Mitsubishi Electric FR-A700 EC, Instruction Manual

Page: 58 / 826

Control circuit specifications Wiring
3 - 20
Terminal Name Description
Rated
Specifications
Refer to
Contact input
SD
External transistor
common, contact
input common
(sink)
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 cou-
plers.
The terminal is isolated from the reference
potential of the analog circuit (terminal 5).
Common reference potential (0V) for 24V DC/
0.1A output (PC terminal).
— —
PC
24V DC
power supply,
contact input
common
(source)
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.
Power supply
voltage range:
19.2 to
28.8V DC
Current con-
sumption:
100mA
3-25
F
requency setting
10E
(Output volt-
age
10V DC)
Frequency setting
power supply
When connecting the frequency setting poten-
tiometer at an initial status, connect it to termi-
nal 10.
Change the input specifications with Pr. 73
when connecting it to terminal
10E.
(Refer to
section 6.20.3.)
Recommended potentiometer: 1 k
Ω
, 2 W lin-
ear, multi turn potentiometer
10V DC ± 0,4V,
Permissible
load current
10mA
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10
(Output volt-
age
5V DC)
5,2V DC ± 0,2V,
Permissible
load current
10mA
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2
Frequency setting
(voltage)
Inputting 0 to 5VDC (or 0 to 10V, 0/4 to 20mA)
provides the maximum output frequency at 5V
(10V, 20mA) and makes input and output pro-
portional. Use Pr. 73 to switch from among
input 0 to 5VDC (initial setting), 0 to 10VDC,
and 0 to 20mA. Set the voltage/current input
switch in the ON position to select current
input (0 to 20mA).
Voltage input:
Input resist-
ance:
10k
Ω
± 1k
Ω
Maximum
permissible
voltage:
20V DC
Current input:
Input resist-
ance:
245
Ω
± 5
Ω
(while power is
on)
Maximum
permissible
current: 30mA
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4
Frequency setting
(current)
Inputting 0/4 to 20mA DC (or 0 to 5V, 0 to 10V)
provides the maximum output frequency at
20mA (5V, 10V) makes input and output pro-
portional. This input signal is valid only when
the AU signal is on (terminal 2 input is invalid).
Use Pr. 267 to switch between the input 0 to
20mA (initial value) and 0 to 5V DC, 0 to 10V DC.
Set the voltage/current input switch in the OFF
position to select voltage input (0 to 5V/0 to 10V).
Use Pr. 858 to switch terminal functions.
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Tab. 3-6: Input signals (2)