The HollySys LT-e series remote io module provides high-speed, microsecond-level response for distributed control architectures. Designed with a slim 12 mm profile, it minimizes control cabinet footprint while supporting mainstream industrial fieldbuses including PROFINET, EtherCAT, and modbus gateway integration.
Modern industrial automation lines face severe bandwidth limits, dense signal routing constraints, and the risk of unexpected downtime from communication jitter. The LT-e series solves these challenges by combining high-density channel deployment with a rapid backplane communication architecture. Engineers can configure coupling modules like the LT-eIM01 for EtherCAT or LT-eIM02 for PROFINET, extending up to 64 modules via power relays. Signal integrity is maintained through channel-to-system isolation up to 1,000 VAC and comprehensive diagnostic logging for up to 100 events per module, ensuring predictable real-time control across complex machinery.
Technical Specifications
Coupler Module PROFINET: LT-eIM02 @ 24 VDC
Coupler Module EtherCAT: LT-eIM01 @ 24 VDC
Coupler Module EtherNet/IP: LT-eIM03 @ 24 VDC
16-Channel Digital Input NPN: LT-eDI01 @ 2.7 mA/CH @ 24 VDC
16-Channel Digital Input PNP: LT-eDI02 @ 2.7 mA/CH @ 24 VDC
32-Channel Digital Input NPN: LT-eDI11 @ 2.7 mA/CH @ 24 VDC
32-Channel Digital Input PNP: LT-eDI12 @ 2.7 mA/CH @ 24 VDC
8-Channel Relay Output: LT-eDO04 @ 230 VAC / 30 VDC
16-Channel Digital Output NPN: LT-eDO01 @ 0.5 A/CH @ 24 VDC
16-Channel Digital Output PNP: LT-eDO02 @ 0.5 A/CH @ 24 VDC
32-Channel Digital Output NPN: LT-eDO11 @ 0.5 A/CH @ 24 VDC
32-Channel Digital Output PNP: LT-eDO12 @ 0.5 A/CH @ 24 VDC
4-Channel Analog Input Voltage/Current: LT-eAI01 @ ±10 V @ 16-bit
8-Channel Analog Input Voltage: LT-eAI02 @ 0-10 V @ 20-30°C
8-Channel Analog Input Current: LT-eAI03 @ 4-20 mA @ 20-30°C
4-Channel Analog Output Voltage/Current: LT-eAO01 @ ±10 V @ 140 us/CH
8-Channel Analog Output Voltage: LT-eAO02 @ 0-10 V @ 16-bit
8-Channel Analog Output Current: LT-eAO03 @ 4-20 mA @ 16-bit
4-Channel RTD Input: LT-ePT01 @ Pt100/Pt1000 @ 200 ms/4CH
4-Channel Thermocouple Input: LT-eTC01 @ B/C/E/J/K/N/R/S/T @ 200 ms/4CH
Serial Communication Module: LT-eCM01 @ 2-Channel RS485 @ Modbus RTU
24V Power Relay Module: LT-ePM01 @ 24 VDC @ Overcurrent Protection
System Integration and Hardware Setup
Deploying the LT-e series inside a control enclosure requires careful attention to physical layout and backplane bus extension. Each coupler module supports up to 32 expansion slices directly on its right side, scaling up to 64 modules when incorporating the LT-ePM01 power relay module. Spring-clamp terminal blocks streamline field wiring without requiring specialized screwdrivers, significantly reducing assembly time during panel building.
Shielded twisted-pair cables should be used for all analog channels, such as the LT-eAI01 or LT-eAI03 modules, to prevent electromagnetic interference from nearby variable frequency drives. Grounding bars must be tied directly to the backplane mounting rail to maintain low-impedance paths for high-frequency noise dissipation. For serial communication setups utilizing the LT-eCM01 RS485 module, onboard DIP switches allow engineers to instantly toggle terminal matching resistors without external components.
Reliability and Environmental Durability
Industrial automation deployments demand robust hardware capable of withstanding thermal stress and continuous electrical loads. The LT-e series operates reliably within standard industrial temperature ranges, maintaining high measurement accuracy of 0.1% F.S. at 20°C to 30°C. Power relay modules feature built-in reverse polarity protection, undervoltage detection, and real-time voltage reporting to safeguard connected sensors and actuators against sudden grid fluctuations.
