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17431 N. 25
th
Avenue - Phoenix, Arizona 85023
Phone: (623) 581-2875 - Toll Free: (800) 796-2875 - Fax: (623) 582-9499
[email protected] – www.emrcorp.com
Accessory Connector Connections
Wire/Cable Requirement
Since each installation is different, we do not supply a cable for the electrical hookup. Any combination of 24
AWG stranded wire will do. A typical shielded multicable used for connecting Radio Local controls such as
Beldon 9538 works well. In some cases (RF Sites with extremely high RF levels) may require Shielding on
each individual wire.
The installation below is based on using a section of Beldon 9538 multicable.
Also, installing a 2 Amp Fuse assembly is recommended on the A+ Lead.
Input and Output Requirements
Most modern repeater/base stations have accessory connectors to simplify installing optional
equipment such as Local Controls. Many have programmable Input/outputs that use TTL levels (0 Vdc=Low
5 Vdc= High). With this in mind the Ipm-1 was designed to interface with TTL. The installation
procedure below is based on a repeater having TTL inputs and outputs.
Please call the factory for assistance if your application is not TTL.
25
Pin #
Signal
Type I/O
1
Ground
Analog Ground
2
Not Used
3
Not Used
4
Ground
Analog Ground
5
Relay - C
Switch common
6
Relay - NC
Switch Normally Open
7
Relay - NO
Switch Normally Closed
8
PTT Sense
TTL Input
9
COR Sense
TTL Input
10
12 to 15 VDC
DC Input
11
PTT
TTL Output
12
Ground
Analog Ground
Fig. 36