CHAPTER 4– DATA COMMUNICATIONS INTERFACE
4.2.4.1 COM3 – RS232 - Host Ticket Printer/Data Logger
A Ticket Printer or Data Logger can be connected to the MultiLoad III/RCU III EX Hardware via
RS232 on COM 3.
The TX and RX are swapped at the MultiLoad III/RCU III EX Hardware.
Handshake lines MUST be connected or terminated, or a printer error will be reported.
MultiLoad III/RCU III EX Hardware will monitor the CTS, DSR and DCD for active signals.
MultiLoad III/RCU III
CTS
GND
DSR
DCD
RTS
DTR
Figure 4.10
CTS
GND
DSR
DCD
RTS
DTR
Figure 4.11
When Print or Alibi Log is configured to be on COM 3, the CTS handshake line MUST be
connected, or a printer error will occur, preventing loading.
36
MultiLoad III/RCU III Hardware - Explosion Proof (EX) Installation Guide
COM 3
RX
TX
Ticket Printer / Data Logger Connections with Handshake
MultiLoad III/RCU III
COM 3
RX
TX
Ticket Printer / Data Logger Connections without Handshake
Printer/ Logger RS232
DB25 Connector
2 – TX
20 - DTR
3 – RX
7 – GND
4 – RTS
5 – CTS
6 – DSR
8 – DCD
Printer/ Logger RS232
DB25 Connector
2 – TX
20 - DTR
3 – RX
7 – GND
4 – RTS
5 – CTS
6 – DSR
8 – DCD
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