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+--- Thread: Digital Input B8M Voltage Range? (/showthread.php?tid=8594)
Digital Input B8M Voltage Range? - coconut - 10-01-2025
Hi,
is it ok to directly attach 14V Signals (from car) to the digital inputs of B8M? If not, can I reduce the signal with a voltage-divider to <5V and then attach to DI1-8?
Thanks from switzerland!
RE: Digital Input B8M Voltage Range? - admin - 10-02-2025
14v is ok for B8M, but not suggest for long time, because usually use by 12v.
RE: Digital Input B8M Voltage Range? - coconut - 10-02-2025
(10-02-2025, 03:00 AM)admin Wrote: 14v is ok for B8M, but not suggest for long time, because usually use by 12v.
1. In this case, what would be the maximum permanent voltage on the digital input?
2. Do I need to add transient supression or is it already included.
3. Can you share schematic of input circuit?
Thanks!
RE: Digital Input B8M Voltage Range? - admin - 10-02-2025
sorry, B8M 14v is ok, max is 24v. B8 max is 12v.
RE: Digital Input B8M Voltage Range? - coconut - 10-02-2025
(10-02-2025, 05:40 AM)admin Wrote: sorry, B8M 14v is ok, max is 24v. B8 max is 12v.
Are the inputs protected against transient spikes in automotive environment or do I have to add it myself?
RE: Digital Input B8M Voltage Range? - admin - 10-02-2025
suggest add protect by yourself.
RE: Digital Input B8M Voltage Range? - cherylcole - 11-26-2025
Directly connecting 14 V signals from a car to the B8M digital inputs is not recommended, as the DI pins are usually designed for 5 V logic and can be damaged by higher voltages.