Johnson Controls CK721-A - Computer to CK721-A Controller Connection

Software Version 3.3 Factory Field Upgrade
24-10025-113 Rev. –
3
Ethernet Crossover Cable
The Ethernet crossover cable provides an network connection from the
CK721-A controller Ethernet port directly to the computer’s network
port.
Ethernet Straight-through Cable
The Ethernet straight-through cable provides an network connection from
the CK721-A controller Ethernet port to the computer’s network port via
a hub or switch.
C
OMPUTER TO CK721-A CONTROLLER CONNECTION
To connect the computer to the CK721-A controller:
1. Connect one end of the RS232 Null Modem Cable to the COM 1 or
COM 2 port of the computer. Connect the other end to the RS232C A
port of the CK721-A controller.
Connector 1 Pinout Connector 2 Pinout
TX = Transmit
RX = Receive
1 RX+ 3 TX+
2 RX- 6 TX-
3 TX+ 1 RX+
6 TX- 2 RX-
Connector 1 Pinout Connector 2 Pinout
TX = Transmit
RX = Receive
1 TX+ 1 RX+
2 TX- 2 RX-
3 RX+ 3 TX+
6 RX- 6 TX-