Product Details
The Honeywell S7800A1001, also cataloged as the S7800A Keyboard Display Module, operates as a dedicated hardware component for diagnostic data readout and parameter configuration within Honeywell 7800 Series burner control platforms. Powered by a 13 VDC peak full-wave rectified supply from the burner control module, the unit receives dynamic status messages and fault history logs via local serial transmission. It translates internal control state registers into a 40-character English language display, providing real-time optical feedback on sequence timing, flame signal voltage, and system hold conditions.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | S7800A1001 |
| Brand | Honeywell |
| Origin | USA |
| Weight | 0.14 kg (0.30 lbs) |
| Dimensions | Standard 7800 Series flush-mount housing |
| Operating Temp | -40 to +60 deg C |
| Power Consumption | 7 W / 2 VA (13 VDC peak full-wave rectified) |
| Display Capacity | 40 characters (2 lines x 20 characters) |
| Display Language | English |
| Replacement Model | S7800A2142 |
4-20 mA HART Loop Protocol Coexistence & Cold Junction Compensation
The S7800A1001 incorporates high-density CMOS logic circuits and optically isolated communication lines designed to operate in severe electrical noise environments. When deployed alongside process instrumentation utilizing 4-20 mA HART loop protocol signaling or cold junction compensation (CJC) thermocouple circuits, internal high-frequency filtering prevents display flicker and data corruption caused by adjacent electromagnetic fields. The display circuitry maintains steady-state current draw across the 13 VDC supply rail, shielding internal microprocessors from voltage transients generated by main burner ignition transformers.
Frequently Asked Questions
Q: Can the S7800A1001 be hot-plugged directly into an energized 7800 Series relay module?
A: Yes, the module supports direct hot-plug insertion into the front card edge socket of an energized 7800 Series control module, as power and serial communication lines are current-limited at the main board connection interface.
Q: What power source drives the 40-character LCD backlight and logic processor?
A: The module derives its power directly from the host 7800 Series relay module via a 13 VDC peak full-wave rectified power bus, requiring no external secondary power supply connections.
Field Installation Guidelines
- Align the rear card edge plug of the module with the front receiving jack of the 7800 Series relay module or remote mounting bracket.
- Press the assembly straight into the socket until the side retaining clips snap securely into place to establish ground continuity.
- For remote cabinet door mounting, ensure the interconnecting ribbon cable is routed away from high-voltage ignition wiring and motor starters.
- Verify that the ambient operating temperature surrounding the display panel does not exceed +60 deg C to preserve LCD liquid crystal contrast response.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
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