Honeywell 621-9940C Serial I/O Module Board
Downtime is expensive. The 621-9940C serial i/o module board pays for itself the first time you need it. Type: Serial I/O Module | Supported Protocols: RS-232, RS-485 | Mounting Slot: Slot N (full-size rack) or Slot H (half rack). Factory-new, bench-tested, 12-month replacement warranty.
Technical Specifications
| 621-9940C | is a high-performance Serial I/O Module (SIOM) designed for seamless integration with Honeywell’s TPS and PlantScape distributed control systems. It enables reliable serial communication between controllers and field devices in industrial automation environments. |
|---|---|
| Model | 621-9940C |
| Type | Serial I/O Module |
| Supported Protocols | RS-232, RS-485 |
| Mounting Slot | Slot N (full-size rack) or Slot H (half rack) |
| Module Density Options | 0, 8, 16, or 32 points per slot |
| Terminating Resistors | Required for each serial channel; two for last SIOM in multidrop setups |
| DIP Switches | Four 8-position banks + one 4-position bank for address, fault response, and mode settings |
| Dimensions | 264 × 32 × 127 mm |
| Weight | 0.61 kg |
| Origin | USA |
| Condition | New or surplus stock |
| Warranty | 12 months |
| Multi-Protocol Support | Compatible with RS-232 and RS-485 for flexible field device integration |
| Hot-Swappable | Enables replacement without system shutdown, minimizing downtime |
| Real-Time Data Transfer | Ensures fast and reliable communication for process control |
| Point-to-Point and Multidrop | Configurable for various network topologies |
| LED Diagnostics | Provides immediate feedback for fault detection and troubleshooting |
| Compact Design | Optimized for Honeywell I/O racks, conserving panel space |
| Industrial Durability | Engineered for harsh environments with high reliability |
| System Compatibility | Fully integrates with Honeywell TPS and PlantScape platforms |
| Manufacturer | Honeywell |
| Model / SKU | 621-9940C |
✓ Ships within 24 hours | ✓ 12-Month Warranty | ✓ Worldwide Delivery
Detailed Product Information
Function & Specs
Handles is a high-performance Serial I/O Module (SIOM) designed for seamless integration with Honeywell’s TPS and PlantScape distributed control systems. It enables reliable serial communication between controllers and field devices in industrial automation environments.. Honeywell proprietary design.
Specifications
| Parameter | Value |
|---|---|
| 621-9940C | is a high-performance Serial I/O Module (SIOM) designed for seamless integration with Honeywell’s TPS and PlantScape distributed control systems. It enables reliable serial communication between controllers and field devices in industrial automation environments. |
| Model | 621-9940C |
| Type | Serial I/O Module |
| Supported Protocols | RS-232, RS-485 |
| Mounting Slot | Slot N (full-size rack) or Slot H (half rack) |
| Module Density Options | 0, 8, 16, or 32 points per slot |
| Terminating Resistors | Required for each serial channel; two for last SIOM in multidrop setups |
| DIP Switches | Four 8-position banks + one 4-position bank for address, fault response, and mode settings |
Spare Economics
Module: thousands. Downtime in water treatment: $10K-$250K/day. One avoided outage = 10-100x ROI. Keep one cold spare.
Real Inventory
Physically in Shenzhen. Not virtual. 10,000+ modules. Ships today.
Where It Operates
Deployed in water treatment on Honeywell systems.
Examples
- Description The Honeywell 621-9940C is a high-performance Serial I/O Module (SIOM) designed for seamless integration with Honeywell’s TPS and PlantScape distributed control systems.
- It enables reliable serial communication between controllers and field devices in industrial automation environments.
- Specifications Model : 621-9940C Type : Serial I/O Module Supported Protocols : RS-232, RS-485 Mounting Slot : Slot N (full-size rack) or Slot H (half rack) Module Density Options : 0, 8, 16, or 32 points per slot Terminating Resistors : Required for each serial channel; two for last SIOM in multidrop setups DIP Switches : Four 8-position banks + one 4-position bank for address, fault response, and mode settings Dimensions : 264 × 32 × 127 mm Weight : 0.
No spare = one failure from downtime. Ships within 24 hours.
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