Honeywell 900H32-0302 32-Channel 24 VDC Digital Output

Honeywell 900H32-0302 32-Channel 24 VDC Digital Output Module

Product Introduction

The Honeywell 900H32-0302 delivers 32 current-sourcing digital outputs for DC loads from 10.5 VDC up to 32 VDC. Each channel includes a green LED state indicator. A blinking green status LED shows normal scanning, while a red LED signals diagnostic conditions. This module requires a Euro style 36-terminal terminal block. Additionally, it supports a fail-safe state with "Hold Last State" or a predefined safe value.

Key Technical Specifications

Outputs and Grouping
The 900H32-0302 offers 32 independent high-side driver outputs. These outputs split into two galvanically isolated groups of 16 channels each. Every group has its own pair of screw terminals for +V and COM connections. Therefore, you can power each group from different external DC supplies.

Voltage and Current Ratings
Operating voltage ranges from 10.5 VDC to 32 VDC, with a peak rating of 32 VDC. Maximum load current reaches 0.5 A per point, 6 A per channel group, and 12 A total per module for resistive loads. For incandescent lamp loads, the maximum is 0.25 A per point with 5 mH inductance.

ON Voltage Drop and Leakage
The ON voltage drop is only 0.15 VDC at 0.5 A load, ensuring efficient power delivery. Maximum leakage current stays very low at 0.15 mA under 32 VDC. The minimum load requirement is 0.0 mA, giving you great flexibility for various applications.

Overcurrent Protection
Electronic overcurrent protection is integrated into the output driver. The 32 channels divide into 4 groups of 8 channels each. If a short circuit occurs on any output channel, the entire group of 8 channels switches off. Importantly, power cycling is not required to reset the module after a fault condition. This feature saves significant downtime.

Response Time
OFF to ON response time is 6 ms maximum. Similarly, ON to OFF response time is also 6 ms maximum. Note that these values exclude controller scan time and backplane transmission delays.

Mechanical and Environmental Information

Extended Temperature Range
The Honeywell 900H32-0302 operates from -40°C to 70°C and stores from -40°C to 85°C. This extended operating temperature range makes it suitable for harsh industrial environments.

Status LEDs
A green LED per channel lights up when the output is ON. A blinking green status LED on the module confirms scanning activity. A red status LED indicates a module diagnostic condition.

Fail-Safe State Configuration
This module supports two fail-safe behaviors: Hold Last State or a predefined Failsafe State. You can configure this behavior to enhance system safety during communication errors.

Terminal Block Requirement
The 900H32-0302 requires a Euro style 36-terminal terminal block. This terminal block is not included with the module and must be ordered separately.

Installation Guidelines

Mounting
First, ensure the backplane power is off before installation. Then, insert the Honeywell 900H32-0302 into an appropriate I/O slot. Press firmly until the module locks in place.

Wiring
Each of the two groups has a dedicated pair of screw terminals for +V and COM. Connect external DC power supplies to these terminals. For output wiring, connect each load between the output channel and the common return. The module uses high-side switching, meaning the output sources current to the load.

Frequently Asked Questions (FAQ)

1. Can I power the two groups of the Honeywell 900H32-0302 from different voltage sources?
Yes, each group has separate +V and COM terminals. You can use two different DC supplies, even at different voltages within the 10.5 to 32 VDC range.

2. What happens when a short circuit occurs on one output?
The protection shuts down the entire group of 8 channels containing that output. After correcting the short, the group automatically resumes normal operation. No power cycling is required.

3. Does this module work with 12 VDC systems?
Absolutely. The operating voltage range is 10.5 to 32 VDC, so 12 VDC systems are fully supported.

4. What terminal block do I need for the 900H32-0302?
This module requires a Euro style 36-terminal terminal block. You must order it separately because it does not come with the module.

5. How do I know if a channel is active?
Each channel has a dedicated green LED. When the output is ON, its corresponding LED lights up. Additionally, the module status LED blinks green during normal scanning.