Sel -2505 Instruction Manual

SEL-2505 Remote I/O Module
Instruction Manual
Features, Benefits, and Applications
The SEL-2505 is a remote I/O module
that has eight contact inputs and eight
contact outputs. The status of these
inputs and outputs are communicated
between the SEL-2505 and host device
using M B ™ communica-
IRRORED ITS
tions over a dedicated fiber-optic port.
Each contact input controls one of the
eight M B transmit bits,
IRRORED ITS
while each of the eight received
M B controls a Form C
IRRORED ITS
output contact. Use the transmitted
contact input status for control and
indication of a remote device.
Communications Ability


helps you simplify and
improve existing or new
installations.
Add bus protection using

existing relay contact
inputs and outputs.
Add simple pilot

communications to existing two- or three-terminal line applications.
Isolate relay and breaker dc supplies for breaker failure trip distribution schemes.

Replace control wiring to outside cabinets with fiber to reduce dc ground exposure.

Add local or remote trip and close coil monitoring capabilities.

Compact Size permits panel-mount replacement of existing auxiliary relays.


Self-Testing increases reliability of auxiliary relay functions.


Simple Diagnostics consisting of 22 LEDs that indicate contact input, output, channel, and


device status.
Fiber Optics and Channel Monitoring increase scheme security.


Three Models provide a wide range of applicable communication paths: 650 nm multimode


fiber for communications paths ≤ 500 m, 850 nm multimode fiber for paths ≤ 15 km, or 1300 nm
single-mode fiber for paths ≤ 80 km.
Fast Operating Speed compares with high-speed auxiliary relays.


Date Code 20010214
SEL-2505 Remote I/O Module