Mitsubishi Electric AJ65BT-RPI-10A User Manual page 40

(3) Termination resistor switch
The termination resistor switch is used to set whether the built-in
termination resistor (110) of the AJ65BT-RPI-10A/10B is used
(ON) or not (OFF). Set this switch to the ON (used) position when
the AJ65BT-RPI-10A/10B is located on either side of the segment
and the accessory termination resistor is not used.
POINT
• In either of the following cases, do not use the built-in termination resistor
(110) of the AJ65BT-RPI-10A/10B but use the accessory termination
resistor.
1) When the 130 termination resistor is needed.
2) There is a possibility of removing the AJ65BT-RPI-10A/10B without
affecting the other stations for maintenance or other purpose.
When the built-in termination resistor is used, removing the terminal
block from the module makes the termination resistor disconnected,
disabling the other stations from making normal communication.
• Do not use the built-in termination resistor and accessory termination resistor
of the AJ65BT-RPI-10A/10B at the same time.
Doing so makes the module doubly provided with the termination resistors,
disabling normal communication.
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