Figure 28 Other CPU Ports
The programming port/RS232 port can be used with any
of the following Rievtech devices. ELC-RS232, ELC-USB,
ELC-Copier, ELC-MEMORY, ELC-BATTERY, and PRO-RS485.
This is COM 0.
When the programming port is being used as the standard
RS232 port (D-shape 9 pin header). The ELC-RS232 cable is
needed. Below shows you the pinouts for the device:
Figure 29 RS232 Pinouts
Expansion port/RS485 (pin definition)
Figure 34 RS485 Pinouts
3------RS485 A 7------CANL
5------RS485 B 9------CANH
4------GND 15------+5V
6------GND 16------+5V
Communication between CPU and expansion module will
use pins 4, 7, 9 and 15.
PR-RS485 module is required when either the PR-18/ELC-
22/PR-24 CPU is required to communicate with a third-
party device via RS485. Note the PR-24 has a built-in
RS485 too.
Figure 30 COM Port Details on LCD
The programming port/RS232 port can be used with any
of the following Rievtech devices. ELC-RS232, ELC-USB,
ELC-Copier, ELC-MEMORY, ELC-BATTERY, and PRO-
RS485. This is COM 0.
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