Date Code 20010827
SEL-2594 Contact Transfer Module
SEL-2594 Contact Transfer Module
Instruction Manual
i3346a
The SEL-2594 transfers contact status for
control, alarm or protective relay transfer trip
commands (teleprotection). The SEL-2594
provides eight contact inputs and eight
contact outputs. The contact input status of
one SEL-2594 is transferred to another
SEL-2594 contact output through IEEE
C37.94 compliant channels over digital
multiplexers. Prior to this interface,
connections between teleprotection
equipment and multiplexers have been
electrical only. Because low energy signal
interfaces are susceptible to electromagnetic
interference (EMI) and ground loops, the
fiber optics interface eliminates data
corruption due to these conditions.
➤
Isolation
Fiber optic connections
provide isolation and prevent ground
loops associated with electric
communications cables.
➤
Immunity
Fiber optics provide
immunity to radiated and induced voltages associated with control wiring.
➤
Simple
LEDs indicate the state of inputs, contact outputs and channel status. All settings are
made with a control switch—PC software is not required.
➤
Secure
16 user selectable addresses for transmit and receive allows up to 240 unique address
combinations.
➤
High Speed
The SEL-2594 uses one 64-kilobit time slot in a digital multiplexer, and provides 8
millisecond back-to-back operate time.
1 to 8
Contact Inputs
1 to 8
Contact Outputs
SEL-2594
Contact
Transfer
Module
SEL-2594
Contact
Transfer
Module
Digital
Network
Up to 2 km of
multimode fiber
Digital
Multiplexer
C37.94 Compliant
Channel Card
Digital
Multiplexer
C37.94 Compliant
Channel Card
Features, Benefits, and Applications
