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

Firmware Version 3.5 Factory Field Installation
24-10025-199 Rev. –
3
Ethernet Crossover Cable
The Ethernet crossover cable provides a network connection from the
CK721-A controller Ethernet port directly to the computer’s network
port, using RJ-45 modular plugs on each cable end.
Ethernet Straight-through Cable
The Ethernet straight-through cable provides a network connection from
the CK721-A controller Ethernet port to the computer’s network port via
a hub or switch, using RJ-45 modular plugs on each cable end.
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. For computers and laptops without
serial connectors use USB to serial adapter. 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-