Communications Installation - Connecting the HC900 Controller to a PC with the Designer Software
124 HC900 Process Controller Installation and User Guide Revision 19
06/14
RS-232 Direct Link to PC Configuration Tool
The Controller can be connected directly to the PC, in which case a Null Modem Cable is required. The
Null Modem Cable can be ordered from Honeywell (Part# 50004820-501). Cable connections are shown
in Table 19.
Table 19 – Null Modem Cable Connections
9-pin D female connector 3-plug connector
Signal Name Pin No. Connection Signal Name Plug No.
DCD 1 None
RXD 2 Connects to TXD 2
TXD 3 Connects to RXD 3
DTR 4 None
GND 5 Connects to GND 1
DSR 6 None
RTS 7 None
CTS 8 None
RI 9 None
5
1
9
6
4
3
2
8
7
1
2
3
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