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AMPGARD RVSS
Reduced Voltage Soft-Starter
User Manual
When an MPR is furnished, its inputs are included in the wiring for
voltage feedback from the starter potential transformer and current
feedback from the output CTs. MPR power is provided from the
starter Control Power Transformer control bus.
The Motor Protective Relay output signals to the RVSS are shown
on the schematic diagram, with instructions on how to configure
the MPR and how its signals are to be used in the RVSS CR relay
field-wire ladder logic rung. See how an MPR is applied in the RVSS
schematic in Figure 10.
6.6
Auxiliary interlocks
Auxiliary interlocks from the control circuit are provided for customer
use, wired to the Customer Terminal Board. These signals include
•
Main Contactor status (MAX)
•
RVSS Fault relay status (TRPX)
•
MPR status (one programmable, one critical fault status, Form
C)
CARE MUST BE TAKEN TO ENSURE THAT THERE IS NO CONFLICT
BETWEEN ALARM OR TRIP SETTINGS CONFIGURED IN THE MPR AND
ALARM OR TRIP SETTINGS CONFIGURED IN THE RVSS.
WHEN BOTH THE MPR AND RVSS PROTECTIONS ARE SET FOR SIMILAR
BEHAVIOR, THEY CAN INTRODUCE CONFLICTS WHEN TROUBLESHOOTING
THE RVSS SYSTEM.
6.7
System control elements
6.7.1
Base control module
The C445 Base Control Module (BCM) interfaces the I/O Board,
Monitoring User Interface (MUI), and external communications. It
also serves as the logic processor for Power Factor Correction (PFC)
capacitor control (when furnished).
The Base Control Module is located in the RVSS low voltage
compartment and powered by the RVSS electronics 24 VDC power
supply. It has indicating LEDs on its front for status display. See
Figure 22 and Figure 34.
Figure 34.
Base control module (BCM).
Front View
DIP
Switches
P2
P1
Test/Reset
The Base Control Module (BCM) provides the following features for
the AMPGARD RVSS:
Integrated Micro USB port for in Control PC application
•
Real-time clock and memory backup module option slot. Provides battery backed-up
•
fault time stamping and non-volatile for configurable parameters
Provides power and communications to the Monitoring User Interface (MUI) through
•
the cable connection
Provides communications to the I/O Board and Digital Signal Processor (DSP)
•
DIP Switches: Used for node addressing and configuration selections.
•
Status LEDs:
•
Status - indicates the fault and warning status of the Base Control Module
¤
CH1 - indicates status of the Monitoring User Interface connected to the Channel
¤
1 port on the BCM
CH2 - indicates status of the I/O Board connected to the Channel 2 port on the
¤
BCM
USB - indicates communications traffic on the USB port
¤
Communication Card: Ethernet for Modbus/TCP and
•
EtherNet/IP communications.
6.7.2
BCM LED status indications
Figure 35 summarizes the BCM states indicated by the Status
LEDs, and highlights the Ethernet card module status and network
status indicators.
The Ethernet Card includes indicators for the module status (MS)
and Network Status (NS). The Module Status Indicator states are
described in Table 6 and Table 7 below.
Ethernet
Communication
Module
NS
MS
Status LED
CH 1 LED
CH 2 LED
Input
Power
Serial Comm.
Micro USB Port
Instruction Booklet IB020003EN
Effective January 2021
Bottom View
RS-485
CH1 Port
(to MUI)
CH2 Port
(to BCM)
EATON www.eaton.com
37
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