Eaton S611 - Introduction; Overview; General Appearance Notes

S611 Soft Starter MN03902011E—May 2012 www.eaton.com 1
Introduction
Overview
The S611 soft starter from Eaton’s electrical sector is an
electronic, self-contained, panel- or enclosure-mounted
motor soft-starting device. It is intended to provide
three-phase induction motors with a smooth start, both
mechanically and electrically. The S611 soft starters use six
SCRs composed of three SCR modules connected in a full
wave power bridge. Varying the SCR conduction period
controls the voltage applied to the motor. This in turn controls
the torque developed by the motor. After the motor reaches
speed, internal contacts are closed to bypass the SCRs.
The S611 has built-in communications capabilities via two
comms ports. Comms port A is a screw terminal block that is
used for Modbus
®
RS-485 communications or communication
to an EATON HMI. Comms port B uses a printed circuit
board (PCB) connector that interfaces with three different
communications adapters; PROFIBUS
®
, DeviceNet and
Modbus communications adapters. Modbus communication
may be accomplished via either comms port A and/or comms
port B. In the event that the communications adapter located
at comms port B adds excessive height to the S611, the
adapter may be mounted to the side of the S611 and wired
to comms port A using an L-Adapter in combination with the
Eaton brand communication adapters PROFIBUS, DeviceNet
and Modbus.
The S611 soft starter uses a User Interface Module (UI) that
allows the user to configure the device, read and write
system parameters, and evaluate fault codes for
troubleshooting. The UI includes an easy-to-read display and
keypad to scroll through the parameters. The user interface
module allows the user to modify control parameters, enable
or disable protections, set communication variables, monitor
system parameters such as line voltages and currents, and
access the fault queue.
The S611 is designed to fulfill the industrial service
requirements for applications such as chillers, pumps and
machine tools that require less than 85% of the motor’s
rated starting torque for worst case starting condition.
The S611 meets all relevant specifications set forth by
NEMA ICS 1, ICS 2 and ICS 5, UL 508, IEC 60947-4-2, and
CSA 22.2/14-05.
General Appearance Notes
S611 Soft Starter
Control Circuit Terminal Block (TB3)
Relay Terminal Block (TB2)
Control Power Terminal Block
(TB1)
User Interface
Module (UI)
Mounting
Locations (8)
Load Outputs
Comms Port B
(TB5)
Line Inputs
(Back of the Unit—Not Shown)
Comms Port A Terminal Block
(TB4)
www.comoso.com