA1000A DC Remote Adapter Installation and Service Manual
Page 10 of 24
P:\Radio Products-Current Release\43004\43004-027B\43004-027B.docx
06/18
Cable Installation Safety Considerations
Interconnecting, communications and Class 2 dc power cables should be separated from electrical light or
other Class I circuits by at least 2 inches. The exception is where Class I wiring or power circuits are run
in a raceway, metal-sheathed, metal-clad, or are permanently separated from the conductors of the other
circuitry by a continuous and firmly fixed nonconductor such as porcelain tubes or flexible tubing in
addition to the insulation on the wire. Communications cables and in-building wiring should be listed and
marked for the purpose according to NEC Article 800.
Telephone Line Lightning and Over-voltage Protection
For maximum surge and lightning protection, building primary (over-voltage) protectors should be
installed at the point where the phone lines enter the radio equipment building. Primary protectors are
usually required by local codes and should be provided by your local exchange carrier.
The Model IDA1000A has an over-current phone line fuse F2 that protects against occasional extreme
fault conditions that may get past the primary protectors. An example of such a fault condition is a power
line cross. If the fuse requires replacement, replace it with the same type Bussmann C515S 1.25A SB
fuse.
Power Connections
Connections should be made to a 10.5 to 16 V dc source capable of supplying up to 300 mA. An optional
120 V ac wall transformer (Part No. 40419-008) should be used if a suitable dc source is not available.
The Model IDA1000A provides active low outputs referenced to system ground (negative ground
system). To interface with a positive ground radio station, or a radio needing active high signals, requires
relays or opto-isolators that translate the adapter outputs.
Figure 4. Optional
5-Pin DIN
Power Supply
Table 1. Power Connection Pin-out
Pins
Position
Pins 3 and 5
+IN
Pins 1 and 4
-IN
Pin 2
B
