Mitsubishi Electric FR-CC2-P, Instruction Manual

Page: 45 / 184

Control circuit
44
INSTALLATION AND WIRING
 Output signal
 Communication
Ty
p
e Terminal
Symbol
Terminal name Terminal function description Rate Specification
Re
lay
A1,
B1,
C1
Relay output 1 (fault
output)
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) Contact capacity 230
VAC 0.3 A (power
factor = 0.4)
30 VDC 0.3 A
88R,
88S
For manufacturer setting. Do not use.
Open collector
RDA
Inverter operation
enable (NO contact)
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. 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).
RDB
Inverter operation
enable (NC contact)
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.
RSO Inverter reset
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.
IPF
Instantaneous power
failure
Switched to LOW when an instantaneous power failure is detected.
FAN Cooling fan fault Switched to LOW when a cooling fan fault occurs.
SE
Open collector output
common
Common terminal for terminals RDA, RDB, RSO, IPF, FAN ———
Ty
p
e
Terminal
symbol
Terminal name Terminal function description
RS-
485
——— PU connector
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
RS-485 t
erminals
TXD+
Converter unit
transmission terminal
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
TXD-
RXD+
Converter unit
reception terminal
RXD-
GND
(SG)
Earthing (grounding)
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.