Toshiba MD911 Instruction Manual page 25

Install the MD911 module to each of the base units.
(1) Hook the module to the slot on the bottom of the module in the lower part
of the base unit, and rotate it to fit the connector.
(2) Secure it to the base unit with the fixing screw on the top of the module.
(3) Connect the MODBUS transmission cable (MODBUS cable:
RS485/RS232C cable) to the MD911 module. RS-232C is for connector
connection, and RS-485 is for terminal block connection.
(4) Set the maintenance switch to RUN.
Remark
・ Two sets of MD911 can be used in one BU901
(2)
(3)
(1)
(3)
(4)
Figure 2-3 Installing the module
Perform a check before operation.
Before turning on the power to operate the product, check again that the
switch setting, installation, and wiring are as described in this operation
manual.
Base unit
MD911 module
Unified Controller nv series MODBUS (MD911) Module Instruction Manual
2.2 Installing the Module
13