Mitsubishi Electric FR-CC2-P Instruction Manual page 45

Control circuit
Output signal
Terminal
Terminal name
Symbol
A1,
Relay output 1 (fault
B1,
output)
C1
88R,
For manufacturer setting. Do not use.
88S
Inverter operation
RDA
enable (NO contact)
Inverter operation
RDB
enable (NC contact)
RSO Inverter reset
Instantaneous power
IPF
failure
FAN Cooling fan fault
Open collector output
SE
common
Communication
Terminal
Terminal name
symbol
——— PU connector
TXD+
Converter unit
transmission terminal
TXD-
RXD+
Converter unit
reception terminal
RXD-
GND
Earthing (grounding)
(SG)
CAUTION
 Do not use the empty terminals (NC) of the control circuit. Doing so may lead to damage of the
converter unit and the inverter.
 Always connect terminal RDA of the master converter unit and terminal MRS (X10) of the master
inverter, and terminal SE of the master converter unit and terminal SD (PC for source logic) of the
master inverter. Not doing so may lead to damage of the converter unit.
44
INSTALLATION AND WIRING
Terminal function description
1 changeover contact output that indicates that the protective function of
the converter unit has been activated and the outputs are stopped.
Fault: discontinuity across B and C (continuity across A and C), Normal:
continuity across Band C (discontinuity across A and C)
Switched to LOW when the converter unit operation is ready.
Assign the signal to terminal MRS (X10) of the inverter.
The inverter can be started when the RDA status is LOW.
Switched to LOW when a converter unit fault occurs or the converter is
reset.
The inverter can be started when the RDB status is HIGH.
Switched to LOW when the converter is reset (RES-ON).
Assign the signal to terminal RES of the inverter.
The inverter is reset when it is connected with the RSO status LOW.
Switched to LOW when an instantaneous power failure is detected.
Switched to LOW when a cooling fan fault occurs.
Common terminal for terminals RDA, RDB, RSO, IPF, FAN
With the PU connector, communication can be made through RS-485. (For connection on a 1:1
basis only)
Conforming standard: EIA-485 (RS-485)
Transmission format: Multidrop link
Communication speed: 4800 to 115200 bps
Wiring length: 500 m
Two converter units in parallel connection have the RS-485 communication via the RS-485
terminals on each converter unit.
Total wiring length: 5 m or less
Terminal function description
Rate Specification
Contact capacity 230
VAC 0.3 A (power
factor = 0.4)
30 VDC 0.3 A
Permissible load 24
VDC (maximum 27
VDC) 0.1 A
(The voltage drop is 2.8
V at maximum while
the signal is ON.)
LOW is when the open
collector output
transistor is ON
(conducted).
HIGH is when the
transistor is OFF (not
conducted).
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