Honeywell Digital Input 24 VDC (900G32-0301)
Product Introduction
The Honeywell 900G32-0301 provides 32 DC digital inputs arranged in two groups of 16 channels. Each group includes a pair of screw terminals for the common connection. When DC power applies between the common terminal and any input, that input turns ON. A green LED per channel shows the ON state. Furthermore, controller logic can invert any input state when necessary. A green blinking LED indicates normal scanning, while a red LED signals diagnostics.
Technical Specifications
This high-density DC input module delivers reliable performance. Its key specifications are listed below.
Inputs per module: 32 (sinking type)
Input voltage range: 10 VDC to 32 VDC
Peak voltage: 32 VDC
Galvanic isolation: 2 groups of 16 inputs (30 VDC max.)
ON voltage level: 9.5 VDC minimum
OFF voltage level: 3.5 VDC maximum
Input impedance: 6.9 K ohms nominal
Input current: 1.7 mA at 12 VDC / 3.5 mA at 24 VDC nominal
Minimum ON current: 1.0 mA
Maximum OFF current: 0.7 mA
OFF to ON response time: 5 ms maximum
ON to OFF response time: 5 ms maximum
Operating temperature: -40 to 70°C
Storage temperature: -40 to 85°C
The Honeywell 900G32-0301 uses a Euro style 36-terminal block. Response times exclude controller scan time and backplane transmission time.
Frequently Asked Questions (FAQ)
1. Can I use this module with 5 VDC signals?
No. The Honeywell 900G32-0301 requires a minimum ON voltage of 9.5 VDC. For 5 VDC signals, please select a different input module.
2. What does “sinking input” mean for this module?
Sinking means the input provides a current path to common. DC power applies between the common terminal and the input terminal. The input turns ON when current flows into it from the field device.
3. How fast can the module detect fast pulses?
The OFF-to-ON and ON-to-OFF response times are both 5 ms maximum. However, this excludes controller scan time and backplane transmission. For faster detection, add your controller’s scan time to the total delay.
4. Can I mix 12 VDC and 24 VDC inputs on the same module?
Yes. The Honeywell 900G32-0301 accepts any DC voltage from 10 VDC to 32 VDC per channel. Both groups share the same voltage range. Always stay above 9.5 VDC for reliable ON detection.
5. Is the module suitable for outdoor or cold storage applications?
Yes. It operates from -40°C to 70°C and stores from -40°C to 85°C. This extended temperature range makes it ideal for harsh environments like cold storage or unheated shelters.
