Description
Product Introduction
The GE IS215AEPCH1CA is a VMEbus auxiliary power supply module from the Mark VIe Speedtronic series, purpose-built to provide regulated DC power to specific sections of the Mark VIe control system backplanes and field devices. This board converts the plant’s nominal 125 VDC bus into clean, regulated voltages for auxiliary circuits, analog I/O, and field loops. The “CA” suffix indicates a conformal coated board with enhanced moisture and contaminant resistance for harsh environments, combined with the H1C revision features.
What sets the AEPCH1CA revision apart is its robust input filtering, wide input voltage tolerance (100–150 VDC), multiple regulated output rails including ±15 V for analog circuits, comprehensive diagnostics, and the acrylic conformal coating that protects power electronics from humidity, salt spray, and airborne particulates. The board delivers 5 VDC at 15 A for auxiliary logic, ±15 VDC at 2 A for analog circuits, and 24 VDC at 3 A for field loops—all with low ripple for stable operation. For system integrators requiring auxiliary power for analog and auxiliary circuits with environmental protection in demanding installations, this board is the direct OEM solution.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Input Voltage | 125 VDC nominal (range: 100–150 VDC) |
| Input Current | 2.5 A typical at full load |
| Output 1 (Logic) | 5 VDC @ 15 A continuous, 18 A peak |
| Output 2 (Analog) | +15 VDC @ 2 A continuous |
| Output 3 (Analog) | −15 VDC @ 2 A continuous |
| Output 4 (Field) | 24 VDC @ 3 A continuous, 4 A peak |
| Output Ripple | <50 mV peak-to-peak at full load (all outputs) |
| Efficiency | 89% typical at 125 VDC input, full load |
| Isolation | 2,500 VDC input-to-output |
| Overvoltage Protection | 5.5 V clamp (5 V), 16 V clamp (±15 V), 28 V clamp (24 V) |
| Overcurrent Protection | Foldback current limiting, auto-recovery |
| Input Transient Protection | 1,500 V surge withstand, 100 µs |
| Status Monitoring | Output voltage, current, temperature, health |
| Conformal Coating | Acrylic, MIL-I-46058C compliant, thickness 0.02–0.05 mm |
| Operating Temperature | 0 to +55°C (ambient), derated above 50°C |
| Storage Temperature | −40 to +85°C |
| Humidity Resistance | 95% RH non-condensing, continuous |
| Form Factor | 6U VME, single slot |
| Connectors | P1/P2 VME backplane, front panel terminal block |
| Power Draw | 125 VDC @ 2.5 A typical (312 W input) |
| Firmware | Requires Mark VIe Toolkit v6.0 or higher |
Key Selling Points & Differentiators
- Conformal Coated for Harsh Environments: The “CA” suffix provides acrylic coating that protects power electronics against humidity, salt spray, and airborne contaminants—ideal for offshore platforms, coastal plants, and high-humidity installations.
- Multiple Output Rails: 5 V, ±15 V, and 24 V outputs—supplies auxiliary, analog, and field power from a single module.
- ±15 V for Analog Circuits: Dedicated rails for precision analog I/O—ensures stable, low-noise operation.
- Wide Input Range: Accepts 100–150 VDC, covering typical plant battery voltages and fluctuations.
- Comprehensive Diagnostics: Voltage, current, temperature, and health monitoring for proactive maintenance.
- Comprehensive Protection: Foldback current limiting, overvoltage clamping, and thermal shutdown.
- Live Test Verified: Every board undergoes a 48-hour burn-in at full rated load with cycling input voltage. We log output voltages, ripple, thermal performance, and diagnostic thresholds. Coated boards are visually inspected for complete coverage and absence of bubbles.
- 90-Day Warranty: Covers functional defects. If it fails under normal operating conditions, we replace it. No restocking fee for verified returns.
- OEM Traceability: All units come from audited surplus channels with original GE anti-static bags and serialized labels.
- Pre-Shipment Capacitor Reform: For units stored more than 12 months, we perform controlled capacitor reforming to prevent inrush failures.
Frequently Asked Questions (FAQ)
Q: What does the “CA” suffix mean on IS215AEPCH1CA?
A: The “CA” indicates conformal coating combined with the H1C revision. Specifically, it means the board has an acrylic conformal coating (0.02–0.05 mm) applied to the entire PCB assembly for moisture and contaminant protection, along with all H1C features (15 A 5 V rail, ±15 V outputs, 89% efficiency). The coating adds protection; the H1C features provide auxiliary power capability.
Q: What is the difference between IS215AEPCH1C and IS215AEPCH1CA?
A: The H1C is non-coated; the H1CA has conformal coating. The coating protects against humidity, salt fog, and chemical vapors. If your cabinet is in a coastal area, offshore platform, or high-humidity environment, the CA variant is strongly recommended. In a clean environment, the H1C is sufficient and costs less. If your existing board is coated, you must replace it with a coated board (CA) because the uncoated version will fail faster in that environment.
Q: What is the ±15 V output used for?
A: The ±15 V output is specifically for powering precision analog circuits such as analog input boards (e.g., ACL, ACLE, ACLI) and analog output boards. These rails provide clean, regulated power for high-accuracy analog measurement and control. If your system includes these analog boards, you need ±15 V power.
Q: Can I use this board with both Mark VIe and Mark VIeS (SIL-rated) cabinets?
A: Yes—with a caveat. SIL systems typically require redundant power supplies. The AEPCH1CA can be used in those configurations, but ensure your backplane supports OR-ing diodes. We can help verify compatibility.
Q: Is this board hot-swappable?
A: No. The Mark VIe backplane does not support live insertion. You must de-energize the rack, wait for LEDs to extinguish, and discharge capacitors. We’ve seen technicians try to pull an AEPC with the rack still powered—it arced and damaged neighboring boards.
Q: What is the typical lead time for this part?
A: We stock these on the shelf—usually ship within 24 hours. For international orders, add 3–5 days for customs. If you need expedited (overnight air), coordinate with our logistics team.
Q: Does the conformal coating affect power delivery, efficiency, or protection?
A: No. The coating is applied after functional testing, so it does not affect the electrical characteristics. Power delivery, efficiency, ripple, and protection thresholds are identical to the non-coated H1C. The coating only provides environmental protection.
Q: Does this board work with the newer Mark VIeS (SIL-rated) cabinets?
A: To be direct: no. The IS215AEPCH1CA is not SIL-certified. It’s meant for standard Mark VIe industrial control. The SIL-rated systems use the IS220AEPC (with additional redundancy, diagnostic coverage, and separate safety shutdown path). Mixing them violates your site’s safety integrity level.
Q: What’s your return policy if this doesn’t fix my power-related fault?
A: If the board passes our QC test but doesn’t clear your fault, accept a return within 30 days provided no physical damage or overvoltage stress. We charge a 15% restocking fee if the fault was due to downstream short circuits or incorrect input voltage. We’ll diagnose with you before shipping.

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