VH-0808ETP Veichi VH-0808ETP Expansion module: 8 inputs / 8 outputs, Transistor (PNP), compatible with the VH series.

VH-0808ETP is a mixed VH-series right-side expansion module: 8 discrete inputs plus 8 PNP transistor outputs. Same as VH-0808ETN but the outputs switch the positive — for a common-negative scheme. One housing covers both inputs and outputs, so it suits compact nodes and economical use of bus slots.

Typical applications:

• A self-contained control node: sensors on the inputs, valves and relays on the outputs.
• Small stations on a line that must both read and drive side by side.
• European common-negative schemes without reworking for NPN.

Note: the outputs are PNP, for a grounded negative. For a common positive take VH-0808ETN. If the point needs inputs only, VH-0800END; outputs only, VH-0008ETP.

Veichi VH-R — right-side expansion modules for the VH controller series

VH-R is not a standalone device but a set of right-side expansion modules for the VH300, VH500 and VH600 CPUs (and for the VH comms module). They add discrete inputs-outputs, analog, temperature measurement or weighing without changing the processor itself. The new expansion bus runs at up to 100 Mbps, so module traffic does not become a bottleneck even on fast machines.

Up to 16 right-side modules attach to one CPU. That lets you build exactly as many I/O points as the task needs: start compact and grow as the machine evolves. The module has no CPU of its own — it always works paired with a VH controller.

Which modules the VH-R series includes

• Digital output: transistor modules with 8 and 16 outputs, NPN or PNP — VH-0008ETN/ETP, VH-0016ETN/ETP.
• Digital input: modules with 8 and 16 inputs — VH-0800END, VH-1600END.
• Mixed I/O: 8 inputs plus 8 transistor outputs — VH-0808ETN/ETP.
• Analog and temperature: VH-4AD (4 analog inputs), VH-4DA (4 analog outputs), VH-4PT (4 Pt100 channels), VH-4TC (4 thermocouples), plus the VH-2WT weighing module.

How VH-R differs from VH-L and VH-RTU

In practice VH-R is the workhorse for I/O expansion: the right-side modules carry the bulk of a machine's inputs and outputs. VH-L is for a single left analog board, VH-RTU is for I/O spread across the equipment that you collect over the bus.

Which module to pick for which signal

• You only need the CPU with no expansion — see the VH300/VH500/VH600 controllers themselves.
• A left analog board or special function — that is the VH-L series.
• Remote, distributed I/O over the bus — take VH-RTU modules.
• Working in another brand's ecosystem — compare with Delta or Fatek.

Our experience with VH-R

VH-R right-side modules sell steadily together with VH CPUs — they are the natural way to tailor a configuration to a specific machine. The typical buyer question is how many modules to hang on one CPU and whether the bus copes: 16 right modules and 100 Mbps cover the vast majority of real machines. We suggest leaving room for 1–2 spare modules for future sensors. Customers often pair them with Veichi VFDs and Veichi operator panels on the same line.