Hitachi LYD000A Digital Input DI Card

Hitachi LYD000A Digital Input DI Card

LYD000A is a digital input DI card for Hitachi DCS/PLC control system, compatible with Hitachi LY series rack mounted control system, and used with terminal board TD000A.
The core function of LYD000A is to collect various discrete switch signals such as dry contacts, limit switches, relay status, valve feedback, pump start stop status, etc. on site, complete signal filtering, isolation and conditioning, and upload the on-site status signals to the main control CPU for logic operation, interlock judgment, and SOE event recording; LYD000A is the core I/O board for switch signal acquisition in power plant, chemical, and metallurgical process control systems, ensuring reliable signal acquisition for equipment status monitoring and protection interlock circuits.

Product features

1. 32 high-capacity digital input channels, supporting 220V AC contact signals, suitable for commonly used AC feedback circuits in domestic power plants and chemical industries.
2.  Grouping electrical isolation design, a single channel failure will not affect the collection of other channels, and has strong anti-interference ability.
3.  The hardware filtering circuit can be configured to suppress on-site contact jitter and AC circuit interference, avoiding signal false triggering.
4.  Support SOE event sequence recording, which can accurately capture the timing of interlocking actions and facilitate accident review and analysis.
5.  Standard rack plug-in structure, used in conjunction with TD000A terminal board, for convenient wiring and maintenance.
6.  The board is coated with three anti coatings to prevent moisture and dust, and is suitable for dust and strong electromagnetic interference conditions in power plants, metallurgy, chemical industries, etc.
7.  Each channel is equipped with a disconnection diagnosis, and actively reports a fault alarm when the contact circuit is disconnected.
8.  Equipped with status indicator lights, power, operation, and channel faults are displayed intuitively, making on-site inspections and troubleshooting convenient.
9.  Belonging to Hitachi’s classic discontinued spare parts, with a large number of existing industrial devices in use, it is a commonly used card for repairing and replacing old systems.
10.  The backplane bus communication is stable and seamlessly compatible with CPUs, AO/DO/AI modules of the same series.

Main product range

• Control system (DCS/PLC/CNC): panel controller, HMI and human-machine interface, industrial PC, CPU processor module, communication module, analog/digital I/O module
• Drive and motion control: frequency converter, servo drive, servo motor, power module
• Robot spare parts: key spare parts such as robot control board, axis computer, servo unit, I/O module, etc
• State monitoring and safety system: vibration monitoring system, safety instrumented system (SIS), redundant controller

Application Industry

The products are widely used in various industrial fields such as metallurgy, oil and gas, petrochemicals, electricity, power transmission and distribution, water conservancy, water treatment and environmental protection, coal mining, aluminum industry, glass manufacturing, paper and printing, textile printing and dyeing, machinery manufacturing, electronics manufacturing, automobile manufacturing, plastic machinery, boiler heating, energy, etc.

Hitachi LYD000A Digital Input DI Card

Main brand

————————Shenzhen Changxin Automation Equipment Co Ltd -————————

Products that have been released are welcome for consultation. Due to the wide variety of models, we were unable to upload physical images one by one!

Parameter Specifications