Horner APG RCS SmartStix - Manual (Page 31)

CH.2 15 MAR 2003 PAGE 31
MAN0305-04
a.
RS-232 Communications Wiring
The MiniOCS / MiniRCS features an RS-232 port (Programming/Debug) for connection to a personal
computer. This port is used for the purposes of MiniOCS / MiniRCS programming, configuring,
monitoring, and debugging. This port can also be used for general ladder logic controlled serial
communications to printers, modems, terminals, etc. When ladder has control of this port, it is not
available for programming or debugging. The wiring diagram for the RS-232 ports is shown in Figure
2.18Figure 2.18. For connection between the MiniOCS / MiniRCS and the PC, the use of a shielded,
multiple conductor wire with a maximum length of 15.24 meters (50 feet) enables proper performance.
Note: A shorter cable can be required when used for high-speed MiniOCS / MiniRCS firmware updating.
Figure 2.18 – MiniOCS / RCS to PC Wiring
2.3.5 Modem Setup
A modem can be used for remote communications between a computer (using Cscape Software) and the
MiniOCS / MiniRCS. The modem must operate at 9600 baud or higher.
Figure 2.19 – Modem Setup
OCS RS-232 9-PIN PC COM
SHIELDED MULTI CONDUCTOR
DCD 1 1 DCD
RXD 2
TXD 3
DTR 4
GND 5
DSR 6
RTS 7
CTS 8
RI 9
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
DB9
MALE
DB9
FEMALE
15.24 METERS MAX
(50 FEET MAX)
Mini
Telephone
System
Telephone
System
PC Modem Modem