Honeywell Digital Output 24 VDC Module for Industrial Control

Overview of the Honeywell 900H32-0302 Output Module

The Honeywell Digital Output 24 VDC (900H32-0302) provides 32 digital outputs for industrial control systems.
This module separates these 32 outputs into 2 groups of 16 channels each.
Each group requires external power through a pair of screw terminals for +V and COM connections.
The 900H32-0302 uses high side switching (current sourcing) output type for compatibility with many field devices.
For protection, the module provides over current protection in 4 groups of 8 channels each.
If any output channel experiences a short circuit, that whole group of 8 channels switches off.
Notably, power cycling is not required to reset the module after a fault condition.

Technical Specifications of the 900H32-0302 Module

Below are the complete technical parameters for this digital output module.

Output Configuration and Channel Grouping

The Honeywell 900H32-0302 organizes its 32 outputs into a logical grouping structure.
Two galvanically isolated groups contain 16 channels each for flexible wiring.
Each group has its own +V and COM screw terminals for external power connection.
Consequently, you can power each output group from different power supplies if needed.
The module uses high side switching, meaning the output switches the positive supply.
This current sourcing configuration suits most industrial PLC and DCS applications.
For the ON voltage drop, the 900H32-0302 measures only 0.15 VDC at 0.5 A load.
Thus, the module delivers nearly full supply voltage to your field devices.

Over Current Protection and Fault Handling

For protection, the 900H32-0302 divides its 32 outputs into 4 groups of 8 channels each.
Each group of 8 channels has active current limiting integrated into the output driver.
When a short circuit occurs on any output channel, that whole group of 8 switches off.
This approach protects the output driver from damage during field wiring faults.
Importantly, power cycling the module is not required to reset after a fault condition.
Once you remove the fault, the Honeywell 900H32-0302 resumes normal operation automatically.
Electronic limiting replaces physical fuses, eliminating fuse replacement downtime.
For troubleshooting, the module's diagnostics help identify the faulty channel group.

Load Current Ratings and Capacities

The 900H32-0302 handles substantial load currents across its 32 outputs.
Each individual point can carry up to 0.5 A of continuous load current.
For incandescent lamp loads, the module supports 0.25 A per point with 5 mH maximum inductance.
Each channel group of 16 outputs can handle up to 6 A total current.
Across the entire module, the Honeywell Digital Output 24 VDC supports 12 A maximum for resistive loads.
For inrush current, the module tolerates 2 A for up to 10 milliseconds.
This inrush capability suits loads with high initial current draw, such as lamps.
The minimum load requirement is 0.0 mA, so no minimum load resistor is necessary.

Leakage Current and Off-State Performance

When the output is OFF, the 900H32-0302 exhibits very low leakage current.
Maximum leakage current measures only 0.15 mA at 32 VDC supply voltage.
This low leakage prevents unwanted activation of sensitive field devices.
For applications with high-impedance loads, this specification proves especially important.
The Honeywell 900H32-0302 maintains excellent off-state isolation between channels.
Thus, you can use this module with solid-state inputs and high-resistance relays.
The peak voltage rating of 32 VDC provides a safety margin above the nominal 24V supply.

Response Times and System Performance

The 900H32-0302 delivers fast response times for demanding control applications.
OFF to ON response time measures 6 ms for the output channel itself.
Similarly, ON to OFF response time also measures 6 ms for consistent performance.
Note that these response times exclude the controller's scan time.
Additionally, the response times exclude transmission time from the module to the backplane.
Therefore, total system response will be slightly longer than the 6 ms specification.
For most industrial processes, the Honeywell Digital Output 24 VDC provides ample speed.
High-speed applications may require consideration of the total system delays.

LED Indicators and Status Reporting

The 900H32-0302 includes comprehensive LED indicators for each output channel.
A green LED state indicator for each channel illuminates when the digital output is ON.
This per-channel indication simplifies troubleshooting in the control cabinet.
For module status, a green blinking status LED indicates when the module is under scan.
When module diagnostics exist, a red status LED alerts the operator to issues.
Thus, you can quickly identify both channel-level and module-level problems.
The Honeywell 900H32-0302 requires a Euro style 36-terminal terminal block for field wiring.
This terminal block provides secure connections for all 32 outputs and power supplies.

