GE IC3600STKJ1C – Speedtronic MK I/II Signal-Conditioning Board for Gas Turbine Control

The GE IC3600STKJ1C is a legacy Speedtronic control board used in MK I/II (and, in many cases, MK III retrofits) gas turbine panels. From my experience, this series of IC3600 boards serves as reliable signal-conditioning and logic interface hardware—designed to stabilize sensor signals and drive discrete logic on the Speedtronic backplane. You might notice that plants still running GE’s early Speedtronic architectures prefer original IC3600 cards like this because they drop in without re-engineering the cabinet or rewriting panel logic.

Typical use cases include restoring a spare slot for speed/auxiliary sensor processing, replacing a temperature or process-signal conditioning card that’s gone intermittent, or supporting a planned overhaul where the panel spec calls for IC3600 family continuity. One thing I appreciate is how predictable these boards behave once seated and cleaned—maintenance teams can usually verify function quickly with panel prints and a simple loop test.

Order Placement Process and Guarantees

• Step 1 – Part confirmation: Share your required part number and revision (IC3600STKJ1C). If you have a photo of the board edge connector or slot notes, that helps avoid mismatches.
• Step 2 – Quotation: We send pricing and the actual lead time (in-stock items typically ship within 1 week).
• Step 3 – Payment: 50% advance payment; full payment before delivery.
• Step 4 – Testing & packing: Functional checks and anti-static packing are performed prior to dispatch.
• Shipment: Express options include FedEx, UPS, and DHL.

• Warranty period: 365 days
• Delivery time: 1 week for in‑stock; no more than one month at the latest
• Payment terms: 50% advance payment; full payment for delivery

Key Features

• Drop‑in compatibility: Designed for GE Speedtronic MK I/II racks (commonly used in legacy gas turbine control cabinets), keeping wiring and logic unchanged.
• Backplane-powered: No external power supply; board is energized through the Speedtronic backplane, simplifying installation.
• Stable signal processing: Typically used for conditioning and routing analog/discrete signals so the turbine controller reads clean, stable values.
• Service-friendly design: Edge-connector interface and single-slot form factor make swap-outs fast during outages.
• Reliable in harsh cabinets: When installed in a ventilated control panel, it appears to handle typical 0–60°C ambient conditions well.
• Proven in the field: Many plants keep a spare STKJ1C on the shelf to minimize turbine downtime during troubleshooting.

Technical Specifications

Related or Supporting Products

• IC3600STKJ1A / IC3600STKJ1B: Earlier/lateral revisions commonly seen in older panels; J1C typically improves stability or component substitutions.
• IC3600SRTD1: RTD interface card used for temperature sensing; often paired in the same cabinet but not a direct substitute.
• IC3600LRRA1: Logic/relay interface style card; complements signal‑conditioning boards in the same MK I/II system.
• DS3800‑series (MK IV): Later-generation boards for MK IV. Not interchangeable but sometimes referenced when planning phased upgrades.

A maintenance lead from a combined‑cycle site told us the STKJ1C “brought a noisy pickup channel back into spec after cleaning the slot and reseating—no other changes needed.” That seems to be typical for well-kept MK II panels.

Installation & Maintenance

• Cabinet environment: Use in a clean, ventilated control cabinet. Keep ambient 0–60°C and humidity non‑condensing.
• ESD handling: Wear a grounded wrist strap. Avoid touching component leads; handle by board edges.
• Wiring: No field wiring to the board face; all connections route through the Speedtronic edge connector and backplane.
• Seating & guides: Inspect the slot guides and backplane connector; insert evenly and secure to prevent vibration‑related intermittency.
• Commissioning: Verify with panel prints; perform basic loop/functional tests. If the board has trim potentiometers, follow site calibration notes.
• Routine care: Annually, power down and clean dust from card surfaces with dry air; check edge contacts; re‑seat if required.

Quality & Certifications

• OEM GE legacy hardware; functional testing prior to shipment
• Typical panel‑level compliance: UL/CE when installed in compliant enclosures (legacy boards may not carry on‑board CE marks)
• RoHS: Legacy exemption is common for original‑era components
• Warranty: 365 days