Veichi PLC — VC and VH series controllers for machine automation
Veichi PLCs are used in packaging lines, machine tools, dosing, pumping stations and motion systems where a compact controller with built-in communication and a broad range of expansion modules is required. The catalogue covers compact VC1 and VC1S, networked VC3 with CANopen and Ethernet, the VC3M and VC5 motion controllers, the VH300/VH500/VH600 EtherCAT line, plus VC, VM and VH expansion modules.
How to choose a Veichi PLC
Start by counting the discrete inputs/outputs and the output type: relay (R) for slow loads and AC switching, transistor NPN/PNP (T) for high-speed pulses, encoders and drives. Then check the supply voltage — MA-suffixed units run on 220V AC, MD on 24V DC. For simple cabinets pick VC1 or VC1S, for CANopen/Ethernet networking pick VC3, for coordinated drive motion pick VC3M, VC5 or the VH EtherCAT line.
| Product | Series | Key specs | Application |
|---|---|---|---|
| VC1-0806MAR | VC1 | 220V AC, 8 inputs / 6 relay outputs | Compact cabinets, ventilation, pumps, simple machines |
| VC1S-0808MAR | VC1S | 220V AC, relay outputs, economy line | Budget machines, dosers, conveyors |
| VC3-1616MAR | VC3 | CANopen + Ethernet, relay outputs | Networked lines, exchange with VFDs and HMIs |
| VC3M-1616MDT | VC3M | 200kHz pulses, motion functions | Positioning, servo and stepper drives |
| VC5-1616MAT-8 | VC5 | EtherCAT, up to 8 motion axes | Coordinated motion, complex motion tasks |
| VH511-0808TN | VH500 | EtherCAT, up to 8 axes | High-performance motion, drive synchronisation |
Outputs: relay or transistor
A relay output switches both AC and DC up to a few amps but has a limited switching life and cannot produce fast pulses. A transistor output (NPN or PNP) is made for high-speed pulse control — counters, PTO generation for steppers and servomotors. On VC1, VC3 and VC5 the transistor models offer several 100–200kHz pulse channels, letting you drive motion axes without a separate controller.
Expansion modules and communication
Main modules accept analog inputs/outputs (VC-4AD, VC-4DA, VM-4AD), temperature modules for thermocouples and RTDs (VC-4TC, VC-4PT), weighing and communication modules. The VM-RTU-PN and VH-RTU-ECT bus modules connect the controller to Profinet and EtherCAT networks. The VH series uses left-side modules with a real-time clock (RTC) for time-stamped tasks.
Compatibility with Veichi drives
Veichi PLCs work together with the same maker's frequency inverters and servo drives over RS-485 (Modbus RTU) and CANopen, which simplifies setup and diagnostics within a single ecosystem. This is convenient when the cabinet is built entirely on Veichi equipment.
