Pac 232c

I need help for 232C function of PAC unit.

I made below simple logic in PICED.
I tested it on simulation mode in PC, Spectrum unit and PAC unit.
I was able to get 'X' character in the target unit testing simulation mode and spectrum.
But I cannot get 'X' character testing PAC unit.

I made a connection cable using pink C-Bus LAN cable.
PIN No.4 GND (blue)
PIN No.5 RD (blue/white)
PIN No.6 TD (orange)
PIN 1-3,7,8 no connection

I did not add 12V DC and 24V AC power.

Please give me advice.
Should I add 24V AC power to PAC?
Did i make wrong cable?

Regards,
---------------------------------------------

{Enter Variable definitions here}
get_temp_c : string;

{Enter Initialisation code here}
TimerStart(Timer1);


Get_Temp_DT
once TimerTime(Timer1) >= 2 then
begin
OpenSerial(1, 1, 9600, 8, 1,0, 0);
get_temp_c := 'X';
WriteSerial(1, get_temp_c);
CloseSerial(1);
TimerStart(Timer1);
end;

 

You need to supply external power to the PAC in order to use the RS232 ports. Either have the device you are communicating with supply power by pulling the DTR and RTS lines (pins 3 and 8) one high and one low, or connect a 24 Vac supply. Full details are in the installation instructions.

 

Hi TimB,

Thank you very much for your advice.
This is my understanding for your email.

PAC's 232C driver IC is working by C-Bus power.
But PAC does not make 232C interface driving power.
So, PAC needs external power for it.

Is my understanding correct?

I have a question.
Is programming cable for old B&W touch panel useful for PAC connection?

Regards,

 

Yes, the PAC serial connections and B&W C-Touch programming cable use the same pinouts.