Features:
- IS200ISBEH1A converts ISBus traffic between RS-485 electrical and fiber-optic media.
- An interlock-controlled relay keeps an unpowered node from opening the communication ring.
- Separate optical, electrical, and power connectors divide the board's interface boundaries.
IS200ISBEH1A supports inter-panel ISBus communication where the standard shielded-pair transceiver path must continue over fiber.
The relay logic in IS200ISBEH1A handles both normal full-duplex routing and the bypass state created by loss of relay power or an open interlock.
Four indicators on IS200ISBEH1A let an operator distinguish module power, incoming transmit activity, interlock state, and valid optical carrier detection.
The General Electric IS200ISBEH1A ISBus Extender Board may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
General Electric IS200ISBEH1A ISBus Extender Board Manuals, Datasheets, Links
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Electrical and Optical Path
- Electrical side: The full-duplex interface uses differential RS-485 signals.
- Transmit path: Electrical input is converted to the fiber-optic output.
- Receive path: Optical input is converted back to differential electrical data.
- Data timing: The receive route includes retiming before the electrical output.
Ring Continuity Logic
- Normal state: Powered relay contacts connect the source to the optical ISBus path.
- Interlock: The relay also requires a closed interlock connection.
- Power-loss state: Normal source transmit and receive connections are interrupted.
- Bypass route: Converted optical receive data is coupled to the optical transmitter.
Interface Assignment
- P1A: This connector carries the full-duplex electrical interface and relay interlock.
- P1B: The auxiliary connector accepts a separate RS-485 transmit input.
- U5/U9: ST connectors provide optical receive and transmit interfaces respectively.
- Module supply: Active electronics use an independent 24 Vdc power input.
Four Visual States
- POWER: The green LED confirms 24 Vdc at the board electronics.
- XMIT DATA IN: The yellow LED follows electrical transmit activity.
- INTERLOCK ACTIVE: A green LED reports relay-interlock power.
- DETECT: The remaining green LED indicates valid optical input carrier.