IS200STCIH2AED STCI GE 24-Input Module

Core Specifications: GE IS200STCIH2AED

• Brand & Model: General Electric IS200STCIH2AED — authentic Mark VI Speedtronic series board.
• Manufacturer: GE Industrial Systems (USA).
• Product Type: Simplex Contact Input Terminal Board. Functional acronym STCI.
• Series: Mark VI / Mark VIe / Mark VIeS. IS200 series tag indicates modular I/O assembly.
• PCB Protection: Full conformal coating. Group 2 Mark VIeS Series product grouping.
• Revision: A-rated sole revision. AED suffix denotes specific functional variant.
• Input Channels: 24 dry contact voltage input channels.
• Excitation Voltage: Nominal 24, 48, or 125 V DC from external source. Floating 24V DC range: 18.5 to 32V DC.
• Input Ranges: 16–32V DC, 32–64V DC, and 100–145V DC respectively.
• Threshold Voltage: 50% of excitation voltage.
• Current Draw: First 21 circuits draw 2.5 mA. Circuits 22–24 draw 10 mA.
• Input Filter: Hardware filter, 4 ms. Rejects high-frequency noise and surge.
• Availability: In stock. Ready to ship.

Functional Description & System Integration

• Simplex Operation: Supports only simplex systems. Not rated for TMR configurations.
• I/O Pack Compatibility: Accepts PAIC I/O Pack. Plugs into 37-pin D-type female connector.
• Communication: I/O pack communicates with controller via Ethernet. No direct backplane connection.
• Signal Conditioning: Onboard conditioning scaled for 24, 48, and 125V DC excitation. Identical function to TBCI boards.
• Fault Detection: Detects excitation voltage loss at contact input. Identifies non-responsive contacts during test mode.
• Compatible Boards: Functions with IS230SNCI and IS230STCI terminal boards. PDIA impacted I/O pack.

Input Protection & Noise Suppression

• Surge Protection: Integrated suppression at each signal entry point. Guards against voltage transients.
• High-Frequency Rejection: Hardware filters remove noise before signal processing.
• Current Limiting: Resettable polymer PTC fuses limit 24V DC supply to 0.5 A. Self-resetting after fault clears.
• No Fuse Replacement: PTC devices automatically recover. No maintenance required.
• Signal Path: Discrete voltage signals route to I/O processor. Processor converts to digital data. Sends to controller via Ethernet.

Mechanical Design & Mounting

• Mounting Options: DIN-rail mount with sheet metal carrier. Alternate panel mount with cabinet bolting.
• Insulation: Includes plastic insulator between board and carrier.
• Termination: Right-angle header accepts commercial pluggable terminal blocks. Total 52 terminals.
• Wiring Gauge: #18 AWG recommended for direct field wiring.
• Shielding: Terminate shields on separate bracket. Do not land on terminal block.
• Board Features: Two round apertures on short edges. E1 and E2 labels on terminal ring.
• Component Population: Over 80 resistors, capacitors, diodes. Single integrated circuit. Single 37-pin D-type female connector. One 3-position female plug opposite terminal strip.

Product Lineage & Revision Status

• Series Classification: IS200 series tag confirms Mark VIe/VIeS modular assembly.
• Functional Abbreviation: STCI denotes Simplex Contact Input terminal board.
• PCB Coating: Conformal coating explicitly coded in product number.
• Group Assignment: Group 2 Mark VIeS Series product grouping.
• Revision Status: Single A-rated revision. No functional revision variants.
• Documentation: Original GE manual materials limited online. Functional product number provides primary specification source.

Installation Procedure

• Carrier Assembly: Mount board on sheet metal carrier with plastic insulator.
• DIN Rail Mount: Clip carrier onto DIN rail. Secure with end brackets.
• Panel Mount: Bolt carrier assembly directly into cabinet interior.
• Terminal Block: Install commercial pluggable terminal block onto right-angle header.
• Field Wiring: Route #18 AWG wires to terminal positions. Follow excitation voltage rating.
• I/O Pack Installation: Insert PAIC I/O Pack into 37-pin D-type connector. Secure with locking screws.
• Shield Termination: Land all cable shields on dedicated bracket. Isolate from board ground.

Shipping & Availability

• Stock Status: In stock. Ships within 24 hours.
• Carriers: FedEx, UPS, DHL.
• Packaging: Anti-static ESD bag. Foam-lined industrial box.
• What You Receive: 1x GE IS200STCIH2AED Simplex Contact Input Terminal Board. Plastic insulator pre-assembled. No terminal blocks, I/O packs, or mounting hardware included.

Frequently Asked Questions (FAQ)

1. What is the difference between STCI and TBCI terminal boards?

Both boards share identical signal conditioning and contact sensing circuits. The STCI board is scaled specifically for 24, 48, and 125V DC excitation. TBCI typically supports different voltage families. STCI also uses a right-angle header for pluggable terminals rather than fixed terminal strips.

2. Can I use this board in a Triple Modular Redundant (TMR) system?

No. GE explicitly rates this board for simplex systems only. The IS200STCIH2AED lacks the redundant I/O pack interfaces required for TMR operation. Use TBCI or TBTB boards for TMR applications.

3. How do the resettable PTC fuses work?

These are polymer positive temperature coefficient devices. When current exceeds 0.5A, the polymer heats and increases resistance. This limits current. After removing the fault, the polymer cools and returns to low resistance. You never replace these fuses.

4. What excitation voltage should I select for 24V DC operation?

Apply 18.5 to 32V DC to the pluggable terminal block. The board accepts this full range. Threshold triggers at 50% of your applied voltage. For nominal 24V DC, expect threshold at 12V DC.

5. Why are currents different on circuits 22 through 24?

GE designed the first 21 circuits for standard dry contact sensing at 2.5 mA. Circuits 22–24 allow 10 mA for specialized applications requiring higher wetting current. This accommodates contact oxidation penetration or longer cable runs.

6. Does the board include the PAIC I/O Pack?

No. The IS200STCIH2AED ships as the terminal board only. You must order the PAIC I/O Pack separately. The board accepts the pack via its D-type connector but does not include it.

7. How do I verify conformal coating integrity?

Inspect under bright white light. The coating appears as a transparent glossy layer. It covers all components and traces uniformly. No bare fiberglass should remain. The coating protects against condensation and conductive debris.

8. Buying advice: Is the H2AED revision preferred over older STCI variants?

Yes. The IS200STCIH2AED carries the A-rated sole revision with conformal coating. This is the most current STCI variant for Mark VIe systems. It resolves component obsolescence issues found in earlier STCI production runs. Always select AED suffix for new installations.