1.3
Date Code 20080918 Instruction Manual SEL-749M Relay
Introduction and Specifications
Models, Options, and Accessories
Models, Options, and Accessories
Models
Complete ordering information is not provided in this instruction manual. See
the latest SEL-749M Model Option Table at www.selinc.com, under SEL
Literature, Ordering Information (Model Option Tables).
Base Model
The SEL-749M base model has the following features:
➤ Front panel with LCD display, eight target LEDs (six program-
mable), operator control interface, and EIA-232 serial port
➤ Processor and communications card (Slot B) with EIA-232
serial port, multimode (ST) fiber-optic serial port (receive
only), and IRIG-B time code input or PTC (thermistor) input
➤ Power supply card with two digital inputs and three output
contacts (Slot A)
➤ IA, IB, IC, and IN current inputs card
➤ ACSELERATOR QuickSet
®
SEL-5030 Software
➤ User-configurable labels
➤ Protocols include Modbus RTU, SEL ASCII, SEL Compressed
ASCII, SEL Fast Meter, SEL Fast Operate, SEL Fast SER, SEL
Fast Message
➤ Three expansion card slots
Options
The SEL-749M has the following options:
➤ Voltage Option (Slot E): four-wire wye or open-delta connected
VTs.
➤ Input/Output (I/O) Option (Slot D): one 4–20 mA analog
(transducer) output, three additional control inputs, and four
additional contact outputs.
➤ Input/Output (I/O) Option (Slot C): eight additional digital
inputs.
➤ Communications Options (Protocol/Ports; Slot C):
➢ Modbus
®
RTU protocol and EIA-485/EIA-232 ports
➢ DeviceNet
➤ Choice of IRIG-B time-code input or PTC (thermistor) input on
Terminals B01–B02. (IRIG-B input at Port 3 is unavailable
with PTC option.)
➤ Choice of high voltage supply (110–240 Vac or 110–250 Vdc)
or low voltage supply (24-48 Vdc).
Courtesy of NationalSwitchgear.com
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