Product Details
The Honeywell 4DP7APXAD-911, also cataloged as the 4DP7APXAD-911 Analog-to-Digital Converter PIU, operates as a dedicated hardware component for real-time field signal conversion and digitized process variable transmission within Honeywell TDC 2000 distributed control systems.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 4DP7APXAD-911 (4DP7APXAD911) |
| Brand | Honeywell |
| Origin | USA |
| Weight | 500 g (1.54 lbs) |
| Dimensions | Standard TDC 2000 rack card footprint |
| Operating Temp | 0 to +60 deg C |
| Power Consumption | Backplane-supplied DC power |
| Module Type | Analog-to-Digital Converter PIU Circuit Board |
| Signal Input Type | Analog voltage or current (4-20 mA / 1-5 VDC) |
| Primary Function | Analog signal acquisition and ADC processing |
| Mounting Type | Panel or rack mount |
| System Compatibility | Honeywell TDC 2000 DCS |
4-20 mA HART Loop Protocol and Channel-to-Channel Isolation
The module incorporates robust channel-to-channel isolation networks designed to prevent field loop interference and ground potential differences from degrading signal resolution. Precision front-end analog-to-digital conversion circuitry conditions 4-20 mA current and voltage signals from temperature, pressure, and flow transmitters. The isolated conditioning stage decouples field sensor leads from backplane digital logic, suppressing common-mode electrical noise and preserving measurement accuracy across the TDC 2000 system bus.
Frequently Asked Questions
Q: What input signal ranges does the 4DP7APXAD-911 board accept from field transmitters?
A: The board accepts standard industrial analog voltage and current inputs, such as 4-20 mA current loops and 1-5 VDC signals, converting them into digital values for DCS processing.
Q: How is backplane power and electrical grounding established during module installation?
A: Operating power is drawn directly through the rack backplane bus edge connector, while card cage guide rails and mounting screws provide mechanical grounding.
Field Installation Guidelines
- Power down the designated TDC 2000 Process Interface Unit (PIU) rack cage slot before attempting module insertion.
- Align the board circuit edges with the upper and lower slot guides and push firmly until the backplane edge connector fully seats.
- Tighten front panel retaining screws to secure mechanical grounding and prevent connection degradation under ambient vibration.
- Verify that field wiring shield drain wires are terminated at a single common earth ground terminal to prevent ground loop noise on incoming analog signals.
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.
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