ZEN-LOG-MAN-16V03 (0930)
Copyright © 2016 Define Instruments
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6.6 - Port 1
Port 1 on the Zen Datalogger can be purchased with an auto-detecting RS485/RS422 port
(order code '-RS'), or as an Ethernet Modbus terminal (order code '-EMOD'). If you have the
auto-detecting RS port, refer to the diagrams below for wiring.
RS485
CO
M
Tx+
Tx
−
NC
NC
RS422
CO
M
Tx+
Tx
−
Rx+
Rx
−
NOTE
Pins marked 'NC' MUST be left disconnected to ensure correct auto-detection of
your comm type.
6.7 - Port 2
Port 2 can be wired for either RS232
or RS485 serial connection, as shown
(right).
NOTE
Pins marked 'NC' MUST be
left disconnected to ensure
correct auto-detection of
your comm type.
TX
CO
M
RX
NC
NC
RS232
Tx+
Tx
−
CO
M
NC
NC
RS485