Failsafe State Configuration Options

The 900H32-0302 supports failsafe state configuration for safe system behavior.
You can configure the module to Hold Last State before a communication loss.
Alternatively, you can configure the module to apply a predefined Failsafe State.
This flexibility allows you to design safe responses to network or controller failures.
For critical processes, setting a known safe state prevents hazardous conditions.
The Honeywell Digital Output 24 VDC maintains these settings across power cycles.
Thus, the module behaves predictably even after unexpected power interruptions.

Environmental Specifications and Temperature Range

The 900H32-0302 operates reliably across a wide temperature range.
Operating temperature spans from -40 to 70°C for extreme industrial environments.
Storage temperature extends from -40 to 85°C for warehousing flexibility.
These extended operating temperatures suit outdoor or unheated control cabinets.
The Honeywell 900H32-0302 withstands cold startup conditions without issues.
For hot environments, the module maintains performance up to 70°C ambient.
This temperature tolerance reduces the need for air conditioning in control rooms.
Consequently, you can deploy this module in diverse climate conditions worldwide.

Installation Guidelines for the 900H32-0302 Module

Follow these steps to install the Honeywell Digital Output 24 VDC (900H32-0302) correctly.

1. Mount the Euro style 36-terminal terminal block on a DIN rail.

2. Insert the 900H32-0302 module into the terminal block carefully.

3. Connect external 24 VDC power to the +V and COM terminals for each group.

4. Wire field devices to the 32 output channel terminals.

5. For incandescent loads, respect the 0.25 A per point limit.

6. Apply power to the module and observe the status LEDs.

7. Configure the failsafe state (Hold Last State or Failsafe State) in software.

8. Test each output channel individually for proper switching.

9. Verify short circuit protection by creating a temporary fault condition.

10. Monitor the red status LED after fault removal for automatic reset.

Only qualified automation technicians should install this output module.

Package Contents for the Honeywell 900H32-0302

• One Honeywell 900H32-0302 digital output module

• Euro style 36-terminal terminal block for field wiring

• Module labeling strip for channel identification

• Installation and configuration manual

Common FAQs About This Honeywell Digital Output Module

Q1: What happens when a short circuit occurs on an output?
A1: When any output channel on the 900H32-0302 short circuits, its entire group of 8 channels switches off. After removing the fault, the module resets automatically without power cycling.

Q2: Does this module require external fuses for each output?
A2: No, the Honeywell Digital Output 24 VDC (900H32-0302) uses electronic current limiting. Physical fuses are not necessary, which eliminates fuse replacement downtime.

Q3: What is the difference between high side and low side switching?
A3: The 900H32-0302 uses high side switching, meaning the output switches the positive supply voltage. Low side switching would switch the ground or common connection instead.

Q4: Can I power the two output groups from different voltage sources?
A4: Yes, the Honeywell 900H32-0302 provides galvanic isolation between the two groups. Each group has separate +V and COM terminals for independent power connections.

Q5: What do the blinking green and red status LEDs indicate?
A5: A blinking green LED on the 900H32-0302 indicates the module is under scan. A red status LED indicates that module diagnostics have detected a fault condition.

Typical Applications for the Honeywell 900H32-0302

The Honeywell Digital Output 24 VDC (900H32-0302) excels in discrete output control applications.
You can use it for solenoid valve control in process automation systems.
Similarly, the module works well for motor starter and contactor activation.
For indicator lamp and annunciator panel driving, this module proves ideal.
Material handling systems benefit from the 32 high-density output channels.
The 900H32-0302 also suits HVAC damper and valve actuator control.
In short, any application requiring 24 VDC sourcing outputs fits this module.

Ordering and Logistics Information

This Honeywell 900H32-0302 digital output module ships from our global distribution center.
Original factory packaging protects this I/O module during transit.
For volume pricing on Honeywell 900 Series products, please contact our team.
Before placing an order, verify your terminal block compatibility and power requirements.
For urgent production line needs, we offer express shipping options worldwide.