18
POWER CONNECTOR
The
Power
Connector
is a removable two-position screw terminal block with screw
down. The MES1A/B requires between 10 VDC and 30 VDC (3.6 Watts). Typically a 12
VDC power adapter is connected to the terminal block via bare wires. The terminal
block can be unplugged to remove the converter from service.
MES1A/B Power Connector
CONNECTING THE HARDWARE
The
MES1A
is connected to its Modbus device via a DB-9M connector and an RS-232
cable. The MES1A is configured as a DTE. If the connected Modbus device is
configured as a DCE, use a straight-through cable. If the connected Modbus device is
configured as a DTE, use a null modem cable.
Always check the interface specifications of the
Modbus device to determine whether it is a DTE or
DCE before connecting.
The
MES1B
is connected to its Modbus device via the RS-422/485 terminal block. In
RS-422/485 four-wire mode a cable containing two pairs and a ground/shield is used.
In RS-485 two-wire mode a cable containing one pair and a ground/shield is used.
Power is supplied to the converter via the power supply terminal block.
