Mitsubishi Electric A800 Instruction Manual page 33

Terminal connection diagrams
Wiring between the converter units and the inverters
 Main circuit terminal
• Wire terminal P (+) on the converter unit to terminal P on the inverter, and do likewise for terminal N (-). Pair the masters
or the slaves (1 with 1 or 2.with 2). Otherwise, the converter unit and the inverter may be damaged.
• Use cables of 50 m or shorter each to connect the converter unit and the inverter (for terminal P or N).
• For information about the gauge of cable for terminal P or N, refer to
Power supply

Do not install an MCCB for terminal P or N. Ensure correct connection in polarity of terminals P and N; which may damage the inverter.
 Control circuit terminal
• Wiring both of control circuits in the master converter unit and the master inverter is required. Wire correctly to ensure
the command transmission from the converter unit to the inverter. Otherwise, the converter unit and the inverter may be
damaged.
• Use cables of 30 m or shorter each to wire the control circuits.
Converter unit
RDA
RDB
IPF
RSO
SE

For the terminal used for the X10 signal input, set "10" in any of Pr.178 to Pr.189 (Input terminal function selection) to assign the function.
(The X10 signal is assigned to terminal MRS in the initial setting.
The state of contact at terminal MRS is initially set to be normally closed (NC). To change the contact state to normally open (NO), set Pr.599 =
"0".)

For the terminal used for the X11 signal input, set "11" in any of Pr.178 to Pr.189 (Input terminal function selection) to assign the function.
$$The X11 signal is usable to store the inverter state at an instantaneous power failure occurred in communication operation in which the start
command is transmitted only once (such as RS-485 communication) if the state storage is set to be enabled in advance.

It is mandatory to wire terminal RDA on the converter unit to terminal MRS (X10) on the inverter and to wire terminal SE on the converter unit to
terminal SD (sink logic) on the inverter. Otherwise, the converter unit may be damaged.
32
INSTALLATION AND WIRING
Converter unit
∗1
R/L1 P/+
N/-
S/L2
T/L3
R1/L11
S1/L21
Inverter
∗3
MRS(X10）
∗1
∗2
X11
RES
∗3
SD
page
Inverter
P/+
U
N/-
V
To motor
W
R1/L11
S1/L21
35.