Discover the versatility of the OC32 accessory controller

OC32 – one module, endless possibilities.

The OC32 accessory decoder from VPEB is much more than a classic switch decoder. While a regular decoder is often limited to switching a few turnouts or lights, the OC32 offers no less than 32 programmable outputs that you can use for lighting, servos, motors, and animations.

Whether you want to switch signals, realistically dim street lighting, or use servos for movable scenery: with the OC32, you have everything in one powerful module.

The OC32 is an electronic module that allows you to control various accessories on your model railway or miniature world. With 32 universally deployable outputs, this module is very versatile and replaces its predecessor, the OM32 serial, with even more extensive capabilities. You can directly control servo motors and bidirectional DC motors, whereas the OM32 required additional circuits.

The OC32 is also future-proof: thanks to the built-in bootloader, you can easily install software updates and upgrades yourself as soon as new functionalities become available.

Advantages of the OC32 compared to conventional switch decoders

1. Many more Outputs

Standard switch decoder: 4–8 outputs.
OC32 accessory decoder: no less than 32 outputs on one board. Compact, powerful, and cheaper per connection.

2. Suitable for all Types of Accessories

The OC32 can not only switch lights or coils, but also:

LEDs and signal images (including fading and afterglow).
Servos “” (up to 32 servos can be connected directly).
DC motors for movements or animations.
Turnouts and uncouplers with automatic shutdown.
Effects such as flashing railroad crossings, campfires, or flickering fluorescent lights.

3. Fully Programmable

With the U485J in combination with the OC32 Configurator software, you can set everything yourself:

Servo speeds and end positions.
Dim and fade effects.
Blink frequencies.
Random animations for extra realism.

4. Multiple Protocols for Maximum Flexibility

DCC: directly usable as a digital accessory decoder.
RS485: ideal for long distances and interference-free communication.

5. Future-proof

The OC32 is equipped with a bootloader, allowing you to easily load software updates yourself. New features and improvements are always available.

Applications of the OC32 accessory decoder

With the OC32, you bring your model railway to life:

Switch signals with realistic light behavior.
Operate turnouts and uncouplers safely.
Make railroad crossings blink.
Gradually turn on street lighting at “evening setting”.
Use servos for doors, barriers, or turntables.
Create special effects like flickering lights or a campfire.

Why choose the OC32?

The major advantages of the OC32 accessory decoder:

✅ One module for everything – lights, motors, servos, and animation.
✅ Space-saving – 32 outputs instead of multiple separate decoders.
✅ Realistic behavior – fading, dimming, and 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 accessory decoder for anyone who wants more than simple switching.

Servo control with the OC32

Servo control The OC32 offers both simple servo control and dynamic control. The simple control includes:

Configuration of the servo motor’s range (the center position and maximum deflection);
Setting the position (128 positions). The servo motor moves directly to the specified position.

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 range of real-world situations can be accurately simulated. Some examples:

Slowly switching a turnout or opening/closing a gate;
Semaphore signals and barriers with slow operation and self-determined swing effects;
A door of a shed or garage that bounces back a few times against an end stop when closing. When opening, the door swings a few times around an end position;

The possibilities are virtually endless.