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Honeywell 900A16-0301 High-Level Analog Input Module

The Honeywell 900A16-0301, also cataloged as the 900A16-0301 High-Level Analog Input Module, operates as a dedicated hardware component for analog signal acquisition within the Honeywell ControlEdge HC900 controller system. It receives voltage and current field signals through 16 isolated input channels and performs local analog-to-digital conversion for controller execution.

Hardware Specifications

Parameter	Specification
Model	900A16-0301
Brand	Honeywell
Origin	USA
Dimensions	111.1 mm x 94.0 mm x 66.0 mm
Operating Temp	0 deg C to 60 deg C
Power Consumption	+5 V rail: 75 mA max; +24 V rail: 50 mA max
Product Type	16-Point High-Level Analog Input Module
Product Family	Honeywell ControlEdge HC900
Input Channels	16 isolated analog input channels
Input Configuration	User-configurable voltage or current input per channel
Voltage Input Ranges	0 to 1 V, 0 to 2 V, 0 to 5 V, 0 to 10 V
Current Input Ranges	0 to 20 mA, 4 to 20 mA
Current Input Conversion	Integrated 250 ohm shunt resistor selectable by DIP switch
A/D Converter Resolution	15 bits
Update Rate	100 ms
Accuracy	+/-0.1% of reading typical
Channel Isolation	400 VDC point-to-point galvanic isolation
Logic and Chassis Isolation	1 kVDC
Terminal Interface	36-terminal removable Euro-style or barrier-style terminal block
Operating Humidity	10% to 90% RH non-condensing
Storage Temperature	-40 deg C to 70 deg C
Environmental Protection	G3 conformal coating standard except power supplies

Process Control Analog Signal Interface

The Honeywell 900A16-0301 supports direct connection of industrial analog transmitters and field instruments through configurable voltage and current inputs. Each channel operates with independent isolation to prevent signal interference between measurement points.

The module architecture uses local microcontroller processing to synchronize analog conversion with ControlEdge HC900 CPU execution. Therefore, the system reduces data transfer latency between the I/O module and controller processing cycle.

For current loop applications, the integrated 250 ohm shunt resistor converts 4-20 mA and 0-20 mA signals into voltage inputs for analog measurement. Additionally, the isolated channel design supports separated field wiring arrangements and reduces common signal coupling.

Frequently Asked Questions

Q: Does the Honeywell 900A16-0301 support 4-20 mA field transmitter signals?
A: Yes. The module supports 4-20 mA and 0-20 mA current inputs with selectable 250 ohm shunt resistors for current signal conversion.

Q: How does the module provide isolation between analog input channels?
A: The module provides 400 VDC galvanic isolation between individual input channels and 1 kVDC isolation between field circuits and logic/chassis circuits.

Q: Can the input range be configured independently for each channel?
A: Yes. Each input point can be configured separately for supported voltage or current measurement ranges according to the application requirements.

Field Installation Guidelines

• Install the 900A16-0301 module in the designated ControlEdge HC900 I/O rack slot according to the controller hardware configuration.
• Use the specified removable terminal block interface for field wiring connections.
• Separate analog signal cables from high-voltage power wiring and switching circuits to reduce electrical noise coupling.
• Connect cable shields according to plant grounding standards and avoid multiple-point shield grounding on sensitive analog loops.
• Verify channel configuration before connecting field transmitters, including voltage range, current range, and shunt resistor selection.
• Confirm field device polarity and signal reference connections before applying power to the module.
• Check controller diagnostics after installation to verify channel status and analog input scaling.

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