Control Circuit Specifications - Mitsubishi Electric FR-D720S SC EC Instruction Manual

Wiring
3.4

Control circuit specifications

The functions of the terminals highlighted in grey can be adjusted with parameters 178 to 182
"Input terminal function assignment" and Pr. 190, Pr. 192 or Pr. 197 "Output terminal function as-
signment" (refer to section 6.9). The listed settings show the default configuration as shipped,
which you can restore by resetting to the factory defaults.
Input signals
Terminal
RH, RM, RL
Tab. 3-9: Input signals (1)
FR-D700 SC EC
Name
Forward rotation
STF
start
Reverse rotation
STR
start
Multi-speed
selection
Contact input
common (sink)
SD
24V DC power
supply common
24V DC
power supply,
PC
contact input
common (source)
Description
Turn on the STF signal to
start forward rotation and
turn it off to stop.
Turn on the STR signal to
start reverse rotation and
turn it off to stop.
Multi-speed can be selected according to the
combination of RH, RM and RL signals.
A determined control function is activated, if
the corresponding terminal is connected to the
terminal SD (sink logic).
The SD terminal is isolated from the digital
circuits via opto-couplers. The terminal is
isolated from the reference potentials of the
analog circuit (terminal 5) and the open
collector outputs (terminal SE).
24V DC/0.1A output
With negative logic and control via open col-
lector transistors (e.g. a PLC) the positive pole
of an external power source must be con-
nected to the PC terminal. With positive logic
the PC terminal is used as a common refer-
ence for the control inputs. This means that
when positive logic is selected (default setting
of the EC units) the corresponding control
function is activated by connecting its terminal
to the PC terminal.
Control circuit specifications
Rated
Specifications
When the STF
Input resist-
and STR signals
ance: 4.7kΩ
are turned on
Voltage at
simultaneously,
opening:
the stop com-
21V to 26V DC
mand is given.
Contacts at
short-circuited:
4 to 6mA DC
—
Power supply
voltage range:
22V to
26,5V DC
Permissible
load current:
100 mA
Refer to
Page
6-88
—
3-27
3 - 13