2-9
Table 2.5 Names, Symbols and Functions of the Control Circuit Terminals (continued)
Classifi-
cation
Name
Symbol
Functions
Digital
input
Enable input 1
Enable input 2
[EN1]
[EN2]
(1) Opening the circuit between terminals [EN1] and [PLC] or
terminals [EN2] and [PLC] stops the operation of the inverter
output transistorby STO functional safety function according to
IEC/EN 61800-5-2.
(2) The input mode of terminals [EN1] and [EN2] is fixed at the
SOURCE mode. No switching to the SINK mode is possible.
(3) If either one of [EN1] and [EN2] is OFF, an alarm occurs. (ECF
alarm)
This alarm state can be cleared only by turning the
inverter power off and on.
<Enable input circuit specifications>
P
[PLC]
[EN1]
5.4
k
Ω
5.4
k
Ω
[CM]
+24 VDC
Photocoupler
<Control circuit>
[EN2]
PLC signal power
[PLC]
Connects to the output signal power supply of Programmable Logic
Controller (PLC).
Rated voltage: 24 VDC (Allowable range: +22 to +27 VDC),
Maximum output current 100 mA DC
Digital input common
[CM]
Common terminals for digital input signals
Item
Min.
Max.
Operating voltage
ON level
22 V
27 V
OFF level
0 V
2 V
Operating current at ON
(Input voltage is at 27 V)
2.5 mA
5 mA
Allowable leakage current at OFF
−
0.5 mA
Содержание FRENIC-Lift LM2A Series
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