Programming ALLEN BRADLEY 1747-L553

Processor SLC 500 SLC 5/05, 64K Memory,
Ethernet & RS-232 communication ports.
User memory, max: 64K words total (60K words for data or scale, 4K words for data only);
Number of I/Os: 4096 in + 4096 out absolute maximum;
Local analog I/O, Max: 480;
Program scan time / Kword: 0.9 ms (typ);
I/O scan time: 0.225 ms (typ);
Number of local I/O frames, Max: 3;
Number of I/O Module Slots in the Local I/O Chassis, Max: 30;
Communication port: Ethernet & RS-232 (RS-232 port can also be configured for DH-485 network);
Backup memory: Flash;
Battery-backed RAM: Standard.