Honeywell 900B01-0101 Analog Output Module

The Honeywell 900B01-0101 Analog Output module offers 4 isolated outputs, each with a selectable range from 0 to 21.8 mA. Users have the flexibility to scale each output to any span within this range, providing customization for specific needs. When the module is scanned, a green blinking status LED lights up, while a red status LED indicates the presence of diagnostics.

To ensure predictable operation, the module supports a user-specified failsafe value, which activates in case of communication interruption between the module and controller. Moreover, the module updates outputs synchronously with control execution, ensuring real-time performance. If necessary, users can set a rate of change limit on each output, offering additional control over output behavior.

Key Features:

Outputs per module: 4 (isolated)
Current range: 0 to 21.8 mA, selectable
Maximum load resistance: 750 ohms
Galvanic Isolation: 500 VDC (Channel to Channel), 600 VDC (from logic)
Accuracy: 0.1% full scale under reference conditions
Modules per rack: Up to 10, or 12 with ambient temperature de-rating (see figure below)
Minimum current sensing: > 3.5 mA per output
Calibration Data: Stored in non-volatile memory. The module offers redundant factory calibration with automatic rejection of bad versions. Additionally, users can perform individual channel field calibration.
Diagnostics: The module continuously monitors factory calibration, field calibration, configuration, and the +24 VDC power supply.
Output Verification: Feedback to the controller confirms the output current is flowing.
D/A Resolution: 12 bits
Power Supply Loading: 5V (40mA max), 24V (200mA max)