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SEL-2594 Contact Transfer Module
Instruction Manual
Features, Benefits, and Applications
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.
SEL-2594
Contact
Transfer
1 to 8
Contact Inputs
Module
Up to 2 km of
multimode fiber
Date Code 20010827
Digital
Digital
Multiplexer
Network
C37.94 Compliant
Channel Card
i3346a
Digital
SEL-2594
Multiplexer
Transfer
C37.94 Compliant
Channel Card
1 to 8
Contact Outputs
Contact
Module
SEL-2594 Contact Transfer Module
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Related Manuals for Schweitzer Engineering Laboratories SEL-2594
Summary of Contents for Schweitzer Engineering Laboratories SEL-2594
- Page 1 ➤ 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. Digital SEL-2594...
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Page 2: Product Overview
Product Overview Product Overview Figure 1 provides a functional overview of the SEL-2594. Large +85˚C range for –40˚C installing outdoors. All terminals are clearly numbered. Wide range power supply consumes less than Screw 5 watts. terminals accept ring Alarm contacts... - Page 3 Figure 2 The SEL-2594 Is a Low-Cost Teleprotection System for Use with IEEE C37.94 Compliant Digital Multiplexers SCADA Use the SEL-2594 to extend the reach of SCADA Remote Terminal Units (RTU). Communicate control and alarm points between remote circuit breakers/circuit switchers and RTUs via the SEL-2594.
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Page 4: Functional Description
1–4. The completed transmit payload packet is sent to the C37.94 framer section. The C37.94 framer section formats the payload data into a transport frame that is used between the SEL-2594 and the multiplexer channel card. This frame is transmitted at 2.048 megabits per second and includes header and overhead bits, per IEEE Standard C37.94. -
Page 5: Configuring The Sel-2594
Configuring the SEL-2594 Configuring the SEL-2594 The SEL-2594 has a 10 position dip switch to set the transmit address, receive address and timing mode as shown in Figure 6. 10 9 8 5 4 3 2 Switch No. Function 1—4 Transmit Address (TX) 5—8... -
Page 6: Setting The Timing Mode
SEL-2594 SEL-2594 to the RX ST connector on the multiplexer channel card, and to a Multiplexer connect the RX ST connector on the SEL-2594 to the TX ST connector on the multiplexer channel card, as shown in Figure 7. Multiplexer... -
Page 7: Testing The Sel-2594
Figure 8 on page 8 illustrates the operation of the yellow alarm bit and LED. A yellow alarm is a remote receive alarm communicated from the local channel card to the local SEL-2594 via a predefined alarm bit in the frame. A yellow alarm is declared when the local multiplexer channel card is not receiving data from the local SEL-2594. -
Page 8: Led Indications
OUT1 through OUT8 indicate that the applied to the corresponding contact contact output associated with that input terminals. LED is energized. TX LED indicates the SEL-2594 is RX LED indicates receipt of valid transmitting data. C37.94 transport frames. A red ALARM LED indicates that DATA... -
Page 9: Sel-2594 Operating Time Performance
SEL-2594 Operating Time Performance Figure 9 depicts the time to transfer a contact closure between a local and remote SEL-2594. This figure includes a nominal 0.5 millisecond multiplexer through delay. Actual through delay will vary depending on multiplexer type and network configuration. -
Page 10: Mechanical Diagram
Mechanical Diagram Mechanical Diagram Figure 10 SEL-2594 Dimensions and Drill Diagram SEL-2594 Contact Transfer Module Date Code 20010827... -
Page 11: Specifications
Optical Fiber Optical 2 km Fiber Core Size Budget 820 nm Typical Attenuation 50 µm 9.0 dB 5.6 dB (margin = 3.4 dB) 62.5 µm 13.0 dB 6.2 dB (margin = 6.8 dB) SEL-2594 Contact Transfer Module Date Code 20010827... - Page 12 , Connectorized, Job Done, SEL-PROFILE, and OGIC registered trademarks of Schweitzer Engineering Laboratories. All brand or product names appearing 2350 NE Hopkins Court • Pullman, WA 99163-5603 • USA in this document are the trademark or registered trademark of their respective holders. U.S. and For- Phone: (509) 332-1890 •...
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