1785-L20B

Overview

The Allen-Bradley 1785-L20B PLC-5 Controller is a standard processor designed for various industrial applications.

Environmental Specifications

• Non-Operating Temperature: –40...85°C (–40...185°F)

• Operating Temperature: 0...60°C (32...140°F)

I/O Capabilities

• Remote I/O: 12 chassis

• Maximum Number of I/O Racks: 4 (0-3)

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

• Max Analog I/O: 512

• I/O Scan Time Per Rack: 10 ms at 57.6 kbits/s, 7 ms at 115.2 kbits/s, 3 ms at 230.4 mbits/s

• Max I/O Chassis Extended Local: 0

• Max I/O Chassis Total: 13

• Max I/O Chassis Universal Remote: 12

Memory and Battery

• Battery: 1770-XYC

• Memory: 16 Kwords

• Max User Memory Words: 16 Kilowords

• Battery-Backed Static RAM: Yes

• EEPROM Program Backup Option: Yes (using 1785-ME16, -ME32, -ME64, and -M100)

• Protected Memory: No

Embedded Communication Interfaces

• 1 DH+: Fixed

• 1 DH+/Remote I/O: Adapter or Scanner

• 1 Serial Port: Configurable for RS-232 and 423 and RS-422A standards

Power and Performance

• Backplane Current Load: 2.3 A

• Power Dissipation: 12 W

• Power Supply: 1771-P4S, -P6S, -P4S1, -P6S1

Other Specifications

• Product Type: Programmable Logic Controller

• Product Family: PLC5

• Module Type: Standard Processor

• Processor: PLC-5/20

• RS-232-C/422-A/423-A Ports: 1

• Control Coprocessor Expansion Port: Yes

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