Be20 Be20A Be20B Diesel Engine Generator Controller: replace it with Be24
Product Overview & Replacement Guide
Obsolete Models: Be20, Be20A, and Be20B
Recommended Replacement: Be24 (Available in stock!)
Original Manufacturing Period: 1984 to 2004
The Be20 (including the Be20A and Be20B variants) is a combined auto-start and key-start compact module specifically designed for diesel engine control and protection. These units were reliably manufactured and deployed from 1984 to 2004. Because these legacy controllers are now obsolete, the Be24 is the best available direct replacement option currently in stock to ensure seamless operation and modern reliability for your generator set.
Looking for original documentation?
You can purchase or access historical reference material and guides for the legacy Be20 by following the link below:
Be20 Be20A Be20B Installation Manual 4.90€
Technical Features & Architecture
The BE20 includes the essential safeguards required to protect a diesel engine. Built for reliability, the unit features:
2 Push Buttons (including the dedicated [AUTO] pushbutton)
8 Diagnostic LEDs
3 Output Relays
2 Static Outputs
30A Key Switch
Din 96 Size
Variant Differences & Compatibility
BE20B Monitoring: Specifically monitors an oil pressure switch, temperature switch, fuel level switch, charger alternator voltage, and an emergency switch.
Operating Modes: Provides a MANUAL operating mode via the 30A key switch and an AUTO operating mode via the [AUTO] pushbutton (note: the AUTO mode requires an external pilot relay to drive the starting attempts).
Interchangeability: The Be20, Be20A, and Be20B are fully compatible with one another, with the only physical difference being the shape of the key.
Need a Modern Replacement?
Because these units are now obsolete, the Be24 is your best available option currently in stock.
BE20 BE20A BE20B CONTROLLER REAR VIEW
BE20 BE20A BE20B APPLICATION WIRING DIAGRAM
Replacing Your Controller: Step-by-Step Roadmap
Step 1: Take a clear, high-definition photo of your existing wiring connections using your mobile phone. (Keep this handy to send to us if you need technical support later).
Step 2: Disconnect the battery before starting any work.
Step 3: Remove all wires and replace the legacy controller with the Be24.
Step 4: Input Connections: The input connections are identical on the Be24—specifically terminals [1], [3], [4], [5], [6], and [7]. (Note: Depending on your setup, not all wires will always be connected).
Step 5: Horn Output: If terminal [2] is used and your horn draws more than 200mA, you must connect an external pilot relay to terminal [2].
Step 6: Solid-State Outputs: The outputs on the Be24 are solid-state. You must connect a pilot relay for terminals [10], [11], [12], and [13]. In a normal application, only terminal [10] is typically used, though some setups may require one or two additional relays.
Step 7: Power Connections: Connect the battery positive to +V and the battery negative to -V.
Step 8: Reconnect the battery. By leaving the factory default settings, the system will work immediately!
Step 9: Contact us if you need any technical support.
Purchase the Be24 Controller (164 € Free Shipping)
BERNINI DESIGN SRL
Zona Industriale,
46035 Ostiglia, Italy
bernini@bernini-design.com
+39 335 70 77 148