MSEL Master Relay, Руководство пользователя

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8
Resetting the Device
Once the device has been triggered by one of the 5 faults (external kill, driver kill, CAN kill,
over-current kill or over-temperature kill) the device will remain in the off state until reset. The
LED indicator will show the current fault as outlined in
LED Indicator States .
Once the fault has been remedied the device can be reset by cycling the driver kill switch off
and then back on.
Load Dump Protection
The Master Relay has on board circuitry that will help protect sensitive electronic devices in
the event of a shutdown during engine operation. The PDM output will be turned off
immediately therefore stopping the engine. However, the battery is not disconnected until the
alternator is no longer charging. This avoids the situation where the alternator may still be
generating as the battery is disconnected, resulting in voltage spikes as large as 120V that
can damage sensitive electronic components.
The Master Relay has a 5 second timeout where by even if for some reason the battery is still
being charged it will be disconnected regardless (this can be extended by specifying a longer
shutdown delay, see
Shutdown Delay ).
Shutdown Delay
The Master Relay can be programmed to delay switching the battery power off to allow for
diagnostic data logging. The shutdown delay is in addition to the load dump protection delay
described in Load Dump Protection . Therefore, the battery is guaranteed to be connected for
the duration of the shutdown delay, except for an over current event where the battery is
disconnected immediately to prevent potential damage.
The recommended procedure for this is to use a PDM or ECU to shut down the engine and
disable everything except the data logging systems. This allows these devices to receive the
shutdown event information and store it before shutting down.
The table below indicates the recommended delay times for different data logging systems:
Table 4: Recommended shutdown delay times
Data Logging Device Shutdown Delay
All MoTeC products 1.0 seconds
All devices are shipped with no additional shutdown delay, in order to activate this feature
please request it at the time of purchase, or program the desired delay as described in
Changing the CAN Baud Rate & Shutdown Delay.