Parameter
| Main Parameters | Value/Description |
|---|---|
| Product Model | 900G01-0001 |
| Manufacturer | Honeywell |
| Product Category | Digital Contact Input Module |
| Input Channels | 16 single-ended |
| Input Type | Dry contact / contact closure |
| Sensing Voltage | 15 VDC (self-powered from backplane) |
| Response Time | 4 ms OFF→ON; 6 ms ON→OFF |
| Isolation | Galvanic isolation (field to logic) |
| Mounting | HC900 I/O rack |
| Dimensions (H×W×D) | 137 × 35.6 × 151.7 mm |
| Weight | 0.354 kg |
| Operating Temperature | 0°C to 60°C |
Technical Principles and Innovative Values
- Self-Powered Input Loops: The module provides 15 VDC internally to sense external dry contact closures, eliminating the need for separate loop power wiring at every field device and reducing installation complexity.
- Galvanic Isolation: A robust isolation barrier separates the field wiring from the sensitive HC900 backplane electronics, protecting the controller from voltage spikes, ground loops, and electrical noise.
- Integrated Noise Filtering: Hardware debounce and filtering circuitry suppress false triggers caused by mechanical contact bounce and EMI from nearby high-voltage equipment, delivering clean logic signals.
- High-Density Hot-Swap Design: Sixteen channels fit in a slim 35.6 mm-wide slot and support live replacement, enabling maintenance without powering down the entire rack.
Application Cases and Industry Value
Pharmaceutical Batch ProcessingA pharma facility integrated the 900G01-0001 to monitor reactor vessel limit switches and pushbuttons. The module’s hardware debounce eliminated false triggers caused by contact bounce, ensuring accurate valve position feedback and uninterrupted batch sequences.Water & Wastewater TreatmentIn a distributed SCADA network, the module monitors pump status and tank level switches. Its hot-swap capability allows maintenance personnel to replace a faulty card without powering down the treatment train, keeping critical pumping operations online.
Related Product Combination Solutions
- 900G02-0001 Digital Output Module: Pairs with the 900G01-0001 to drive relays and solenoids from the same HC900 rack.
- 900A01-0001 Analog Input Module: Expands the system to acquire continuous process variables alongside discrete contacts.
- 900B01-0001 Analog Output Module: Complements the digital input by providing analog control signals for actuators.
- HC900 Controller: The central processor that the 900G01-0001 plugs into to execute control logic.
- 900TEK Terminal Block: Required 20-position Euro-style terminal block for wiring field contacts to the module.
