Description

Manufacturer	Rockwell Automation
Product Type:	Programmable Logic Controller
Backplane current load:	2.3 A
Embedded Communication interfaces:	1 DH+ (Fixed) 1 DH+/Remote I/O (Adapter or Scanner) 1. serial port, configurable for RS-232, 423, and RS-422A standards.
Memory:	16 Kwords
Battery:	1770-XYC
Maximum Number of I/O Racks:	4 (0-3)
Remote I/O:	12 chassis
Operating Temperature:	EC 60068-2-1 (Test Ad, Operating Cold), IEC 60068-2-2. (Test Bd, Operating Dry Heat), IEC 60068-2-14 (Test Nb, Operating Thermal Shock): 0…60 oC (32…140 oF).
Non-Operating Temperature:	IEC 60068-2-1 (Test Ab, Un-packaged Nonoperating Cold). IEC 60068-2-2 (Test Bc, Un-packaged Nonoperating Dry. Heat) and IEC 60068-2-14 (Test Na, Un-packaged. (Nonoperating Thermal Shock) -40.85 o C (-40.185 o F).
Brand	Allen-Bradley
Power Dissipation:	12 W
Power Supply:	1771-P4S, -P6S, -P4S1, -P6S1
Part Number/Catalog No.	1785-L20B
Product Family:	PLC5

Module Type	Standard Processor
Processor	PLC-5/20
Max User Memory Words	16 Kilowords
Battery-Backed Static RAM	Yes
EEPROM Program Backup Option (using 1785-ME16, -ME32, -ME64, and -M100)	Yes
Protected Memory	No
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, and 3 ms at 230.4 mbits/s.
Max I/O Chassis Total	13
Max I/O Chassis Extended Local	0
Max I/O Chassis Universal Remote	12
RS-232-C/422-A/423-A Ports	1
Control Coprocessor Expansion Port	Yes
UPC	10612598123978

1785L20B Allen-Bradley