Firmware Version 3.5 Factory Field Installation
24-10025-199 Rev. –
2
NOTE: You are required to change various Microsoft® Windows settings on this
computer. To minimize any future issues you may encounter as a result of these
changes, we recommend keeping track of your customer settings using Ta ble 1:
Computer Settings and restoring them after the upgrade.
• RS232 Null Modem Cable (DB9F/F), for example, Black Box EYN257T-
0015-FF or equivalent
• 10/100Base-T CAT5 Ethernet crossover cable when connecting CK721-A
directly to computer, or a standard CAT5 straight-through cable if
connecting to most laptop computers or to a hub or switch. For straight-
through cable use Black Box EVCRB82-0020 or equivalent
•The CK721a ISO file from the following site:
https://my.jci.com/sites/P2000EngrSup/Pages/Firmware-Downloads-NA.aspx
• Terminal Emulation Software (Tera Term Pro preferred). To use the free
Tera Term Pro software, download and install Version 2.3 from the
following site:
http://hp.vector.co.jp/authors/VA002416/teraterm.html
Cable Wiring
Null Modem Cable
The null modem cable provides an RS-232 serial connection from the
CK721-A controller RS232C A port to the computer’s COM port.
For CK721-A the connector style is 9-pin D-Sub female. Refer to your
computer’s documentation for its connector style.
Connector 1 Pinout Connector 2 Pinout
TX = Transmit
RX = Receive
RTS = Request to Send
CTS = Clear to Send
SG = Signal Ground
DSR = Data Set Ready
DTR = Data Terminal Ready
3 TX 2 RX
2 RX 3 TX
7 RTS 8 CTS
8 CTS 7 RTS
5 SG 5 SG
6 DSR 4 DTR
4 DTR 6 DSR
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