2-21
Table 2.7 Symbols, Names and Functions of the Control Circuit Terminals (Continued)
Cla
s
s
ifi
-
c
a
ti
o
n
Symbol
Name
Functions
Dig
ita
l i
n
p
u
t
[EN1]
[EN2]
Enable inputs
(1) Turning off the circuit between terminals [EN1] and [PLC] or terminals [EN2] and [PLC]
stops the inverter's output transistor. (Safe Torque Off: STO)
(2) These terminals are exclusively used for the source mode input and cannot be switched to
the sink mode.
(3) If either one of these input terminals is kept OFF for 50 ms or more, the inverter interprets it
as a discrepancy, causing an alarm
ecf
. This alarm state can be cleared only by turning the
inverter power off and on clears this alarm.
For details of connection to this terminal and precautions, refer to User Manual Chapter 9,
Section 9.4 "Compliance with EN954-1, Category 3."
<Terminal [EN1] [EN2] circuit specification>
[PLC]
Photocoupler
[CM]
<Control circuit>
5.4k
+24 VDC
[EN1]
5.4k
[EN2]
[PLC]
PLC signal
power
(1) Connects to the power supply of PLC output signals.
Rated voltage: +24 VDC (Allowable range: +22 to +27 VDC), Maximum 100 mA DC
(2) This terminal also supplies power to the load connected to the transistor output terminals.
Refer to "Transistor output" described later in this table for more.
[CM]
Digital input
common
Common terminal for digital input signals
This terminal is electrically isolated from the terminals [11]s and [CMY].
Using a relay contact to turn [X1] to [X7], [FWD], or [REV] ON or OFF
Figure 2.14 shows two examples of a circuit that uses a relay contact to turn control signal input [X1] to [X7],
[FWD], or [REV] ON or OFF. In circuit (a), the slide switch SW1 is turned to SINK, whereas in circuit (b) it is turned
to SOURCE.
Note:
To configure this kind of circuit, use a highly reliable relay.
[PLC]
Photocoupler
[CM]
<Control circuit>
[X1]
t o
[X7],
[FWD], [REV]
+
2
4
V
D
C
SOURCE
SINK
[PLC]
Photocoupler
[CM]
<Control circuit>
[X1] to [X7],
[FWD], [REV]
+
2
4
V
D
C
SOURCE
SINK
(a) With the switch turned to SINK
(b) With the switch turned to SOURCE
Figure 2.14 Circuit Configuration Using a Relay Contact
Using a programmable logic controller (PLC) to turn [X1] to [X7], [FWD], or [REV] ON or OFF
Figure 2.15 shows two examples of a circuit that uses a programmable logic controller (PLC) to turn control signal
input [X1] to [X7], [FWD], or [REV] ON or OFF. In circuit (a), the slide switch SW1 is turned to SINK, whereas in
circuit (b) it is turned to SOURCE.
In circuit (a) below, short-circuiting or opening the transistor's open collector circuit in the PLC using an external
power supply turns ON or OFF control signal [X1] to [X7], [FWD], or [REV]. When using this type of circuit, observe
the following:
- Connect the + node of the external power supply (which should be isolated from the PLC's power) to terminal
[PLC] of the inverter.
- Do not connect terminal [CM] of the inverter to the common terminal of the PLC.
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