Hardware Specifications8
Main Serial Port
The Main Serial port is a standard RS232 port. Valid speeds are 150 – 19200 BPS.
Aux Serial Port
The Aux port is a standard RS232 port. Valid speeds are 150 – 19200 BPS.
As mentioned in the ‘Internal Jumpers’ section, depending on the setting of CN11 either 5v or Vin
will be present on pin 4 of the RJ11.
Power Connector
The power connector is a standard 2.1mm DC Jack with center negative polarisation.
External Interface
The external DB15 connector gives complete access to the Opto-Inputs, relays and power rails. This
means that an external device can usually be connected to an MB20 V6 without the need to open
the unit and set jumpers. There will however still be rare occasions when input jumpers will have to
be set.
The opto-inputs are rated from 5 to 24v and are non-polarised unless jumpers have been
purposefully set to earth one side.
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