![background image](http://html1.mh-extra.com/html/omron/i537-e2-01/i537-e2-01_user-manual_743212054.webp)
2
-24
Control Circuit Terminal Functions
The functions of the control circuit terminals are shown in Table 2.9. Use the appropriate terminals for the cor-
rect purposes.
* 1. The default settings are given for terminals S3 to S7. For a 3-wire sequence, the default settings are a 3-wire sequence for S5, multi-step speed setting 1
for S6 and multi-step speed setting 2 for S7.
Table 2.9 Control Circuit Terminals
Type
No.
Signal Name
Function
Signal Level
Se-
quence
input
signals
S1
Forward run/stop command
Forward run when ON; stopped when OFF.
24 VDC, 8 mA
Photo coupler isolation
S2
Reverse run/stop command
Reverse run when ON; stopped when OFF.
S3
External fault input
*1
Fault when ON.
Functions are
selected by set-
ting H1-01 to
H1-05.
S4
Fault reset
*
Reset when ON
S5
Multi-step speed reference
1
*1
(Master/auxiliary switch)
Auxiliary frequency ref-
erence when ON.
S6
Multi-step speed reference
2
*1
Multi-step setting 2 when
ON.
S7
Jog frequency reference
*1
Jog frequency when ON.
SC
Sequence input common
–
–
Analog
input
signals
+V
15 V power output
15 V power supply for analog references
15 V
(Max. current: 20 mA)
–V
–15 V power output
not used
–15 V
(Max. current: 20 mA)
A1
Frequency reference
0 to +10 V/100%
0 to +10 V(20 k
Ω
)
A2
Multi-function analog input
4 to 20 mA/100%
0 to +10 V/100%
Function is
selected by set-
ting H3-09.
4 to 20 mA(250
Ω
)
0 to +10 V(20k
Ω
)
AC
Analog reference common
–
–
E(G)
Shield wire, optional ground
line connection point
–
–
Se-
quence
output
signals
M1
Running signal
(1NO contact)
Operating when ON.
Multi-function
contact outputs
Dry contacts
Contact capacity:
1 A max. at 250 VAC
1 A max. at 30 VDC
M2
M3
Zero speed
Zero level (b2-01) or
below when ON
M4
MA
Fault output signal (SPDT)
Fault when CLOSED across MA and MC
Fault when OPEN across MB and MC
Dry contacts
Contact capacity:
1 A max. at 250 VAC
1 A max. at 30 VDC
MB
MC
Analog
output
signals
FM
Multi-function analog output
(frequency output)
0 to +10 V/100% fre-
quency
Multi-function
analog monitor 1
0 to +10 V max. ±5%
2 mA max.
AC
Analog common (copy)
–
AM
Multi-function analog output
(current monitor)
5 V/Inverter's rated cur-
rent
Multi-function
analog monitor 2
RS-
485/
422
R+
communications input
For 2-wire RS-485, short R+ and S+ as well
as R- and S-.
Differential input, PHC
isolation
R-
S+
communications output
Differential input, PHC
isolation
S-
IG
Signal common
-
-