Section 2: Connection; Standard Design; Connection Board (Customer End) - Emerson Bettis RTS Installation, Operation And Maintenance Manual

Section 2: Connection

November 2021
Section 2: Connection
Depedning on the order, here are the following connections possible:
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2.1

Standard Design

Connecting the actuator to the fieldbus system is accomplished through connecting the
bus cable to the connection print in the connection compartment of the actuator. Thus for
convinience, the Modbus RTU connector is pluggable like every other external connector
for signal or power on our actuators. Disconnecting a device will have no effect on the
communication of other devices in the same strand. Meaning, the network maintains full
functionality if a device is disconnected while the network is in operation. But beware, at
the end of each strand Modbus RTU has to be terminated. This termination can either be
performed by RTS control unit or a separate active bus termination device. Note that the
power for the termination resistors of RTS control unit comes from the actuator. Hence,
disconnecting the terminating RTS control unit renders the bus in this strand inoperational.
Therefore, it is advised to use active bus termination through a dedicated device.
The single-channel version of RTS control unit is connected to Modbus RTU via channel I.
The dual channel version (Option: redundant) is connected via channel I and II.
2.1.1

Connection Board (Customer End)

The connection board is situated in the connection compartment under the topmost cover.
Figure 1
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Installation, Operation and Maintenance Manual
standard design: connection board
explosionproof design: terminals
Connection Board
VCIOM-16741-EN Rev. 0
Connection