DS200KLDCF1AAB GE | New Surplus Stock

Description

Product Introduction

The solvent mixing area needed small keypads on 10 drives. Zone 2 hazardous area (flammable vapors present occasionally). The full-size Ex ia keypad (3,200) was too expensive and too large. The plant installed DS200KLDCF1AAB boards. Compact. Zone 2 Ex ib certified. 1,200 each. The mixers have local control. The budget survived. The safety auditor approved.

The DS200KLDCF1AAB is the compact intrinsically safe operator interface for Zone 2 hazardous areas. Same 64×32 graphic LCD and 12-key keypad as the standard F1A, but with intrinsic safety barriers (Ex ib, not Ex ia). The AAB board limits current to <50 mA and voltage to <15 V. It is certified for Zone 2 (gas) and Zone 22 (dust) — not Zone 1. The board is smaller and less expensive than the full Zone 1 keypad (KLDBG1AAA).

What makes the AAB different from the AAA (Zone 1)? Ex ib (Zone 2) vs Ex ia (Zone 1). Ex ib allows higher energy levels (still safe for occasional hazardous atmospheres). The AAB board is less expensive (1/3 the price). It also has lower power consumption (150 mA vs 600 mA). For Zone 2 applications (paint booths with ventilation, chemical mixing areas), the AAB is the cost-effective choice.

Key Technical Specifications

Quality Inspection Process (SOP Transparency)

Zone 2 IS testing requires fault simulation (single fault, not redundant).

Incoming Verification: OEM packing slip and ATEX certificate (Zone 2, Ex ib). Visual inspection: the board has IS barriers (resistors, zeners) — fewer than Zone 1 version. The LCD has encapsulation (clear epoxy). The keypad membrane is anti-static.

Fault Condition Test (Single Fault): Short RS-485 terminals. Measure current — must be <50 mA. Short power input — current <150 mA (limited by external barrier). Single fault only (Ex ib). No redundant components required.

Temperature Test (50 °C Ambient): Run board for 4 hours. Measure surface temperature (LCD, keypad) — must be <80 °C (T4 limit). At 50 °C, surface temp 68 °C.

Communication Test (With IS Isolator): Connect IS isolator (Pepperl+Fuchs KFD0-CS-EX1.53). Must communicate at 19.2 kbps. No errors.

Keypad Test (Anti-Static): ESD gun (10 kV air discharge). No spark, no damage.

Encapsulation Test: Inspect epoxy coating on LCD — no cracks.

Field reliability note (from our RMAd board tracking): We sold 12 units of DS200KLDCF1AAB over 18 months. Zero field failures. 0% failure rate.

Field Replacement Pitfalls

Get these five right and you’ll cut rework time by 90%. Zone 2 has relaxed rules, but still strict.

External IS Isolator Required — For RS-485
The AAB board has IS barriers, but RS-485 still needs an external isolator for Zone 2. One site connected directly to the controller (no isolator). The RS-485 circuit was not intrinsically safe (spark risk). Use Pepperl+Fuchs KFD0-CS-EX1.53 (or equivalent). The isolator costs $300. Required.

Power Supply — 5 V IS Barrier (Not Backplane)
The AAB board requires an external 5 V IS barrier (Pepperl+Fuchs KFD0-EB2-5V). One site powered the board from the backplane (5 V). The backplane is not intrinsically safe. Use the IS barrier. The barrier limits current to 150 mA (safe for Zone 2).

Enclosure — IP54 Minimum (Not Ex Enclosure)
Zone 2 allows standard IP54 enclosures (does not require Ex d). One site mounted the AAB board in an open panel (no enclosure). Dust could enter. The keypad is IP54 (front only). The back is exposed. Use an IP54 minimum enclosure (steel or polycarbonate).

Keypad Membrane — Do Not Puncture (Anti-Static Layer)
Same as AAA board — the anti-static layer prevents sparks from static discharge. Puncturing it with a stylus or screwdriver destroys the protection. One technician used a pen tip. Membrane punctured. Replace the board. Use your finger.

Ambient Temperature — 50 °C Max (T4 Limit)
The AAB board is T4 rated (135 °C surface temperature) but ambient limited to 50 °C. One site had 55 °C cabinet. Surface temperature 78 °C (still below 135 °C). The certificate requires 50 °C max ambient. The auditor noted a violation. Add cooling.

New Original vs. Refurbished: Why It Matters

Zone 2 IS boards are less expensive but still cannot be refurbished (barriers are one-time).

What “New Original (New Surplus)” means on this model:
GE manufactured the KLDCF1AAB in small quantities. Our stock comes from a chemical plant’s overstock — original GE cartons, ATEX certificate included. The IS barriers are factory-tested. The encapsulation is intact.

Refurbished risk in plain terms:
One refurbished AAB board we tested had a replaced zener diode (wrong voltage, 18 V vs 15 V). The fault voltage was 18 V (exceeds 15 V limit). The board was not safe for Zone 2. Another refurbished board had missing encapsulation (LCD exposed).

Real cost of a refurbished failure:
A non-intrinsically safe keypad in a Zone 2 area could ignite the atmosphere (if flammable vapors present during a fault). Fine: 50,000-100,000 from OSHA. A refurbished AAB board sells for 500-800 online. Our new surplus price is 1,200. The difference is 400-700. One OSHA fine pays for the delta 100 times over.

What we provide as proof:

• Original GE carton with ATEX seal
• ATEX certificate (Zone 2, Ex ib IIC T4)
• Fault test report (single fault, <50 mA)
• Temperature test (surface <80 °C)
• Encapsulation inspection
• 12-month warranty

Our price sits roughly 30% below GE’s last list price ($1,800) and about 70% above typical refurbished listings. The delta pays for ATEX traceability, fault testing, and certification.

Performance Benchmarks & Test Results

Test environment: Zone 2 test lab, 50 °C ambient, external IS isolator.

Fault current (short circuit, RS-485): 48 mA (spec: <50 mA). Pass.

Fault voltage (open circuit, RS-485): 14.5 V (spec: <15 V). Pass.

Surface temperature (50 °C ambient): 68 °C (spec: <80 °C for T4). Pass.

Backlight brightness: 300 nits (derated from standard F1A’s 400 nits for IS). Readable.

Communication (RS-485 with IS isolator): 19.2 kbps, no errors.

Keypad ESD test (10 kV): No spark, no damage.

Power consumption (5 V): 145 mA (spec: <150 mA). Pass.

Field reliability note (from our RMAd board tracking): 12 units sold, 0 failures. Refurbished boards: tested 4 units, 2 had wrong zener diodes, 1 had missing encapsulation, 1 passed (but no ATEX certificate). 25% passed? With certificate? 0% with valid certification. Buy new surplus.

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