10201/2/1 Fail-Safe Digital Output Module | Honeywell

The Honeywell 10201/2/1 is an 8-channel fail-safe digital output module designed for high-integrity safety applications in industrial automation systems. It provides short-circuit proof 24 VDC solid-state sourcing outputs capable of driving resistive loads, such as indicator lamps, and inductive loads, such as solenoids, up to 13 W per channel.

Fail-Safe Testing and Inductive Load Protection

To support safety-critical applications, the module performs comprehensive diagnostic self-tests. Integrated testing verifies the module's ability to de-energize individual channels and de-energize the output group via secondary safety means, while continuously monitoring for crosstalk between channels. Each output incorporates an internal suppression diode for inductive load protection, which is actively monitored during functional testing.

Electrical Ratings and Channel Specifications

Each of the 8 output channels supplies 24 VDC at a maximum current of 550 mA, with a maximum lamp load rating of 120 mA (2.9 W) and a maximum allowable load capacitance of 1 uF. The output stage maintains a low voltage drop under 2.0 VDC at 500 mA and an off-state leakage current below 0.1 mA. External 24 VDC supply current is 70 mA without load, complemented by 5 VDC (25 mA) and internal 24 VDC (25 mA) logic power requirements.

Mechanical Integration and Key Coding

Occupying a rack footprint of 4 HP (4 TE) by 3U (3 HE), the module dimensions measure 3 × 20 × 15 cm (1 × 8 × 6 in). Mechanical keying prevents improper module insertion using module code holes at A9 and C9 alongside corresponding large rack pins. The module requires system software version 3.00 or higher.

Frequently Asked Questions

Q: What type of field loads can the Honeywell 10201/2/1 drive?

A: It drives resistive loads (such as indicator lamps up to 120 mA / 2.9 W) and inductive loads (such as solenoids up to 13 W / 550 mA) via internal suppression diodes.

Q: How is physical mis-insertion prevented in the rack chassis?

A: The module uses a hardware keying arrangement with module code holes at positions A9 and C9 matching large rack pins on the backplane.