Basler Electric SMC-250 - Manual (Page 2)

terminals. Switch and contact inputs are commonly
used for start and stop control of the SMC-250,
setpoint adjustment, and operating mode control.
System indications are provided through output
contacts from the DECS-250, BE1-11m, and BE3-
74SD. Output contact connections are made at the
plate/chassis terminal blocks.
External Accessories
Optional, external accessories include an Analog
Expansion Module (AEM-2020), a Contact Expansion
Module (CEM-2020), an RTD Module, and an
Interactive Display Panel (IDP-800).
Analog Expansion Module (AEM-2020)
DECS-250 inputs and outputs may be augmented
with the following analog inputs and outputs of the
AEM-2020:
•
Eight analog inputs
•
Eight RTD (resistance temperature detector)
inputs
•
Two thermocouple (temperature) inputs
•
Four analog outputs
AEM-2020 input and output states are communicated
to and from the DECS-250 via CANbus. Input
thresholds can be configured and programmed using
BESTCOMSPlus
® and BESTlogic™Plus. Outputs are
intended to drive external, analog meters and can be
configured for indication of motor values and other
parameters.
AEM-2020 details and specifications are provided in
the DECS-250 instruction manual (Basler publication
9440300990).
Contact Expansion Module (CEM-2020/CEM-2020H)
The CEM-2020 or CEM-2020H can be specified to
provide the following additional combinations of
DECS-250 contact inputs and outputs:
•
Ten contact inputs
•
Eighteen contact outputs (CEM-2020H) or
twenty-four contact outputs (CEM-2020)
CEM-2020 input and output contact states are
communicated to and from the DECS-250 via
CANbus. Input and output functions are assigned
using BESTlogic™Plus.
RTD Module
BE1-11m RTD (resistance temperature detector)
inputs, analog inputs, and analog outputs can be
augmented with the available RTD module. The RTD
module provides:
•
Twelve RTD inputs
•
Four analog inputs
•
Four analog outputs
Each RTD input is configurable to protect against
high or low motor temperatures. Programmable over
and under thresholds for the analog inputs can be
used to trigger a protection element within the
BE1-11m. The analog outputs can be configured to
provide real-time metering of individual motor
parameters.
RTD module details and specifications are provided
in the BE1-11m instruction manual (Basler publication
9424200996).
Interactive Display Panel (IDP-800)
A 7.5-inch (19-centimeter) touch-panel can be
installed locally or remotely to:
•
View analog and digital system parameters
•
Configure motor control, limiter, and protection
settings
•
Download system data recorded by the
DECS-250
Details about the IDP-800 are available in Basler
publication 9437600990.
SYSTEM ELEMENTS
Interconnected SMC-250 system elements work
together to supply regulated excitation power to the
field and protect the controlled equipment. All
excitation system element connections are illustrated
on the system interconnection diagrams.
Inputs and Outputs
SMC-250 inputs and outputs consist of power and
sensing inputs, control inputs and outputs, the field
output, and communication ports. For input and
output connections, refer to the appropriate
interconnection diagram provided with this
publication.
Control Power
Control power is determined by the SMC-250 style
number and can be 120 Vac (style xxx1xxxx) or
24 Vdc (style xxx2xxxx). When 24 Vdc control power
is specified, the SMC-250 has a station power input
range of 85 to 264 Vac or 90 to 350 Vdc.
Operating Power
SMC-250 operating power is typically supplied by an
external PPT sized for the application.
Sensing Inputs
SMC-250 sensing voltage and sensing current are
supplied by external VTs and CTs configured to
supply three-phase sensing to the DECS-250 and
BE1-11m. The VTs and CTs must be sized
appropriately for the application and compatibility with
the SMC-250. The CTs may have a secondary rating
of 1 Aac (style xxxxx1xx) or 5 Aac (style xxxxx5xx).
Field Output
To obtain optimum metering resolution of the field
current, one of three field output ranges may be
specified to suit the application requirements, an
Publication
9494900994
Revision
A
Instructions
Date
10/14
Page
2 of 6