Batboard

Ok, I know most of you are probably going to yell at me, and I apologize in advance, but hopefully someone can help.

I searched. Believe me I did, "CDM accessory pin" "CDM accessory plug" "CDM pinouts" etc. Nada. Tried here, google, and Motorola's sites.

All I want is a description and/or diagram of the accessory port pin-outs for the CDM 1250/1550 series, so I can see what I can play with to interface different items.

Any help would be appreciated. Thanks.

http://www.batlabs.com/images/rkn4083.gif

and you'll need this...

http://www.batlabs.com/images/cdmacc.gif

Perfect, thank you.

Is there a description of the terminals? For instance, if I wanted to hook a remote mic jack, I'd obviously need to wire the PIN 2 to the mic. But to activate PTT on PIN 3, do I simply apply +12vdc? (I'm also looking to interface with a COM port on a computer, so the computer can transmit audio over the radio.) I'm guessing +12vdc is a little too high for a signal voltage, and I'm a bit confused because the diagram indicates "digital" for the PTT.

Thanks!

Before you go and do anything to your radio, I would suggest that you obtain a service manual for it. Your comments
point to a complete lack of understanding on just how this radio works and what signal levels are used on what pins.

It is much cheaper to spend some time learning, than to throw your money away by having to repair the radio
because you applied a voltage to a pin that needed a ground.

Case in point, I had just got through asking a tech if he had checked his wiring. His statement was "I don't
need to do that, I always wire things correctly". With no fuse in the ignition wire, he tried powering up the
radio. W thin wisp of smoke came out of the radio. He had wired the ground and +12 volt ignition feed to
the accessory connector backwards. End result is he blew the internal ribbon cable. That became his fuse.
End result is now after paying for the repair of the radio, he double checks his work before applying power.
I even find fuses of the proper value in line with the power wires.

You might want to check out the site: http://www.batlabs.com to obtain some information on what your looking for.

Jim

bcweis wrote:Perfect, thank you.

Is there a description of the terminals? For instance, if I wanted to hook a remote mic jack, I'd obviously need to wire the PIN 2 to the mic. But to activate PTT on PIN 3, do I simply apply +12vdc? (I'm also looking to interface with a COM port on a computer, so the computer can transmit audio over the radio.) I'm guessing +12vdc is a little too high for a signal voltage, and I'm a bit confused because the diagram indicates "digital" for the PTT.

Thanks!