I had a similar problem about 18 years ago. My tech's called to say that every time they plugged the touch panel in the Crestron 75w power supply would die and when they unplugged it the CNMS controller would reboot.
Went to the job site, took one look at the connector to the touch panel and told them they had wired it back the front. They loudly protested and showed me that it matched what was on the back of the touch panel. Crestron had screen printed the label in reverse!
Lindsay
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--- In Crestron@..., "weddellkw" <weddellkw@...> wrote:
Wrapping up a system and all thats left are the 3 rs232 devices (security, somfy, nyssan/embedia shades).
We do the security all the time, Somfy occasionally, so felt pretty comfortable with that.
Could not get anything to communicate. Spent half the day on the phone with security MFR, checking voltages/etc. Disconnected, things seem fine on each end of the RS232 cable. Plugged in, nothing happens.
Replace the cables. Replace the DB9 adapters. Jump pins 2&3 to watch the TX come back over the RX line. Looks fine. Still nothing happening.
After banging my head against the wall all day I leave the 'cap' portion of the DB9 connectors off and plug the pins/sockets directly to the RS232 ports of security/Crestron. Success.
The problem: All of the male DB9 connectors in this 10-part bag are numbered in reverse. Never occurred to me to question that and it didn't trigger any warning in putting them together/testing them. Had to look them up online and find an old DB9 to confirm I wasn't going nuts.
