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24 Rockwell Automation Publication 150-QS003D-EN-P - November 2013
Chapter 2 Installation
Additional Options
Optional Cat. No. 150-SM2 Positive Temperature Coefficient (PTC),
Ground-Fault, & External Current Transformer Option Module
An optional Cat. No. 150-SM2 module provides connectivity to external PTC
motor winding temperature sensors, ground-fault, and current transformer
sensors.
The 150-SM2 module can be located in control module Port 7 or 8. Only one
150-SM2 module is allowed to be used with the control module (See Figure 12
).
All of the individual terminal blocks (TB2, TB3, and TB4) are removable. The
RG25U female connector provides a connection point for the male-to-male cable
provided with the 825-MCM current sensor/converter module.
Figure 15 - Circuit Board
Current Feedback Sensor (825-MCM Converter Module)
External Bypass Operation
An external 825-MCM Current Sensing Converter Module may be required to
provide current feedback to the SMC-50 when it is used with an external bypass
contactor (bypass mode). The external current feedback is used for all current
measurement and current protection functions while the controller is in the
external bypass mode. In all other modes (e.g., starting, stopping, slow speed,
etc.), internal current feedback signals are used.
See Bypass Diagrams
on page 27 for a listing of components required for bypass
operation.
NOTE:
1 When installed in Control Module Port 7, the orientation of the module
terminals is rotated 180° along with its terminals.
2 The Cat. No. 150-SM2 Option Module can NOT be configured using a
150-SM6 PCM. This module can be configured using a 20-HIM-A6, network
card, or communications software (e.g., Connected Components Workbench
[CCW]).
RG25U
Female
TB3
TB3
150-SM2 Module Circuit Board
TB2
TB2
PTC
PTC
Ground Fault
Ground Fault
825-MCM
Cable
TB4
TB4
PTC & GF
Shield Wire
Control Ground