Digital guide
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Detailed content
Technical Specifications:
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Logic Input: 5 V DC ±5 % (from 40-pin ribbon)
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Coil Drive Output: 30–40 V DC, up to 3 A per channel; 105 V DC pulse (250 ms) for fast pick-up
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Channels: 12 independent solid-state driver channels
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Isolation: 1500 V AC optical isolation (input to output)
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Action Time: ≤ 2 ms pick-up / drop-out
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Board Power: 75–149 V AC/DC auxiliary, 28 V DC hold supply
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Temperature: −30 °C to +65 °C (industrial grade)
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Dimensions: 159 × 178 mm (6.26 × 7.01 in), 6U Eurocard
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Mounting: Mark V rack, 96-pin backplane + terminal block
Functional Features: JP2 sync jumper allows 1–8 boards to close contactors with zero time-skew; on-board test points (REFA, +15 V, coil current); green IMOK / red FAIL LEDs; solid-state output replaces mechanical interposing relays.
Working Principle: 5 V logic → high-speed opto-coupler → MOSFET/IGBT stage → contacts. Pulse-and-hold algorithm reduces coil heating by ~40 %.
Application Scenarios: GE 6B/7FA/9E gas turbine exciter field break, DC link quick-disconnect, emergency magnetic trip, Mark V→VI retrofit.
Installation & Notes: Use twisted/shielded coil wires; set JP2 before energizing; do not exceed 40 V coil rating; verify 1500 V isolation before rack insertion.
