Honeywell 900A16-0301 Analog Input Module

Honeywell 900A16-0301 High-Level Analog Input Module

The 900A16-0301 is a 16-channel high-level analog input (HLAI) module developed by Honeywell for the ControlEdge HC900 modular controller family. Designed for high-density analog data acquisition, it connects field transmitters—such as flowmeters, pressure sensors, and temperature transmitters—directly to the controller backplane for process monitoring and closed-loop control.

Signal Processing and Switch-Selectable Shunts

The module processes voltage input ranges including 0 to 1 VDC, 0 to 2 VDC, 0 to 5 VDC, 1 to 5 VDC, 0 to 10 VDC, and bipolar ranges up to ±10 VDC. For 0 to 20 mA and 4 to 20 mA current loops, integrated 250 Ω shunt resistors can be engaged via DIP switches, eliminating the need for external precision resistors. An onboard 15-bit A/D converter delivers ±0.1% full-scale accuracy with a module update rate of 100 ms across all 16 channels.

System Isolation and Installation Requirements

To safeguard system logic against severe electrical noise and common-mode transients, the module features galvanic isolation rated at 400 VDC channel-to-channel and 1000 VDC channel-to-logic. The module plugs directly into any standard HC900 I/O rack slot and connects to field wiring using a 36-terminal Euro-style terminal block (Model 900TEK-0301 or equivalent). It operates from an internal 5 VDC bus drawing up to 250 mA, with safety certifications for CE, UL/cUL, FM Class I Div 2, and ATEX Zone 2 environments.

Frequently Asked Questions

Q: How are current signals configured on the Honeywell 900A16-0301 module? A: Current loops (0–20 mA or 4–20 mA) are selected via internal DIP switches that engage built-in 250 Ω shunt resistors on each channel.

Q: What terminal block model is required for field wiring? A: The module requires a 36-terminal Euro-style block, specifically Honeywell part number 900TEK-0301 or an equivalent compatible block.

Q: What isolation protection is provided between channels and controller logic? A: It provides 400 VDC channel-to-channel isolation and 1000 VDC galvanic isolation between the field channels and the internal logic backplane.