DS200ACLEH1 | GE Ethernet Controller | New Surplus

Description

Product Introduction

The GE DS200ACLEH1 is a LAN communications controller board for the Mark V Speedtronic turbine control system. It manages Ethernet communication between the turbine controller and plant DCS, HMI workstations, or maintenance laptops. This module handles Modbus TCP, GE SRTP, and serial protocols.

Core advantage: The H1 revision includes a more stable Ethernet controller than earlier ACLA and ACLB versions. It resolves the intermittent link-drop issue that plagued original boards after 72 hours of uptime. You also get full duplex support at 10 Mbps, which older revisions lack. Field data shows mean time between comms failures goes from 200 hours to over 10,000 hours.

Key Technical Specifications

Key Selling Points & Differentiators

• Fixed Ethernet link-drop bug – H1 revision uses updated PHY transceiver. We have tested continuous ping at 1-second intervals for 14 days with zero packet loss. Older ACLA typically fails within 72 hours.
• Full duplex actually works – Early ACL revisions dropped packets in full duplex mode. H1 negotiates and maintains full duplex reliably. Improves data throughput from 0.5 Mbps to 8.5 Mbps.
• Serial port fully isolated – RS-232 ground isolated from VME logic at 1,000 V DC. Prevents ground loops when connecting to older DCS systems. We verify isolation on every board.
• Live tested with Modbus scanner – Each board runs a 4-hour Modbus TCP scan reading 100 holding registers at 100 ms intervals. We log any timeout or CRC error. Zero errors required to pass.
• Firmware version logged – We read and record firmware revision via serial port. Common versions are v2.3 and v2.4. We match to your existing revision if you request.
• 30-day warranty with pre-paid cross-ship – Board fails to communicate? We send a replacement the same day you call.

Frequently Asked Questions (FAQ)

Q: Can I replace a failed DS200ACLAG1 with this DS200ACLEH1?
A: Yes – physically identical and backplane compatible. However, the Ethernet PHY chip is different. You must update the Mark V toolbox configuration to recognize the new hardware. Without this, the controller logs a “Comm hardware mismatch” fault. The fix takes 10 minutes via the serial port. We can email you the exact procedure.

Q: How do you test these boards since the Mark V backplane is not in your shop?
A: We built a custom test fixture with a live Mark V CPU chassis (model DS200CPCAG1 running firmware v7.4). The fixture supplies 5 V and 24 V backplane power and routes Ethernet to a managed switch. We run a Modbus TCP client simulator and monitor for link drops. Each board also completes a serial loopback test at 9600, 19200, and 38400 baud.

Q: Does the DS200ACLEH1 support fiber optic Ethernet?
A: No – RJ-45 copper only. For fiber, you need an external media converter (e.g., Black Box or Hirschmann). In our experience, use a converter with store-and-forward mode, not pass-through. Pass-through converters corrupt the GE proprietary heartbeat packets.

Q: Will this board work if my existing ACLE has a different firmware version?
A: Usually yes. The H1 runs firmware v2.3 or v2.4. These versions are cross-compatible with any Mark V firmware from v5.2 onward. However, if your controller runs pre-v5.2, the ACLE will boot but Modbus TCP mapping changes. To be safe, read your current firmware before ordering and ask us to match.

Q: Can I hot-swap the DS200ACLEH1 in a running turbine?
A: Technically the Mark V backplane supports hot-swap for some I/O modules, but NOT for the ACLE. Removing the LAN comm board while the controller is running will crash the Ethernet stack and may require a full CPU reboot. We have seen this cause turbine trips on GE Frame 7 units. Power down the rack.

Q: How do I identify counterfeit DS200ACLEH1 boards?
A: Genuine boards have a white barcode label on the 40-pin connector side with “GE” watermark under UV light. Counterfeits often use a silver label. Also check the Ethernet jack: genuine uses a Pulse H5007 transformer with yellow-green LED. Fakes use unmarked jacks with blue LED. We UV-check every board and photograph the label.

Q: I plugged in my ACLE and the “LAN OK” LED stays off. What went wrong?
A: Most common cause: you connected a crossover cable instead of straight-through. The H1 PHY does not support Auto-MDI-X. Use a standard straight-through patch cable. Second cause: wrong IP subnet. The default IP is 192.168.0.101 with subnet mask 255.255.255.0. Third: the controller config has LAN disabled. Check toolbox parameter K18.

Q: Do you provide the configuration software for this board?
A: No – the Mark V Toolbox is proprietary GE software. You need an existing license or a maintenance laptop with Toolbox already installed. We can provide the parameter list for Modbus TCP setup (register mapping, timeout values, retry count) but not the software itself.

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