rs-232 serial driven "led annunciator panel"


Thread Starter

Warren Postma

Our application area is emergency power (gensets) and switchgear.

We have some engine and generator status data which is obtained via a custom serial protocol from our engine and generator controller devices which are already reading into our RTU product. The product only has 8 outputs right now, and we need to drive 20 status lights as well. We do have some RS-232 serial ports available which could drive remote io (such as a Opto-22 Snap
Brain, or any Modbus capable device), however it would be nicer to get an intelligent "LED annunciator panel" with an RS-232 port.

So what I want to know is, has anyone ever seen such an Annunciator Panel, preferably it can be addressed as a Modbus RTU Slave? A custom protocol would be fine also, as we can program a new protocol into our RTU product a lot easier than we can change it's current local digital and analog I/O population.

If it were possible, we would use an LCD OIT DISPLAY, but the customer definitely wants an Annunciator panel. I have found one example at but I am searching for others as well.

Warren Postma
ZTR Control Systems
[email protected]