The OC32 from VPEB is much more than a classic switching decoder. Where a standard decoder is often limited to switching a few turnouts or lights, the OC32 offers no less than 32 extensively configurable outputs that you can use for signals, traffic lights, turnouts, lighting, servos, motors, relays, etc. In short, basically everything you encounter in your miniature world.
The OC32 can be controlled as a DCC accessory decoder from any digital station that supports DCC. But at the same time, you can also control the OC32 directly from a PC with suitable software, integrate it into a Dinamo or Dinamo/MCC system, combine it with systems for an extremely realistic day/night simulation, or simply let it function completely independently. And the OC32 can be controlled interactively with discrete inputs, such as switches and push buttons. The OC32 is therefore not only very powerful in what you can control with it, but also very flexible in the way you want to control it all.
Many electronic control modules are intended for one specific task. And you often buy such a module for that task, such as controlling a few turnouts, making the lights of your level crossing flash, or controlling a few signals. And then, depending on the signaling system, you sometimes also need a specific version of such a decoder. Need a new function? New decoder!
The OC32 offers a completely different approach to controlling accessories in your miniature world. You don’t have to wonder what you want to control, nor what you want to control it with. At most, you might wonder how much you want to control. You easily configure the OC32 for the specific tasks you expect from the module, even if those tasks change or when new tasks are added.
For the novice user, there is an extensive collection of standard configurations. In OC32 terms, we call these “device definitions”. You simply choose which “device” (signal, turnout, traffic light, etc.) you want to connect to which outputs of the OC32. The experienced user has the option to fully customize the OC32 through extensive configuration.
Bring your model railway to life with the OC32:
The OC32 is equipped with a bootloader, allowing you to easily load software updates yourself. New features and improvements are therefore always available.
The OC32 does not (yet) control:
Actually, we can only think of one: Once you start using the OC32, you’ll keep coming up with new things in your miniature world that you can control with it. So there’s a risk you’ll constantly run out of outputs.
The major advantages of the OC32 accessory decoder:
✅ One module for everything – light, motors, servos, and animation.
✅ Space-saving – 32 outputs instead of multiple separate decoders.
✅ Realistic behavior – fading, dimming, dynamic servo control, random effects.
✅ Flexible and expandable – always updatable via software.
✅ Robust and versatile – multiple protocols and compatible with existing systems.
👉 In short: the OC32 is the ultimate accessory decoder for anyone who wants more than simple switching.
Servo control The OC32 features both simple servo control and dynamic control. Simple control includes:
The dynamic control of the OC32 is based on a physical model: the model of a mass on a spring with damping. By varying the parameters of this model, a wide variety of real-world situations can be simulated very realistically. Some examples:
The possibilities are virtually endless.
An interesting possibility offered by the OC32 is “turnout multiplexing”. This works for all standard twin-coil drives, for turnouts, but also for semaphore signals driven by them. Normally you use 2 outputs per turnout, one for straight and one for diverging. With multiplexing, you can control up to 32 turnouts (so 64 coils) with only 16 OC32 outputs—that’s only half an OC32!
To make wiring easy, MDdec connection boards are available. You simply connect your turnout drives to these as you are used to: with 3 wires each.
Some things you want to control require complete electrical isolation between the control and the device being controlled.
Examples include:
Despite all technical progress, the easiest and most economical solution is often simply… a relay.
To make their application easy, VPEB has a number of compact relay modules in its range, which you can of course easily connect to an OC32 module. Not fancy, but very handy:
Module with housing
Module without housing, with mounting frame
Relay module
Relay module
Connection module for OC32s to USB
Relay module
Relay module
For controlling Charlieplex signals
With plugs
For motors and 2-wire solenoid actuators
With screw terminals
For 3-wire solenoid coils
Galvanically isolated inputs
Connection module for 4 servos
ADM/CPX connection board
