RTU Modbus interface : MPNC006 Mect srl
4
ME7084_05 07/21
1.4
Security
Attention
Switch off devices before connecting them .
Attention
MPNC006 must be mounted inside cabinet or electrical
switchboards whose access must be performed by qualified
personnel.
ESD
(Electrostatic discharge)
Modules have electronic components that can be damaged by
electrostatic discharge. Be sure to be connected to ground when
handle the devices.
The instrument has no power switch and no internal fuse, but it powers on
immediately after
the correct supply voltage has been supplied (check the value of
the supply voltage indicated on the instrument label under
“Supply”). Provide a
power supply line as direct as possible and separate from the line that supplies the
power elements.
For safety regulations, it is necessary to provide a two-phase switch-disconnector
with fuse located near the instrument and easily replaceable.
Avoid the presence of power elements (contactors, motors, drives, etc.), excessive
humidity, heat sources and corrosive gases in the same panel.
Instruments must be powered by safety transformers or by SELV-type power
supplies.
2
Hardware Installation
2.1
System description
The MPNC006 is a RTU Modbus bus coupler device. The device interfaces on an
internal bus with terminals for different types of signals, both digital and analog.
The RS485 ModBus/RTU slave interface allows the MPNC006 to communicate with
an operator panel for displaying PLC variables.
Analog and digital terminals (MPNC020; MPNC030; MPNC035) can be connected
to the MPNC006; communication between the terminals and the MPNC006 via an
internal bus called TBUS.