Delta MMC120 User Manual
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Some Temposonics I transducers from MTS have 200 Ohm termination resistors installed
between their interrogation pins and common. If yours do not, it may be necessary to
install them as close to the transducers as possible to reduce electrical noise in the system.
Serial Port
DB-9
Pin
Function
2
Receive
3
Transmit
5
Common
The communication cable attached to the serial port is a potential source of
electromagnetic radiation from the MMC120. To minimize radiation, use a well-shielded
cable that is as short as possible, and route it out the bottom of the module and against the
back panel.
A standard Modicon Modbus cable will work in this port, or one can be built using the
following diagram: