Device
and operation
CPC307
C P C 3 0 7 U s e r M a n u a l
116
© 2 0 2 2 F a s t w e l v . 0 0 6
Annex A
List of changes in the module version 4.
х
1. Switching of bias resistors for RS-422/485 ports has been changed.
2. Integrated drive capacity has been increased to 2 GB.
3. Additional XP27 jumper for reset of BIOS settings has been implemented BIOS.
4. Protection against polarity reversal, short-circuit while supplying power through additional power
connector XP22 has been implemented.
5. Soft start is arranged to reduce starting current. Active overvoltage protection up to 30V is
implemented when power is supplied via additional power connector.
6. Switching diagram of matching resistors of CAN ports has been changed.
7. In versions older than 4.x, the WDT2 watchdog can be switched off by setting the jumper to the
XP26 connector. In module versions 4.x, the opposite is true: placing a jumper on the XP26
enables the WDT2 watchdog, while removing the jumper disables it.
8. There are two copies of BIOS stored in the module (for versions older than 4.x) - main and
backup. When you turn on the power supply the module always boots from the main BIOS copy. If
the external watchdog in the ADM706T power supply supervisor chip is activated the module will
restart. There is no backup copy of the BIOS for the 4.x versions of the module.
9. In version 4.x the BIOS updating procedure has been changed.
10. In version 4.x, if the XP24[2-3] jumper is installed, the onboard drive is disabled. There was no
such feature in 3.x versions.
11. The DDR2 RAM frequency has been increased to 333 MHz (was 266 MHz).