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The controller also includes a real-time clock and a watchdog timer function. The real-time clock
ensures time recording while events occur. The watchdog timer is designed to automatically reset
the microprocessor when the system fails. This feature greatly reduces the level of maintenance
required and makes the ADAM-4500 ideal for use in applications that require a high level of
system stability.
1.2 Features
?? Built-in boot ROM-DOS to run PC programs
?? Free ROM/RAM memory for user's applications
?? 2-wire, multi-drop RS-485 networking
?? Communication speed up to 115.2 Kbps
?? RS-232/RS-485 modes (jumper selectable)
?? Automatic data flow control in RS-485 mode
?? Built-in real-time clock and watchdog timer
?? Easy mounting on a DIN-rail or panel
?? Program download cable and utility included
1.3 Specifications
System
?? CPU: 80188-40
?? Flash ROM: 256 KB (170 KB free memory for users)
?? Operating system: Boot ROM-DOS
?? SRAM: 256 KB ( 234 KB free memory for users)
?? Timer BIOS: Yes
?? Real-time clock: Yes
?? Watchdog timer: Yes
?? COM1: RS-232/RS-485
?? COM2: RS-485
?? Program download port (RS-232): Tx, Rx, GND
RS-232 Interface
?? Signals: TxD, RxD, RTS, CTS, DTR, DSR, DCD, RI, GND
?? Mode: Asynchronous full duplex, point to point
?? Connector: DB-9 pin
?? Transmission speed: up to 115.2 Kbps
?? Max transmission distance: 50 feet (15.2 m)
RS-485 Interface
?? Signals: DATA+, DATA-
?? Mode: Half-duplex, multi-drop
?? Connector: Plug-in terminal block
?? Transmission speed: up to 115.2 Kbps
?? Max transmission distance: 1220 m (4000 feet)
Power
?? Unregulated +10 to +30 V
DC
?? Protected against power reversal
?? Power consumption: 2.0 W