Mitsubishi Electric FR-D720S SC EC Instruction Manual page 51

Wiring
Output signals
Terminal
Tab. 3-10: Output signals
Communication
Name
PU connector
Tab. 3-11: Communication signal
FR-D700 SC EC
Name
Relay output
A, B, C
(alarm output)
RUN Inverter running
Open collector
SE
output common
Analog voltage
AM
output
Description
With the PU connector, communication can be
made through RS485.
Description
The alarm is output via relay contacts. The
block diagram shows the normal operation and
voltage free status. If the protective function is
activated, the relay picks up.
B A
C
Switched low when the inverter output fre-
quency is equal to or higher than the starting
frequency (initial value 0.5Hz).
Switched high during stop or DC injection
brake operation.
Reference potential for the signals RUN and
SO.
Select one e.g. output fre-
quency (Pr. 158) from 18
monitor items.
The output signal is propor-
tional to the magnitude of
the corresponding monitor-
ing item.
Not output during inverter
reset.
Control circuit specifications
Rated
Specifications
Contact
capacity:
230V AC/0.3A
(Power
factor: 0.4) or
30V DC/0.3A
Permissible
load:
24V DC (max.
27V DC), 0.1A
(A voltage drop
is 3.4V maxi-
mum when the
signal is on.)
—
Output signal:
0–10V DC
Permissible
Output item: load current:
Output 1 mA
frequency (load imped-
(initial setting) ance:
≥ 10kΩ)
Resolution:
8 bit
Specification
Conforming standard:
EIA-485 (RS485)
Transmission format:
Multidrop
Communication speed:
4800 to 38400bps
Overall length: 500m
Refer to
Page
6-98
—
6-118
Refer to
Page
3-30,
6-193
3 - 15