Mitsubishi Electric 800 Series Installation Manualline page 32

WIRING
2.4.3 Wiring precautions
l It is recommended to use the cables of 0.3 to 0.75mm² gauge for connection to the control circuit terminals.
l The wiring length should be 30m (200m for the terminal FM) maximum.
l Use two or more parallel micro-signal contacts or twin
contacts to prevent a contact faults when using contact
inputs since the control circuit input signals are micro-
currents.
l To suppress EMI, use shielded or twisted cables for the
control circuit terminals and run them away from the main
and power circuits (including the 200V relay sequence
circuit). For the cables connected to the control circuit
terminals, connect their shields to the common terminal of the connected control circuit terminal. When connecting an
external power supply to the terminal PC, however, connect the shield of the power supply cable to the negative side of
the external power supply. Do not directly earth the shield to the enclosure, etc.
l Always apply a voltage to the alarm output terminals (A1, B1, C1, A2, B2, C2) via a relay coil, lamp, etc.
l When a relay coil is connected to the output terminals, use one with a surge absorbing function (reflux diode). When the
voltage application direction is incorrect, the inverter will be damaged. Pay attention to the diode direction or other
precautions to avoid incorrect wiring.
RUN
SE
Inverter
2.4.4 Control logic (sink/source) change (Standard model / Ethernet model)
The control logic of input signals can be switched as necessary for the standard model and the Ethernet model.
To change the control logic, change the DIP switch position on the control circuit board.
The initial setting of the control logic differs depending on the specification.
(The output signals may be used in either the sink or source logic independently of the switch setting.)
lStandard model
CAUTION
l Never change the control logic while power is ON.
26
RA
24VDC power supply
or
12V power supply
For sink logic
SINK
SOURCE
Micro signal contacts
lEthernet model
SINK
Twin contacts
For sink logic
SOURCE