Description
Key Technical Specifications
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Model Number: DS200SLCCG1ACC
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Manufacturer: General Electric
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Network Protocols: DLAN (drive LAN) & ARCNET token-pass, 2.5 Mbps
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Processor: 40 MHz LAN Control Processor (LCP) with 2 × detachable EPROM memory modules
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Memory: 8 k × 16 dual-port RAM shared with SDCC; 64 k × 16 EPROM (each)
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Isolation: 1500 Vdc port-to-port; 2.5 kV optical on fiber option
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Front-Panel Ports: RJ-45 10/100 Ethernet (late builds), 9-pin RS-232 (TIMN), 16-char alphanumeric keypad connector
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Power Demand: +5 V @ 0.8 A, +15 V @ 0.2 A from rack 2PL bus
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Indicators: 6-status LED bank (ARCNET, DLAN, ERR, LCP RUN, MEM, FAULT)
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Operating Temperature: –20 °C to +70 °C board rating
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Board Size: 140 × 85 × 25 mm, 0.25 kg
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Manual: GEI-100162 (LAN Communications Card)
DS200SLCCG1ACC
Field Application & Problem Solved
In a 7EA peaker the EX2000 exciter needs to push real-time volts, amps, and fault bits up to the Mark V DCS without rebuilding the whole rack. This card is the bridge. It sits in slot 3, talks token-ring ARCNET to the turbine panel, and pumps DLAN frames down to the SDCC control card. With both isolated and non-isolated sides you can tie into a fiber ARCNET highway on the turbine side while keeping a copper DLAN stub local to the drive—no extra repeaters, no fiber converters that fail every summer. The LCP filters and checksums every frame so a noisy compressor VFD next door can’t corrupt your exciter reference. End result: operators get real-time field current and diode health on their Ovation screens without touching legacy Genius buses.
In a 7EA peaker the EX2000 exciter needs to push real-time volts, amps, and fault bits up to the Mark V DCS without rebuilding the whole rack. This card is the bridge. It sits in slot 3, talks token-ring ARCNET to the turbine panel, and pumps DLAN frames down to the SDCC control card. With both isolated and non-isolated sides you can tie into a fiber ARCNET highway on the turbine side while keeping a copper DLAN stub local to the drive—no extra repeaters, no fiber converters that fail every summer. The LCP filters and checksums every frame so a noisy compressor VFD next door can’t corrupt your exciter reference. End result: operators get real-time field current and diode health on their Ovation screens without touching legacy Genius buses.
Installation & Maintenance Pitfalls (Expert Tips)
EPROMs walk off
The two EPROMs are in machined sockets. Vibration works them loose after ten years. Power-down reseat once per outage or you’ll chase phantom “LCP PARITY” faults.
EPROMs walk off
The two EPROMs are in machined sockets. Vibration works them loose after ten years. Power-down reseat once per outage or you’ll chase phantom “LCP PARITY” faults.
ST fiber bend radius is 1.5 in—no exceptions
Sharp kinks add 3 dB loss; the ARCNET token drops and the whole link collapses. Use the orange plastic guide riveted to the bulkhead and zip-tie every 6 in.
Sharp kinks add 3 dB loss; the ARCNET token drops and the whole link collapses. Use the orange plastic guide riveted to the bulkhead and zip-tie every 6 in.
RJ-45 shield is live at 5 V potential
The RJ-45 shield is tied to board 0 V, which floats 5 V above earth. If you plug in a laptop with a grounded NIC you’ll short 5 V through the cable and blow the PHY. Use an isolated USB-Ethernet adapter or fiber media converter.
The RJ-45 shield is tied to board 0 V, which floats 5 V above earth. If you plug in a laptop with a grounded NIC you’ll short 5 V through the cable and blow the PHY. Use an isolated USB-Ethernet adapter or fiber media converter.
Keypad cable is fragile
The 10-pin ribbon for the alpha keypad is not keyed. Reverse it and you short +5 V to frame ground—blown LCP regulator inside the SLCC. Line up the triangle mark with the silk-screen; never rock the plug side-to-side.
The 10-pin ribbon for the alpha keypad is not keyed. Reverse it and you short +5 V to frame ground—blown LCP regulator inside the SLCC. Line up the triangle mark with the silk-screen; never rock the plug side-to-side.
DS200SLCCG1ACC
Technical Deep Dive & Overview
DS200SLCCG1ACC is a dedicated network coprocessor on a single Euro-card. The 40 MHz LCP runs a trimmed-down ARCNET stack in ROM; it receives token frames, strips the CRC, and shoves data into dual-port RAM that the SDCC master DSP reads during its 2 ms scan. DLAN side uses coax carrier-sense with bit-stuffing—old but deterministic, which is why GE kept it in steel mills where Ethernet collisions would kill you. Because all timing is done in hardware, you can swap the card with the drive spinning; the LCP re-acquires token in < 150 ms and the process never sees the hiccup
DS200SLCCG1ACC is a dedicated network coprocessor on a single Euro-card. The 40 MHz LCP runs a trimmed-down ARCNET stack in ROM; it receives token frames, strips the CRC, and shoves data into dual-port RAM that the SDCC master DSP reads during its 2 ms scan. DLAN side uses coax carrier-sense with bit-stuffing—old but deterministic, which is why GE kept it in steel mills where Ethernet collisions would kill you. Because all timing is done in hardware, you can swap the card with the drive spinning; the LCP re-acquires token in < 150 ms and the process never sees the hiccup
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