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Modbus Gateway – BB-MESP211T
CONNECTING THE BB-MESP211T
The BB-MESP211T has a 5-position, pluggable terminal block connector.
If you select RS-232 mode when you configure the Modbus Gateway, you must connect the Modbus
serial network to the Modbus Gateway via a serial cable. The BB-MESP211T is a DTE. If the Modbus
network is a DTE, use a null modem (cross-over) cable.
If the Modbus network is a DCE, use a straight-through cable. DTE and DCE ports are complementary,
the Output signals on a DTE port are Inputs to a DCE port, and Output signals on a DCE port are
Inputs to a DTE port. The signal names match each other and connect pin for pin. Signal flow is in the
direction of the arrows
BB-MESP211T Serial Connections
BB-MESP211T Connections
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