Product Details
Honeywell 07191/1/1 RS485 Communication Board
Configured for serial data transmission in Honeywell automation network architectures, the Honeywell 07191/1/1 (07191/1/1 RS485 Communication Board) provides direct physical/electrical execution. It handles differential voltage signalling, half-duplex bus communication, and noise rejection protocols required for point-to-point and multi-drop field device interfaces without relaying network transmission overhead to the host processor.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 07191/1/1 |
| Brand | Honeywell |
| Origin | USA |
| Operating Temp | 0 to +60 deg C |
| Power Consumption | Standard Backplane Bus Supply |
| Interface Type | RS485 Serial Protocol |
| Transmission Mode | Half-Duplex Differential Signalling |
Channel-to-Channel Isolation & Loop Stability
The Honeywell 07191/1/1 integrates channel-to-channel isolation topology to prevent ground loop currents from degrading RS485 differential signals across long cable runs. Integrated line filter network and channel-to-channel isolation circuits stabilize serial frames against electromagnetic interference present in heavy industrial environments. By decoupling local system ground from external field cabling, the board maintains signal integrity and protects internal logic components against high common-mode voltage transients.
Frequently Asked Questions
Q: What grounding practice is recommended for the RS485 signal cable shield connected to the board?
A: The cable shield must be grounded at a single point, typically at the main controller ground bus, to avoid ground loop current loops. The shield drain wire at the module connection must remain isolated from high-voltage conduit grounds.
Q: Can the 07191/1/1 board be inserted or removed while the host rack is powered?
A: Power off the subsystem rack before inserting or removing the 07191/1/1 board unless the underlying Honeywell enclosure backplane explicitly supports hot-swap procedures for communication interface cards.
Field Installation Guidelines
- Power down the rack chassis and verify zero potential across the backplane power terminals before inserting the board.
- Align the printed circuit board edges with the card guides of the assigned enclosure slot and push firmly until the backplane connector seats completely.
- Tighten all front panel retaining screws to secure mechanical grounding and prevent vibration-induced disconnects.
- Route twisted-pair RS485 field wiring away from high-voltage AC lines, motor leads, and variable frequency drive output cables.
- Install 120 ohm bus termination resistors across the differential signal lines at the two physical ends of the RS485 network segment.
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
Comprehensive Guide to Noise Types in Industrial Automation and Electronics
Mitigating Emergency Stop Spurious Trips in Industrial Control Systems
Emergency stop (E-Stop) pushbuttons serve as vital safety devices in factory automation and process control plants. Functional safety standards mandate normally-closed (NC) contact blocks to ensure fail-safe operation during wiring breaks or power outages. However, mechanical degradation over time can trigger unexpected spurious trips, halting production lines without an actual emergency. Understanding the underlying causes of mechanical contact failure allows automation engineers to implement robust, fault-tolerant safety circuits.
Redundant Automation Systems: Maximizing Uptime in Critical Control Applications
Industrial automation relies on continuous operational stability to prevent catastrophic downtime and financial loss. While standard dictionary definitions treat redundancy as superfluous, industrial engineers consider redundant control architectures indispensable for high-availability systems. Implementing backup hardware ensures seamless takeover during primary equipment failures, protecting critical infrastructure across manufacturing and process industries.