HEM3801CR Harsh-Environment I/O Module
HEM3801CR is an intelligent, distributed I/O module designed for harsh environments, specifically tailored for demanding industrial applications.
It integrates 38 flexibly configurable input/output channels, supporting analog signals (0–32 V, 0–5 V, 0–20 mA, 0–2 kΩ), digital signals, and PWM. Equipped with a CAN 2.0B communication interface, it adds a wireless receiver module compared to the HEM3801C. This upgrade enables the HEM3801CR to retain all its original wired connectivity and control functions while introducing wireless data transmission and remote‑control capabilities, making it particularly well suited for demanding applications where wireless communication simplifies wiring or facilitates remote monitoring.
The module is housed in a robust plastic top cover and an aluminum alloy bottom case, achieving an IP67 protection rating. It operates reliably across a wide temperature range of –40°C to 85°C and offers exceptional resistance to vibration, shock, and electromagnetic interference, making it ideal for outdoor applications and high‑reliability industrial automation in construction machinery, agricultural equipment, special‑purpose vehicles, and other demanding environments.
Classification:
Products
IO module
Key words:
1. Core Product Positioning
HEM3801CR is a high-performance, highly reliable smart distributed I/O module designed for harsh industrial environments. It provides equipment manufacturers and system integrators with a compact, rugged, and highly flexible solution for remote signal acquisition and output control, ideally suited for outdoor or industrial settings characterized by vibration, wide temperature ranges, high humidity, and complex electromagnetic interference.
2. Key Features and Functions
2.1 Powerful Signal Processing Capability
Flexible channel configuration: The module provides a total of 38 signal channels and can be configured, as needed, with up to 16 inputs or 26 outputs, enabling dynamic resource allocation.
Comprehensive support for signal types:
Analog Inputs: Supports 0–32 V and 0–5 V voltage measurements, as well as 0–20 mA current measurements, all with 12-bit resolution and high accuracy (typical accuracy of 1%–2%).
Resistance Input: Supports resistance measurements from 0 to 2 kΩ.
Digital inputs: Support both high-level‑active (DIH) and low-level‑active (DIL) modes, accommodating sensors with different logic levels.
Digital/PWM Output: Multiple output channels support both high-level active output (DOH) and pulse-width modulation (PWM), with a PWM frequency range of 10 Hz to 2 kHz and control resolution up to 12 bits.
2.2 Robust Mechanical and Environmental Design
Structural materials: A combination of a plastic top cover and an aluminum alloy bottom case is employed, balancing lightweight design with thermal management and protective performance.
Protection Rating: The overall protection rating reaches IP67 (when sealed via connectors), effectively preventing dust ingress and brief immersion, making it suitable for dusty and humid environments.
Wide-Temperature Operation: Operating temperature range is –40°C to +85°C, with the same storage temperature range, ensuring stable performance in extremely cold or hot environments.
Ruggedness Certification: The product has successfully passed a comprehensive suite of electromagnetic compatibility tests, including low‑temperature, high‑temperature, shock, vibration, electrostatic discharge, electrical fast transient/burst, and surge tests, as specified by the GB/T standards series, demonstrating exceptional environmental robustness and reliability.
2.3 Reliable Communications and Power Supply
Communication Interface: Integrates one CAN 2.0B interface, with a configurable baud rate ranging from 20 kbit/s to 1 Mbit/s (default: 250 kbit/s). It employs a proprietary extended-frame protocol and supports node ID configuration (default: 0x10; configurable range: 0x10–0x17), facilitating the construction of distributed control system networks.
Wide‑range power supply: Supports a wide DC input range of 8–32 V, accommodating fluctuations in vehicle electrical systems or industrial power supplies.
Load Drive: Features an integrated internal load power supply (UBB) input to power the output channels, with a maximum continuous current of up to 7 A per digital output channel (UEE) and a maximum continuous current of 1.5 A for PWM outputs, enabling direct drive of actuators such as valves and low‑power motors.
2.4 Intelligent Diagnosis and Indication
Status Indicator: The module is equipped with a multi-color LED that clearly displays the system status:
Power indicator (green): A steady light indicates that the power supply is functioning normally.
Operating indicator (green): A 1 Hz blink indicates normal system operation; a steady light indicates a critical error.
Error indicator (red): A steady light indicates a critical system error.
Communication Indicator (Green): A 1 Hz blink indicates a CAN communication error; extinguished indicates normal communication.
3. Application Scenarios
Thanks to its robust environmental resilience and flexible I/O configuration, the HEM3801CR is ideally suited for the following applications:
Construction machinery: sensor signal acquisition and lighting, as well as hydraulic valve control, for excavators, cranes, road rollers, and more.
Agricultural equipment: monitoring the operating status of tractors and harvesters, and controlling their actuating mechanisms.
Special-purpose vehicles: distributed control for sanitation vehicles, fire trucks, and military vehicle‑mounted systems.
Industrial Automation: Used as a remote I/O station in factory automation production lines operating in harsh environments.
4. Connection and Installation
Connector System: The module is equipped with two 23‑pin connectors (Port A and Port B), utilizing AMP‑series automotive‑grade connectors. Paired with an injection‑molded wire harness system, this design ensures reliable connections while providing vibration resistance and preventing loosening.
Installation method: Mount using four M6×16 bolts, allowing for convenient attachment to equipment panels or brackets.
Accessory Support: A 0.5-meter standard cable assembly (model HP-005HEM3801C) is provided, with other lengths available upon request, along with a connector kit that includes a protective jacket, pins, and accessories, enabling users to deploy and connect quickly.
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If you have any needs, please contact the company's sales manager
Industrial Automation Industry: Liu Zhanjun
Contact number: +86-18890359678
Email: lzhj@hepauto.com.cn
Construction Machinery Industry: Wu Long
Phone: +86-18073052915
Email: long.wu@cspro.com.cn
Address: Building 13, Sanhe Zhihui Industrial Park, 426 Guyuan Road, Yuelu District, Changsha China