would like to ask if anyone connected pc to a powermax panel without the RS module. since the panel i have ( a little old) has 4 pins but the rs 232 is an optional and i cant find anyone sellin it. if anyone cabled those pins, can you tell me how to do? thank you for the help!Powermax RS232 module
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Powermax RS232 module
Hi everyone, searching the web for some information, i got here! would like to ask if anyone connected pc to a powermax panel without the RS module. since the panel i have ( a little old) has 4 pins but the rs 232 is an optional and i cant find anyone sellin it. if anyone cabled those pins, can you tell me how to do? thank you for the help!
would like to ask if anyone connected pc to a powermax panel without the RS module. since the panel i have ( a little old) has 4 pins but the rs 232 is an optional and i cant find anyone sellin it. if anyone cabled those pins, can you tell me how to do? thank you for the help!Re:Powermax RS232 module
I'm actually trying to do the same. I have also an old Powermax (H 5452, manufactured in 2002). It also has 4 pin connector for the RS232.
I'm not sure yet, but I think the pin out is as follows (looking from the back towards the connector):
<+5v> <Tx> <Rx> <GND>
The GND pin I guessed by looking at the PCB layout. The 5V I measured with a multi-meter (wrt GND). Using an oscilloscope I measured that <Tx> is most of the time at 5V. Sometimes The voltage is pulled down (when going in/out of the installation menu). I believe <Rx> has a high impedance because the oscilloscope picks up noise when connected to this pin.
I was hoping to see some periodic serial communication on the <Tx> pin. However, I didn't see that (yet). Also not sure if the powerlink protocol as described in this forum is applicable for these old powermax panels.
I'm not sure yet, but I think the pin out is as follows (looking from the back towards the connector):
<+5v> <Tx> <Rx> <GND>
The GND pin I guessed by looking at the PCB layout. The 5V I measured with a multi-meter (wrt GND). Using an oscilloscope I measured that <Tx> is most of the time at 5V. Sometimes The voltage is pulled down (when going in/out of the installation menu). I believe <Rx> has a high impedance because the oscilloscope picks up noise when connected to this pin.
I was hoping to see some periodic serial communication on the <Tx> pin. However, I didn't see that (yet). Also not sure if the powerlink protocol as described in this forum is applicable for these old powermax panels.