Maintenance overhead is reduced through modular pluggable designs, enabling technicians to swap faulty slices without disconnecting field wiring harnesses. Integrated diagnostic LEDs on every module display active status, channel faults, and communication states instantly. Furthermore, internal logging mechanisms capture up to 100 diagnostic events, helping maintenance personnel trace intermittent short circuits, wire breaks, or over-range conditions swiftly.
Selection Guidance and Alternative Options
Choosing the correct remote IO configuration depends heavily on the primary controller network architecture and the total point count required by the machine. For PROFINET-based controller environments, pairing a primary controller with the LT-eIM02 coupler and mixing high-density cards like the LT-eDI12 and LT-eDO12 optimizes cabinet space. When integrating legacy or multi-vendor serial instruments, the LT-eCM01 module serves as a reliable modbus gateway interface supporting both RTU and ASCII transmission modes.
Beijing Zhongping Technology provides comprehensive engineering support, offering complete bill-of-materials cross-referencing and localized stock availability to ensure seamless prototype development and rapid mass production deployment. Engineers can consult technical data sheets for specific module combinations, power supply calculations, and bus cycle time tuning parameters.
Frequently Asked Questions (FAQ)
1. What is the maximum number of expansion slices a single coupler can support?
A single coupler module supports up to 32 expansion modules directly on its right side, and up to 64 modules total when utilizing a power relay module.
2. Does the LT-e series support hot-swapping of expansion modules?
Yes, the mechanical design allows for pluggable maintenance, though system-level power considerations should be verified depending on the active IO type.
3. How are configuration files loaded into the coupling modules?
Engineering software imports standard GSD or XML device description files matching the respective protocol coupler, such as EtherCAT or PROFINET.
4. What communication protocols are natively supported by the coupler variants?
The series supports PROFINET, EtherCAT, EtherNet/IP, and Modbus TCP network communication via dedicated coupler part numbers.
5. Can the serial communication module handle third-party Modbus devices?
Yes, the LT-eCM01 features 2 channels of RS485 supporting Modbus RTU and ASCII master/slave protocols as well as free-format communication.
6. What is the resolution of the analog input modules like the LT-eAI02?
The analog input modules offer a high resolution of 16-bit across multiple voltage and current measurement ranges.
7. How does the system handle power distribution across multiple modules?
The LT-ePM01 24V power relay module injects supplementary power, monitors real-time voltage levels, and handles undervoltage or overcurrent protection.
8. Are diagnostic logs saved during unexpected power interruptions?
Individual digital and analog modules support internal diagnostic logging for up to 100 events to assist with troubleshooting transient site faults.
FAQ
1.Who are We?
Beijing Zhongping Technology Co., LTD., is a global industrial electrical automation service provider, is a scientific research, design, marketing, technical services, industrial Internet, international import and export services as one of the science and technology companies.
2.What can you buy from us?
PLC, inverter, human-machine interface, hydraulic products, low-voltage power distribution, industrial robots and core components
3.Is the item in stock or need to be purchased from another supplier?
We have a large inventory of goods and have our own warehouse.
4.What advantages do we have over other suppliers?
Our company has a large amount of inventory and a number of warehouses, but also in the country's important industrial provinces and cities with offices and a number of overseas service points. To provide you with intelligent manufacturing one-stop comprehensive services, save efforts, labor and cost.
5.Can you provide 100% new original authentic products?
We only sell new original genuine, no renovation, no fake, only for the original factory original!
6.How long is the delivery time?
If there is a stock, it will take 2-3 working days to ship, if the quantity is large, it will take 5-7 working days after receiving the payment, if it is not a conventional model, it will take some time, we will inform you of the specific delivery time.
7.Is there technical support available?
Of course, we have a professional technical team that can help you solve technical problems.
8.How do we guarantee quality?
We have three processes to control the quality of goods.
1) Our engineers will inspect the production and quality control in the factory regularly.
2) Incoming materials shall be inspected by experienced purchasing engineers before they can be stored.
3) At least 2 people in the logistics department cross-check the goods to be sent before delivery.
9.Can you guarantee the safe and reliable delivery of your products?
Yes, we strictly adopt the international standard packing. We also use special packaging for dangerous goods, and refrigerated shipping for items with temperature requirements. Special item packaging and general cargo standard packaging requirements may incur additional costs.
10.How about the freight?
The cost depends on how you choose to get the goods. Express is usually the fastest but also the most expensive way. Sea freight is the best solution for large quantities of goods. The exact shipping cost depends on the purchase amount、quantity and weight of your order. Please feel free to contact us for more information.
+86 010-64225983
+8613811814778
Building 26, Liyuan Community, Chaoyang District, Beijing, China
