Product Summary
The Allen-Bradley 1785-L30B is a powerful PLC-5 controller ideal for mid-scale automation. It features 32K words of battery-backed memory. This unit handles up to 1024 I/O points in any mix. The controller supports complementary configurations of 1024 inputs plus 1024 outputs. You get robust communication with two DH+/RIO ports and one serial port.
Why Choose the 1785-L30B for Your System?
Procurement managers need reliable hardware for complex tasks. The 1785-L30B solves critical pain points with its flexible I/O architecture. You can utilize up to 29 total I/O chassis. This includes 28 universal remote I/O chassis for distributed control. The controller provides a maximum analog I/O count of 1024. This makes it suitable for both discrete and analog process control.
The integrated DH+ network allows peer-to-peer communication. The serial port supports RS-232, RS-423, and RS-422A standards. You can configure this port for ASCII, DF1, or master/slave protocols. This connectivity reduces the need for extra communication modules. The controller also features an expansion port for a control coprocessor. This adds computational power for complex tasks like PID loops.
Expert Technical Evaluation of the 1785-L30B
From an engineering perspective, this controller delivers strong performance. The processor scans a single I/O rack in just 3 milliseconds. This speed occurs at a 230.4 kbits/s baud rate. This ensures fast response times for critical control loops. The operating temperature range spans from 0 to 60 degrees Celsius. This allows deployment in typical industrial enclosures without extra cooling.
The backplane current draw is only 2.3 amps at 5 Volts DC. Total power dissipation measures just 12 Watts. This low power consumption reduces heat buildup in the chassis. The three-position key-switch provides secure mode selection. You can lock the controller in Run, Program, or Remote modes. The front panel indicators give clear status for battery, processor, force, and communication. The battery backup retains memory for up to 150 days. You can also install an EEPROM module for permanent program storage.
Logistics & Standard Packaging Details
