SEL-487E-3, -4 Data Sheet Schweitzer Engineering Laboratories, Inc.
24
Interface Board (I/O) Options
Select from four interface boards to provide flexibility
with the diverse I/O requirements when installing the
SEL-487E at power plants, transmission and distribution
networks. You can install the interface boards in any
combination in the relay. Table 6 provides I/O informa-
tion about the main board and the four interface boards.
➤ Voltage ranges for the inputs on the main board as
well as for the inputs on the four interface boards
➢ 24 Vdc
➢ 48 Vdc
➢ 110 Vdc
➢ 125 Vdc
➢ 220 Vdc
➢ 250 Vdc
➤ Connector type
➢ Screw-terminal block inputs
➢ Connectorized
➤ Conformal coat
➢ Conformal coating provides an additional
barrier to harsh environments, such as high
humidity and airborne contaminants. See
selinc.com/conformalcoating/ for more
information.
➤ Power supply
➢ 24–48 Vdc
➢ 48–125 Vdc or 110–120 Vac
➢ 125–250 Vdc or 110–240 Vac
➤ Voltage channel options
➢ 300 V phase-to-neutral wye configuration PT
inputs
➢ Two three-phase, 8 Vac, C37.92-compliant LEA
inputs
Table 5 Supported 1 A/5 A Windings Combinations
(Sheet 1 of 2)
Windings S, T, U Windings W, X, IY1, IY2, IY3
Winding S = 5 A
Winding T = 5 A
Winding U = 5 A
Winding W = 5 A
Winding X = 5 A
Winding IY1, IY2, IY3 = 5 A, 5 A, 5 A
Winding S = 5 A
Winding T = 5 A
Winding U = 1 A
Winding W = 5 A
Winding X = 5 A
Winding IY1, IY2, IY3 = 5 A, 5 A, 1 A
Winding S = 5 A
Winding T = 1 A
Winding U = 1 A
Winding W = 5 A
Winding X = 5 A
Winding IY1, IY2, IY3 = 5 A, 1 A, 1 A
Winding S = 1 A
Winding T = 1 A
Winding U = 1 A
Winding W = 5 A
Winding X = 5 A
Winding IY1, IY2, IY3 = 1 A, 1 A, 1 A
Winding W = 1A
Winding X = 1A
Winding IY1, IY2, IY3 = 5 A, 5 A, 5 A
Winding W = 1 A
Winding X = 1 A
Winding IY1, IY2, IY3 = 5 A, 5 A, 1 A
Winding W = 1 A
Winding X = 1 A
Winding IY1, IY2, IY3 = 5 A, 1 A, 1 A
Winding W = 1 A
Winding X = 1 A
Winding IY1, IY2, IY3 = 1 A, 1 A, 1 A
Table 5 Supported 1 A/5 A Windings Combinations
(Sheet 2 of 2)
Windings S, T, U Windings W, X, IY1, IY2, IY3
Table 6 Main Board and Interface Board Information
Board Name Inputs Description Outputs Description
Main 5 Optoisolated, independent, level-sensitive 3 High-current interrupting, Form A
2 Optoisolated, common, level-sensitive 2 Standard Form A
3 Standard Form C
INT2 8 Optoisolated, independent, level-sensitive 13 Standard Form A
2 Standard Form C
INT4 18 Two sets of 9 common optoisolated, level-sensitive 6 High-speed, high-current interrupting, Form A
6 Optoisolated, independent, level-sensitive 2 Standard Form A
INT7 8 Optoisolated, independent, level-sensitive 13 High-current interrupting, Form A
2 Standard Form C
INT8 8 Optoisolated, independent, level-sensitive 8 High-speed, high-current interrupting, Form A
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