Meinberg GPS163TDHS - Manual (Page 18)

18
BSL Key
Whenever the on-board software must be upgraded or modified, the new firmware
can be downloaded to the internal flash memory using the serial port COM0. There is
no need to open the metal case and insert a new EPROM.
If the BSL key behind the front panel is pressed during operation, a bootstrap-
loader is actived and waits for instructions from the serial port COM0. The new
firmware can be sent to GPS163 from any standard PC with serial interface. A loader
program will be shipped together with the file containing the image of the new
firmware.
The contents of the program memory will not be modified until the loader program
has sent the command to erase the flash memory. So, if the BSL key is pressed
unintentionally, the firmware will not be changed accidentially. After the next
power-up, the system will be ready to operate again.
Assignment of the terminal block
The pulse outputs are available at the terminal block in the front panel. In addition,
the power supply is connected to GPS163 using two poles of this terminal block. The
marking besides the terminal has the following meaning:
Ub
Oc 1
Oc 2
Oc 3
+
+
+
+
-
-
-
-
Pulse generator
GPS163xHS
Channel 1
Channel 2
Channel 3
+ Ub positive potential of power supply
- Ub reference potential of power supply
+ OCx Collector of photocoupler
- OCx Emitter of photocoupler