Rockwell Automation 150-SM2 SMC-50 Soft Starter PTC, Ground and Current Feedback Option Module - Manual (Page 3)

PN-164973
DIR 10000152877 (Version 02)
Publication 150-IN051C-EN-E
Electrical Ratings
PTC Input Ratings
Response Time
Response Resistance
Reset Resistance
3400 Ω ± 150 Ω
1600
Ω ± 100 Ω
1600
Ω
800 ms
25
Ω ± 10 Ω
< 7.5V
30V
6
Short-Circuit Trip Resistance
Max. Voltage at PTC Terminals (R = 4 k
Ω)
Max. Voltage at PTC Terminals (R = open )
Max. Cold Resistance of PTC Sensor Chain
Max. No. of Sensors (Connected in Series)
PTC
PTC
Field Wiring Terminal Identification
PTC Sensor Specifications
M
T1/2
T2/4
T3/6
L1/1
L2/3
L3/5
(1)
Fast-acting
SCR fuses
Optional
Circuit
Branch
Protection
RG25U
Female
150-SM2
TB4
TB4
TB3
TB3
TB2
TB2 RG25U
Male
Motor PTC
Sensor
Cable
825-MCMxx Cable
SMC-50
825-CBCT Ground
Fault Core Balance
Sensor
Bla
ck
W
hite
Shie
ld
Shield
Shield
To Control Module
Terminal #3
Ground
External Bypass
1 2 1 2
825-MC
Mxx 1 2
(1)(2)
Footnotes
(1)
(1)
(1)
(1) (3)
(1)(4)
NOTE:
For additional information refer to the SMC-50 User Manual (150-UM011_-EN-P) available from
ab.com, Publications Library.
(3)
(1) Customer Supplied
(2) The 825-MCMxxx can be used with or without an external bypass contactor. If an external bypass
contactor is used then the 825-MCMxxx must be installed in order to use current based motor protection
features including the motor overload feature. Cable length is 3 meters. Only the cable provided with the
825-MCMXXX is compatible with the 150-SM2.
(3) The 825-CBCT core balance sensor mounts separately from the SMC-50 and must be placed within
3 meters of it. When connecting the 825-CBCT ground fault sensor the secondary of the CT must be
shorted until connection to the 150-SM2 module is complete.
(4) Refer to the User Manual for additional bypass configurations (e.g. emergency run off bypass) and
application considerations.
WARNING: The ground fault sensing feature of the SMC-50 is intended for monitoring purposes only and not as a
ground fault circuit interrupter for personnel protection as defined in Article 100 of the NEC and has not been
evaluated to UL 1053.