Advantech ADAM-5511 Manual page 41

dedicated as the RS-485 port. This unique design makes the controller
suitable for use in a variety of applications.
3-way isolation and watchdog timer
Electrical noise can enter a system in many different ways. It may enter
through an I/O module, a power supply connection or the communica-
tion ground connection. The ADAM-5511 system provides isolation
for I/O modules (3000 V
and communication power connections (3000 V
isolation design prevents ground loops and reduces the effect of
electrical noise on the system. It also offers better surge protection to
prevent dangerous voltages or spikes from harming your system. The
system also has a watchdog timer to monitor the microprocessor. The
watchdog timer automatically resets the microprocessor in the ADAM-
551 if the system fails.
•
CPU: 80188-40, 16-bit microprocessor
•
Flash ROM: 256 KB (system use only)
•
Operating system: ROM-DOS
•
Flash disk: 512 KB (400 KB free space for users)
•
SRAM: 12 KB battery backup free memory for users
•
Timer BIOS: Yes
•
Real-time clock: Yes
•
Watchdog timer: Yes
•
COM1(3F8): RS-232
•
COM2(2F8): RS-485
•
Programming port (RS-232 interface, DB-9 connector): Tx, Rx, GND
), communication connections (2500 V
DC
). The 3-way
DC
),
DC