1785-L20B/E

Product Overview

1785-L20B/E is an Allen-Bradley PLC-5 controller module with 16 Kwords user memory, supporting extensive local and remote I/O.

I/O Capacity

• Max total I/O: 512 (any mix) or 512 in + 512 out

• Max analog I/O: 512

• Remote I/O chassis: 12

• Max I/O chassis total: 13

• I/O scan time per rack: 10 ms @ 57.6 kbits/s, 7 ms @ 115.2 kbits/s, 3 ms @ 230.4 kbits/s

Memory & Backup

• User memory: 16 Kwords

• Battery-backed static RAM: Yes

• EEPROM program backup: Yes (using 1785-ME16, ME32, ME64, M100)

• Protected memory: No

Communication Interfaces

• Embedded ports: 1 DH+ (fixed), 1 DH+/Remote I/O (adapter or scanner), 1 serial port (RS-232/422/423)

• Control coprocessor expansion port: Yes

Power

• Backplane current load: 2.3 A

• Power dissipation: 12 W

• Compatible power supplies: 1771-P4S, P6S, P4S1, P6S1

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