Allen Bradley1772LWPMini-PLC-2/17 Processor Module with Integral 120/220 V AC Power Supply, 7.75K Memory, 512 I/O, Series C

Product Description

What this part is

Allen-Bradley 1772-LWP Mini-PLC-2/17 processor module with integral power supply, Series C Revision J. Controller Platform: PLC-2. Product Type: programmable controller processor with an on-board chassis power supply. Memory Capacity: 7.75K words. Maximum I/O: 512 points. Backplane Output: 4 A at 5 V DC. Mounting Type: 1771 chassis. Unit Quantity: 1 Pc.

Decoding the designation

1772 — the Mini-PLC-2 processor family, which runs the same 1771 I/O rack hardware as the larger PLC-2 processors.

LW — the Mini-PLC-2/17 processor, the 512-point member of the family.

P — the execution carrying the integral 120/220 V AC power supply, which feeds the chassis backplane from the processor itself.

Series C — the third hardware revision of the module, the latest of the range.

Rev J — the firmware revision level carried on this unit.

Electrical data

Input Voltage: 97 to 132 V AC, or 194 to 264 V AC, switch selectable. Input Frequency: 47 to 63 Hz. Nominal Input Power: 96 VA. Output Voltage: 5 V DC. Output Current: 4 A to the backplane.

What these specs mean in practice

Maximum I/O: 512 points. Twice the capacity of the Mini-PLC-2/16, which is the step that lets one Mini processor cover a whole line rather than a single machine.

Memory Capacity: 7.75K words. That is the total program and data space, and it is the number that decides whether an existing PLC-2 program will load without editing.

Timers and Counters: up to 488. The count sizes the sequencing work a single processor can hold.

Input Voltage: 97 to 132 V AC or 194 to 264 V AC, switch selectable at 47 to 63 Hz. One catalogue number covers North American and export plant supplies without a separate rack supply module.

Output Current: 4 A at 5 V DC. The processor feeds the backplane itself, and that figure is the budget every I/O module in the chassis draws against — a 74 mA discrete input card is light against it, a 1.5 A intelligent module is not.

Instruction Set: program control instructions, relay-type instructions, data manipulation and comparison, and three-digit arithmetic covering addition, subtraction, multiplication and division.

Front panel and diagnostics

Mode Selection: keyed front-panel switch. Indicators: front-panel diagnostic LEDs reporting processor, memory and power status. The key switch fixes run and program mode at the module, so a mode change is a physical act on the panel.

Mounting data

Mounting Type: 1771 chassis. Module Dimensions: 4.5 in by 12.3 in. Reference documentation: Rockwell publication 1772-UM008, Mini-PLC-2/02, 2/16 and 2/17 Processor manual.

Quantity and configuration

Unit Quantity: 1 Pc. One processor module with its integral power supply.

Interchange guidance

Manufacturer Status: discontinued. Part Number: 1772-LWP. MPN Variants: 1772LWP, 1772 LWP, PLC-2/17, Mini-PLC-2/17. The 1772-LW is the same Mini-PLC-2/17 processor supplied for a separate chassis power supply, and the 1772-LWD is the extended-memory execution, so both are related processors rather than drop-in equals for this catalogue number. The 1772-LXP is the 256-point Mini-PLC-2/16 processor with an integral supply. Series B and Series C of the 1772-LWP share the 7.75K memory, the 512-point capacity and the same integral supply.