Product Overview
900G04-0101 is a Honeywell AC/DC Digital Input Module. It provides 16 individually isolated inputs that are powered externally. Two terminals serve each circuit. AC or DC power across the input terminals turns the input on.
Each channel has a green LED for ON state. A green blinking status LED shows module scanning. A red status LED indicates module diagnostics. Controller logic can invert the input state when needed. The module requires a Euro style 36-terminal terminal block.
Key Advantages
- Dual AC/DC input — one module covers 80–264 VAC and 80–125 VDC applications.
- Individually isolated inputs — input-to-input and input-to-chassis isolation up to 350 VAC.
- Wide voltage range — handles 120/240 VAC and 125 VDC field signals.
- Clear diagnostics — per-channel LED plus module status LEDs.
- Simple field wiring — two terminals per circuit, 36-terminal block.
Technical Specifications
| Brand | Honeywell |
| Model | 900G04-0101 |
| Series | Digital Input Module – AC/DC Type |
| Module Type | AC/DC Digital Input, externally powered |
| Inputs per module | 16 (AC), 16 (DC) |
| Input voltage range (AC) | 80 VAC to 264 VAC |
| Input voltage range (DC) | 80 VDC to 125 VDC |
| Peak voltage | 264 VAC / 150 VDC |
| AC frequency | 47 Hz to 63 Hz |
| Galvanic isolation | Input to input and input to chassis, 350 VAC max |
| On voltage level | 75 VAC / 75 VDC |
| Off voltage level | 20 VAC / 30 VDC |
| Input impedance | 48 k ohms nominal |
| Input current | 1 mA nom. @120 VAC 60 Hz; 2 mA nom. @240 VAC 50 Hz; 2 mA nom. @125 VDC |
| Minimum on current | 0.3 mA |
| Maximum off current | 0.2 mA |
| Off to on response time | 6 ms + 1.5 line cycles max (AC); 6 ms + 2 line cycles max (DC) |
| On to off response time | 6 ms + 2 line cycles max (AC and DC) |
| Operating temperature | 0 to 60 °C (typical industrial) |
| Storage temperature | -40 to 85 °C |
| Humidity | 5 to 95 % non-condensing |
| Noise immunity | Per-channel isolation supports industrial noise rejection |
| Terminal block | Euro style 36-terminal block required |
Installation Guide
- Mount the module in a compatible Honeywell controller rack.
- Fit the required Euro style 36-terminal terminal block.
- Connect AC or DC field power to each input pair.
- Keep AC and DC wiring separated where possible.
- Use proper wire sizing for 80–264 VAC and 80–125 VDC.
- Check green channel LEDs after power-up.
- Confirm green blinking status LED shows active scanning.
- If red status LED is on, review module diagnostics before operation.
Commissioning and Maintenance
- Verify field voltage stays within the AC or DC input range.
- Confirm ON voltage exceeds 75 VAC or 75 VDC.
- Confirm OFF voltage stays below 20 VAC or 30 VDC.
- Test each input with a known AC or DC source.
- Use controller logic to invert input state if needed.
- Inspect terminal block seating during routine checks.
- Replace module if red diagnostics LED stays on.
Compatibility Notes
- Designed for Honeywell 900G04 series backplanes.
- Requires a Euro style 36-terminal terminal block.
- Works with AC pilot devices and DC contact circuits.
- Isolation supports mixed input voltage arrangements.
- Contact Oiltech Controls for rack compatibility checks.
Diagnostic Capabilities
- Per-channel green LED — shows digital input ON state.
- Green blinking status LED — confirms module scanning.
- Red status LED — indicates module diagnostics exist.
- Controller logic can invert input state for flexible fault handling.
- Response times support short pulse detection.
Typical Applications
- 120/240 VAC pilot device monitoring.
- 125 VDC contact and relay status feedback.
- Pushbutton and selector switch input in industrial panels.
- Limit switch and position sensing on AC or DC circuits.
- Obsolete control system upgrades with mixed voltage inputs.
- Alarm and interlock status monitoring.
Why Buy From Oiltech Controls?
- 15+ years of industrial automation spare parts experience.
- Global shipment support via FedEx, UPS, and DHL.
- Tested industrial surplus and refurbished options available.
- 12-month warranty on qualifying products.
- Technical verification before shipment on every order.
- Support for obsolete control systems and hard-to-find modules.
Packing List and Warranty
- 1 × 900G04-0101 AC/DC Digital Input Module.
- Anti-static protective packaging.
- Documentation or label reference as available.
- 12-month warranty covers functional defects under normal use.
- Shipping via FedEx, UPS, or DHL — selected at order confirmation.
Certifications and Compliance
- Built for industrial automation environments.
- Galvanic isolation supports safe field-to-module separation.
- CE and RoHS compliance may apply by batch — confirm with Oiltech Controls.
- Contact us for specific certificate requests before purchase.
FAQ
Q: How many inputs does the 900G04-0101 have?
A: It has 16 individually isolated inputs.
Q: Does the module supply power to the field?
A: No. Inputs are powered externally.
Q: What AC voltage range does it accept?
A: 80 VAC to 264 VAC, 47 Hz to 63 Hz.
Q: What DC voltage range does it accept?
A: 80 VDC to 125 VDC, with 150 VDC peak.
Q: What is the isolation rating?
A: Input to input and input to chassis, 350 VAC max.
Q: What terminal block is required?
A: A Euro style 36-terminal terminal block.
Q: What do the LEDs mean?
A: Green per-channel LED = input ON. Green blinking status LED = module scanning. Red status LED = module diagnostics exist.
Q: What shipping methods do you use?
A: FedEx, UPS, and DHL.
Q: What is the warranty?
A: 12 months on qualifying products.
Contact Information
Inquiries: info@oiltechcontrols.com
Phone / WhatsApp: +86 158 8020 0923
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