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Honeywell 900H01-0102 Digital Relay Output Module

Configured for discrete relay switching in Honeywell ControlEdge HC900 Controller System platforms, the Honeywell 900H01-0102 (900H01-0102 Digital Relay Output Module) provides direct physical electrical execution for field device control circuits.

Hardware Specifications

Parameter	Specification
Model	900H01-0102
Brand	Honeywell
Origin	USA
Module Type	Digital Relay Output Module
System Compatibility	Honeywell ControlEdge HC900 Controller System
Output Channels	8 relay output channels
Relay Configuration	4 Form-A and 4 Form-C electromechanical relays
Output Contact Type	Dry relay contacts
AC Voltage Rating	Up to 250 VAC
DC Voltage Rating	Up to 30 VDC
Current Rating	Up to 4 A per relay channel
Isolation	Channel-to-logic and channel-to-channel isolation
Hot Swap Support	Supported under controller operating conditions
Status Indication	Individual channel LEDs and module status LED
Backplane Current	Approximately 140 mA at 5 VDC and 100 mA at 24 VDC
Operating Temp	0 deg C to +60 deg C
Storage Temp	-40 deg C to +85 deg C
Relative Humidity	5% to 95% non-condensing
Dimensions	Approximately 137 x 38 x 151 mm
Weight	Approximately 0.3 kg to 0.4 kg
Power Consumption	Approximately based on backplane current loading

Process Control Relay Interface Characteristics

The Honeywell 900H01-0102 integrates relay switching functions with the ControlEdge HC900 I/O architecture. It provides eight isolated relay channels for direct connection to discrete field loads. Additionally, the mixed Form-A and Form-C relay arrangement allows normally open and changeover contact configurations within the same module.

The module supports channel-to-channel isolation to reduce electrical interaction between independent field circuits. Furthermore, the relay outputs provide programmable output behavior during controller communication interruptions, including hold-last-state or predefined OFF-state execution.

For Honeywell process control applications, the module supports isolated discrete signal handling rather than analog loop communication. Therefore, it operates independently from 4-20 mA HART input processing and FOUNDATION Fieldbus device interfaces used by other HC900 I/O modules.

Frequently Asked Questions

Q: Does the Honeywell 900H01-0102 support hot-swapping?
A: Yes. The module supports removal and insertion under power when installed within a compatible ControlEdge HC900 rack configuration. Follow controller procedures before replacing hardware.

Q: How are relay channels isolated on the 900H01-0102?
A: The module provides channel-to-logic and channel-to-channel isolation to separate field relay circuits from internal controller electronics.

Q: What type of loads can the relay outputs control?
A: The relay contacts can switch discrete field devices such as solenoid valves, alarms, contactors, and motor starter control circuits within specified voltage and current limits.

Field Installation Guidelines

Install the Honeywell 900H01-0102 module only in a compatible ControlEdge HC900 rack slot. Verify rack power status and controller configuration before module insertion.

Connect field wiring according to the relay contact arrangement, including Form-A normally open contacts and Form-C changeover contacts. Keep relay output wiring separated from low-level analog signal cables to reduce electrical noise coupling.

Terminate cable shields according to the site grounding standard. Use appropriate protective devices when switching inductive loads such as contactors or solenoid valves to limit transient voltage effects.

Confirm channel LED status after installation and verify each relay output operation through the controller configuration software before placing the connected field equipment into service.

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