Instruction manual

2
1. Operation of ZM-300 Main Menu 2-7
LCD Control Terminal Operations
MJ1/2: RS-232C Signal Test
Turn the [MJ1] (or [MJ2]) and [RS232C] switches on.
• RS-232C Self-loop Test
Check the signals [SD] and [RD]. Connect the data transfer cable (ZM-80C) to CN1 for
the test.
1. Set the adaptor ADP25-9 (attached to ZM-80C) to the cable ZM-80C. Connect the
modular jack side of the cable to MJ1 (or MJ2) and the ADP25-9 side to CN1.
2. Press the [Self-Loop Test] switch. When the [OK] lamp lights up, the test is
successfully completed.
CN1
RS232C
MJ1 RS485
MJ2
Communication Port
CN1 MJ1/2
ZM-80C
ADP25-9
Self-Loop Test
CTS RTS
NG OK
Self-Loop Test
CTS RTS
NG OK