Wiring Control Circuit Terminals
2-19
* 1. 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.
* 2. When driving a reactive load such as a relay coil, always insert a flywheel diode as shown in Fig 2.18.
* 3. Use the photocoupler outputs when the minimum permissible load is 5 VDC or less and 10 mA or less.
Fig 2.18 Flywheel Diode Connection
Photo-
coupler
outputs
P1
Multi-Function PHC Output
1
Default: Zero-speed
Zero-speed level (b2-01) or below when on.
50 mA max at 48 VDC
*2
P2
Multi-Function PHC Output
2
Default: Frequency agreement detection
Frequency within 2 Hz of set frequency
when on.
PC
Photocoupler output common
for P1 and P2
-
P3
Multi-Function PHC Output
3
Default: Ready for operation when on.
C3
P4
Multi-Function PHC output 4 Default: FOUT frequency detected when on.
C4
Relay
outputs
MA
Fault Output Signal (NO con-
tact)
Fault when CLOSED across MA and MC
Fault when OPEN across MB and MC
Dry contacts
Contact capacity:
10 mA min. 1 A max at
250 VAC
10 mA min. 1 A max at
30 VDC
Minimum permissible
load: 5 VDC, 10 mA
*3
MB
Fault Output Signal (NC con-
tact)
MC
Relay contact output com-
mon
-
M1
Multi-function contact output
(NO contact)
Default: Operating
Operating when on across M1 and M2.
M2
Analog
moni-
tor out-
puts
FM
Multi-Function Analog Mon-
itor 1
Default: Output frequency
0 to 10 V/100% frequency
0 to +10 VDC ±5%
2 mA maxAM
Multi-Function Analog Mon-
itor 2
Default: Current monitor
5 V/MxC rated current
AC Analog common -
RS-
485/
422
R+
MEMOBUS Communica-
tions Input
For 2-wire RS-485, short R+ and S+ as well
as R- and S-.
Differential input, photo-
coupler isolation
R-
S+
MEMOBUS Communica-
tions Output
Differential output, pho-
tocoupler isolation
S-
IG Communications shield wire - -
Table 2.8 Control Circuit Terminals (Continued)
Type
No. Signal Name Function Signal Level
External power:
48 V max
Coil
Flywheel diode
50 mA max
The rating of the flywheel diode
must be at least as high as the
circuit voltage.
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