900B08-0202 Honeywell Analog Output 8 Channel

Overview

The Analog Output Module provides eight 0 to 21.0 mA outputs that can be scaled by the user to any span within this range on a per-output basis. Outputs are isolated in groups of 4, with no isolation between outputs within a group. All points are isolated from the controller logic. A green blinking status LED on the module indicates when the module is being scanned, while a red status LED lights up when module or channel diagnostics exist. The module supports a user-specified failsafe value to ensure predictable operation if communication with the controller is interrupted. Outputs are updated synchronously with control execution, and a user-specified rate of change limit may be applied to each output via the slew rate function block. The module requires a Euro-style 36-terminal terminal block.

Key Features

• Outputs per Module: 8, isolated in 2 groups of 4 outputs (1-4, 5-8)
• Current Range: 0 to 21.0 mA, user-selectable span
• Load Resistance: 750 ohms max
• Galvanic Isolation: 500VDC group to group (Groups 1-4, 5-8), 500VDC from logic
• Accuracy: 0.1% full scale at reference conditions
• Modules per Rack: 5 max when powered from internal 24V backplane power; 10 max when powered from external 24V backplane power
• Minimum Current Sensing: > 0.5 mA per output
• Calibration Data: Stored in non-volatile memory, redundant factory calibration with automatic rejection of bad versions
• Diagnostics: Monitoring of factory calibration, configuration, and +24 VDC power supply
• Output Verification: Feedback to controller indicating output current flow
• D/A Resolution: 13+ bits (1 part in 13332)
• Fail Safe State Configuration: Options for holding last value or setting a failsafe value
• User-Specified Scan Rate: Supported by the slew rate function block, converting maximum rate of change to milliamp output per execution cycle

Specifications Table