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1785-L80B Wiring

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  • 1785-L80B
  • 1785-L80B Wiring
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The Allen-Bradley 1785-L80B is a CPU module for PLC-5 programmable controllers. It is a modular component of a 1771 I/O system comprising an I/O chassis, a power supply, the CPU module, and various I/O modules. The 1785-L80B occupies one slot in the 1771 I/O chassis. The maximum user memory provided on the 1785-L80B is 100 K words. A slot for additional memory modules is provided on the 1785-L80B. The 1785-L80B supports a maximum of 3072 I/O (any mix) or 3072 outputs or 3072 inputs (complementary). The 1785-L80B supports a maximum of 24 I/O racks (with an address range of 0 to 27). The maximum number of I/O chassis supported are 93 (1 local plus 92 remote chassis).

Four DH+/Remote I/O (configurable for the adapter and scanner modes) are provided on the 1785-L80B. Four 3-pin ports (Channels 1A, 1B, 2A, 2B) can be configured for remote I/O scanners, remote I/O adapters, DH+, or unused. The default configuration for Channels 2A and 2B is “unused.” The default configuration of Channel 1A is for the  DH+ network at 57.6 kbps whereas the default configuration of Channel 1B is for the remote I/O scanner. One serial port that is configurable for the EIA RS-232 / RS-423 systems and it is compatible with the RS-422A system is also provided. The physical interface of the serial port is a D-shell with 25 pins. The default port configuration is set to 2400 bps, DF1 point-to-point, no parity, one stop-bit, and BCC error check. The default configuration enables processor programming. The 1785-L80B dissipates 17.3 Watts power as heat and it draws 3.3 Amps (at 5 Volts DC) from the backplane.

Other Automation PLC-5

SKU 2172366  UPC 0799705796386

AB PLC-5/80 Cntrlr. 100K Word SRAM 1785L 1785L8 1785L80

Troubleshooting and Product Information for 1785-L80B

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Other Automation
PLC-5 1785-L80B
Weight: 2 Lbs
Dimensions: 10"x12"x2"In
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