42 110 | HIMA 24 VDC Discrete Logic I/O Module

Overview

The 42110 is a high-reliability discrete interface module developed for HIMA programmable electronic systems. It facilitates the bidirectional flow of logic signals between field instrumentation and the safety controller. Specifically engineered for mission-critical automation, this VDC logic card provides the necessary isolation and signal conditioning required for SIL-rated safety loops. Its ruggedized design ensures stable performance in extreme temperature gradients, making it a preferred choice for decentralized control in demanding process environments.

Specifications

• Model Identification: 42110

• Equipment Category: PLC Discrete I/O Module

• Logic Voltage Reference: 24 VDC (Nominal)

• Discrete Input Current: 10 mA per channel

• Discrete Output Rating: 500 mA (Short-circuit protected)

• Operational Temperature Range: -40°C to +70°C

• Storage Temperature Limits: -40°C to +85°C

• Response Characteristic: Low-latency logic switching for safety-critical tasks

• Environmental Protection: Designed for installation in controlled industrial enclosures

• Physical Weight: 0.14 kg (0.30 lbs)

• Mounting Integration: Compatible with HIMA system-specific rack or baseplate architectures

Reliability and Environmental Performance

Unlike standard commercial I/O modules, the 42110 is built to withstand significant thermal stress without logic degradation. The -40°C start-up capability is vital for upstream oil and gas or outdoor terminal applications. The 500 mA output capacity is specifically rated to drive standard safety relays, pilot lights, and low-power solenoids directly, reducing the need for interposing hardware and simplifying the overall safety circuit design.

Technical FAQ

What type of field devices are compatible with the 42110?The 42110 is designed for 24 VDC binary signals, including limit switches, pushbuttons, and proximity sensors for inputs, as well as signaling devices and control relays for outputs.

Does this module require external fusing for the outputs?The module features internal electronic protection; however, following HIMA's safety manual guidelines, external per-channel fusing is often recommended to isolate field-side faults and maintain system availability.