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Allen Bradley GuardPLC 1754-L28BBB

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1754-L28BBB

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The Allen-Bradley 1754-L28BBB Safety Controller in the GuardPLC 1200 series has 20 Digital Inputs and a 500 KB application code memory User Memory. The 1754-L28BBB operates with a 24V DC Nominal Input Voltage and a 10-30V DC On-state Voltage.

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Not an Authorized Distributor: DO Supply is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All of our products come with DO Supply's 2-year warranty.
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Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

Technical specifications for 1754-L28BBB

ManufacturerAllen Bradley
Product TypeSafety Controller
Product LineGuardPLC
Part Number1754-L28BBB
Weight1.00 lbs (0.45 kg)
Product SeriesGuardPLC 1200
User Memory500 KB application code memory
Digital Inputs20
Nominal Input Voltage24V DC
On-state Voltage10-30V DC
On-state Current2 mA @ 10V DC
Outputs8
Output Voltage Range18.4-26.8V
Output Current0.5-2A per channel
Counters2
Inputs per Counter3
Counter Resolution24 bit
Power Supply24V DC
UPC10612598284440
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The Allen-Bradley 1754-L28BBB is a 28 I/O safety controller. It is one of Allen-Bradley’s GuardPLC 1200 Control System devices. It is built according to the IEC 61508 (SIL 3) and ISO 13849-1 (PLe/Cat. 4) standards to feature a fail-safe CPU. This controller is used to detect faults that can cause loss of safety functions within the safety time you program. The Allen-Bradley 1754-L28BBB reacts differently to different kinds of errors but it always tends to react in a safety-related way. The controller performs actions when it detects controller errors, permanent errors, and transient errors.

The basic tools for processing safety logic modules on this device are 20 digital inputs, 8 digital outputs, and 2 high-speed counters. For communication and programming purposes it is equipped with an RS-232 serial port and an Ethernet port. On the front panel, users can watch inputs and outputs status over signaling lamps. There are also 6 more signaling lights - the RUN, PROG, ERROR, FORCE, FAULT, and COMM lights. Users can also access the backup battery compartment from the front side of the controller. The Allen-Bradley 1754-L28BBB must be supplied with 24 Volts DC power that can deliver at least 8 Amps. The dimensions of the controller are 160 x 112 x 90 millimeters (6.3 x 4.41 x 3.54 ). The item weighs 0.68 kilograms (1.5 pounds).

Revision Part #Also known as
1754-L28BBB Ser A1754-L28BBB/A, Series A, Rev A
1754-L28BBB Ser B1754-L28BBB/B, Series B, Rev B
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