RC210 <-> MSR2000 (OPP Special) Connections by Paul Caccamo, VA3PC (va3pc at ciinet dot org)
DB9 |
Function |
Backplane Connection |
1 |
CTCSS Encode |
Pin 14 Duplex PL Module TRN5073 (Active LOW) |
2 |
CTCSS Detect |
Pin 5 Duplex PL Module TRN5073A (Active HIGH) |
3 |
Transmit |
Line PTT Terminal on Backplane (Active LOW) |
4 |
Tx Audio |
Pin 11 - Squelch Gate Module TRN5324CDX -or- J102-12 Exciter Xmt Audio |
5 |
Rx Audio |
Pin 17 - Squelch Gate Module (Squelched and De-Emphasized Audio) |
6 |
GROUND |
Pick a Ground on the Backplane |
7 |
COS |
Pin 20 - R1 Audio Squelch Module TRN5069A (Active LOW) |
8 |
GROUND |
Pick a Ground on the Backplane |
9 |
GROUND |
Pick a Ground on the Backplane |
Paul's notes:
This is based on the 5 page article by Henry Wingate, K4HAL at
www.repeater-builder.com/msr2k/msr2k-conversion-k4hal.html
and my notes from interfacing our club's RC210.
I can't get to the repeater at the moment to verify these connections,
but am pretty sure this is how I connected it.
With these connections, I was able to interface the RC210 with no additional hardware.
All functions were controllable in the rC210 software.
The only drawback I found was that the COS light would indicate on the controller when the
repeater was powered down and there was a battery connected to the RC210 standby battery input.
This drained the backup battery fairly quickly.
The alternate connection points are connected to each other through the backplane,
they are listed to provide flexibility in connecting the wiring harness to the DB-9
that is brought out to the RC210 Controller.
The repeater was wired and tested with Stn Control, R1 audio, CTCSS Duplex PL and Line Driver boards
installed (as well as the rx and tx boards). I used shielded CAT5 cable for the interconnection.
After alignment of the receiver remove S201 (rubber membrane type switch) on the receiver board.
It has been known to short and cause dead rx symptoms. Especially important if you are placing the
repeater in a remote location.
GL, 73 Paul
2008-Jan-04