A-B 1785-L30B Controller PLC-5/30 Standard Processor

Description

Allen-Bradley 1785-L30B is an Allen-Bradley PLC5 controller: The Allen-Bradley 1785-L30B is an Allen-Bradley PLC5 controller. The controller has 32K words of user memory and supports 1024 (any mix) or 1024 inputs + 1024 outputs (complementary). It has embedded communication ports such as two (2) DH+/Remote I/O (adapters or scanners) and one (1) serial port that can be configured for RS-232 and 423 and RS-422A standards.

About the 1785-L30B

The 1785-L30B is an Allen-Bradley controller that is part of the PLC5 controller family. The controller has 32K words of user memory, two (2) DH+/Remote I/O combo ports that can be configured as adapters or scanners, and one (1) serial port that supports RS-232. 423. and RS-422A communication standards.

The 1785-L30B supports a large number of I/O devices. It supports up to 1024 I/O devices, which can consist of any combination of discrete and analogue I/O devices. In addition, it supports complementary 1024 input and 1024 output devices.

In addition to supporting a large number of I/O devices, the controller is also capable of implementing a remote I/O architecture, as it can connect up to 28 remote I/O racks. To implement remote I/O architecture, integrated communication ports such as DH+ and Remote I/O (RIO) channels can be used. In addition, an Ethernet interface module can be added to realise the same architecture via an Ethernet network.

The 1785-L30B is fitted with a battery that will be available for use by the controller in the event of a power failure. The battery is used to hold user and programme data stored in the controller's user memory. It is equipped with a BATT LED to report the current level of the battery. For the 1785-L530B, the battery will last 84 days at 100% shutdown and 150 days at 50% shutdown at an operating temperature of 60 degrees Celsius. When the BATT LED is on, the battery will continue to operate for 5 days from the first appearance of the signal. When the battery is fully depleted, the contents of the user memory will remain unchanged unless the controller is powered on. The contents of the user memory are erased only when power is lost and the battery is depleted.

The 1785-L30B has two built-in ports such as Channel 1A and Channel 1B. These ports can be configured as Remote I/O Scanners, Remote I/O Adapters, and DH+ communication interfaces. In addition, the 1785-L30B controller provides a 25-pin connector serial port interface. The serial port supports the RS232C standard and can be configured for system protocols such as ASCII and DF1. full-duplex and half-duplex master protocols, and half-duplex slave protocols. An 8-pin miniature DIN connector labelled Channel 1A is also available and also supports DH+ connectivity.

The 1785-L30B has several indicator lights on the front panel for easy interaction with the user. These indicators are labelled BATT and are used to show battery status. The indicator labelled PROC indicates the status of the controller. the FORCE indicator is used to show whether or not the I/O force is enabled. the COMM indicator is connected to channel 0 and is used to report communication activity, while channels 1A and 1B both have dedicated status indicators.

The controller has a three-position pushbutton switch to set the controller mode. Each position corresponds to one of the processor modes, such as Run, PROG, and REM In Run mode, the controller executes the program and activates the output devices PROG stops the execution of the logic and allows the controller to be configured and programmed REM executes the logic and allows configuration and programming.

The 1785-L30B has 32.000 words of memory and a battery backup. For programme backup, an EEPROM module can be installed in the front panel slot. Memory modules are available in various capacities.The total number of I/Os (including local I/O and general-purpose remote I/O combinations) is 1024 in any combination, or 1024 inputs and 1024 outputs complementary.A total of 29 I/O chassis are available for the 1785-L30B, of which 28 are general-purpose remote I/O chassis. The 1785-L30B has a backplane current load of 2.3 amps at 5 volts. 1785-L30B cannot be connected to an expansion local I/O chassis.

1785-L30B Frequently Asked Questions

How many remote racks does the 1785-L30B support?

The controller supports up to 28 remote I/O racks.

Does the controller support Data Highway Plus (DH+) communications?

Yes, it supports DH+ as well as remote I/O and RS232 standards.

What is the memory capacity of the 1785-L30B?

The 1785-L30B has 32K words of user memory.

Technical Description of the 1785-L30B

Allen Bradley PLC 5 PLC-5/30 Standard processor, 1024 max analogue inputs/outputs, 32K words, 2.3 amps backplane current (at 5 volts).