This part of ISO 16844 specifies the electrical connection between the recording unit, and the vehicle network and motion sensor, in tachograph systems used in road vehicles.
ISO 16844-2:2004 history
2022ISO 16844-2:2022 Road vehicles — Tachograph systems — Part 2: Recording unit communication interface
2011ISO 16844-2:2011 Road vehicles - Tachograph systems - Part 2: Electrical interface with recording unit
2004ISO 16844-2:2004 Road vehicles - Tachograph systems - Part 2: Recording unit, electrical interface