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The Allen-Bradley 1785-L20B is a PLC-5/20 Series B processor module featuring 16K words of battery-backed SRAM for reliable memory retention. It supports up to 512 total I/O points, configurable as any combination or complementary input/output pairs. Communication capabilities include one DH+ channel and one DH+/Remote I/O channel, allowing flexible integration with various networked devices. The module accommodates up to 13 I/O chassis total, with 12 remote chassis supported, making it suitable for medium-scale industrial control applications.
| Manufacturer | Rockwell Automation |
| Brand | Allen-Bradley |
| Part Number/Catalog No. | 1785-L20B |
| Series | PLC-5/20 Series B |
| Module Type | Processor Module |
| User Memory | 16K Words SRAM |
| Maximum Total I/O | 512 points (any mix or complementary) |
| Communication Channels | 1 DH+, 1 DH+/Remote I/O |
| Maximum Number of I/O Chassis | 13 total (12 remote) |
Ships within 48 hours · Estimated delivery Jul 4 - Jul 9
US$40
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