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CDM1250 CPS / Accessory Connector Help

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Premium Subscriber
Apr 27, 2005
Southwest Ohio
I'm fairly new to programming these and need some help. I am programming a UHF model for use as a control receiver on one of our repeaters for the Arcom controller (replacing some aging Maxtracs). Arcom advises to program Accessory pins 2, 3, 4, 7, 8, & 11 for the various needs. In the CPS accessory connector tab I can only see pins 3, 4, 6, 8, 9, 12 & 14. What am I doing wrong?



Mar 14, 2004
Refer to the Arcom documentation as to what the needs of the pins are, not the actual numbers. Some of the IO requirements may be static pins found outside of the addressable IO pins on the CDM.


I ♥ Ø
Jul 27, 2005
LATA 722
Here's the pinout for the MaxTrac, slightly different, but most pins are the same.

Be sure you understand the pin numbering on the 16 pin Maxtrac and the 20 pin CDM's. You can use the 16 pin connector on the CDM just fine, you just leave out the two sets of outer pins on each side.

batlabs.com is a great source of Motorola info.


Oct 3, 2015
I was having the same issue he was telling me to program 7 and 8 after looking at diagrams and his wire that he made me I believe he was talking about 12 and 14

Anyhow I'm still in the midst of getting my repeater set up

Anything else I would need to know about the arcom controllers?
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