Mitsubishi Electric FR-CC2-P, Instruction Manual

Page: 44 / 184

Control circuit
INSTALLATION AND WIRING
43
2
2.7
Control circuit
2.7.1
Details on the control circuit terminals
The input signal function of the terminals in can be selected by setting Pr.178, Pr.187, Pr.189 to Pr.195 (I/O terminal
function selection) . (Refer to page 105 , 109 .)

Input signal
Ty
p
e Terminal
Symbol
Terminal name Terminal function description Rate Specification
Contact input
RES Reset
Use this signal to reset a fault output provided when a protective function is
activated. Turn ON the RES signal for 0.1 s or longer, then turn it OFF.
In the initial setting, reset is always enabled. Setting
Pr.75 makes reset
possible only after the occurrence of a converter unit fault. The converter
unit will restart about 1s after reset.
Input resistance 4.7 k

Voltage when contacts
are open: 21 to 27
VDC
When contacts are
short-circuited: 4 to 6
mADC
OH
External thermal relay
input
The external thermal relay input (OH) signal is used when using an
external thermal relay or a thermal protector built into the motor to protect
the motor from overheating.
When the thermal relay is activated, the inverter output is shut off by the
external thermal relay operation (E.OHT).
RDI Contact input
No function is assigned in the initial setting.
The function can be assigned by setting
Pr.178 .
SD
Contact input common
(sink)
Common terminal for contact input terminal (sink logic).
———
External transistor
common (source)
Connect this terminal to the power supply common terminal of a transistor
output (open collector output) device, such as a programmable controller,
in the source logic to avoid malfunction by undesirable current.
24 VDC power supply
common
Common terminal for the 24 VDC power supply (terminal PC, terminal
+24)
Isolated from terminals 5 and SE.
PC
External transistor
common (sink)
Connect this terminal to the power supply common terminal of a transistor
output (open collector output) device, such as a programmable controller,
in the source logic to avoid malfunction by undesirable current.
Power supply voltage
range 19.2 to 28.8
VDC
Permissible load
current 100 mA
Contact input common
(source)
Common terminal for contact input terminal (source logic).
24 VDC power supply
common
Can be used as a 24 VDC 0.1 A power supply.
Externa
l pow
er supply input +24
24 V external power
supply input
For connecting a 24 V external power supply.
If a 24 V external power supply is connected, power is supplied to the
control circuit while the main power circuit is OFF.
Input voltage 23 to
25.5 VDC
Input current 1.4 A or
less