Allen Bradley


Allen Bradley


The 1764-24BXB base unit is used in compatibility with the legacy Allen Bradley 1764 MicroLogix controller family. The 1764 MicroLogix is a PLC platform designed for micro and small automation requirement in a wide variety of industries.

The base unit 1764-24BXB is a DIN Rail or Panel mounted modules that is used to provide backplane connection and attachment to 1764 MicroLogix components and accessories. The module has an internal electronic circuitry that when supplied with a 20.4 to 30V dc line supply range, provides power to the backplane which activated the corresponding circuitry of the attached modules to enable them. Compatible modules for the base unit include Data Access Tool, Real-Time clock, Memory and MicroLogix Controllers 1764-LSP and 1764-LRP. The base unit comes with an onboard 16 inputs capable of sink/source wiring configuration. This 16-input are further made with 8 Standard 24VDC and 8 Fast Input for high speed inputs, totalizers, pulse signals with switching frequency of 20kHz. The onboard output channels are 12 output points composed of 6 relay output, 4 Standard 24VDC FET Transistors and 2 Fast output with a frequency of 20kHz. The base unit house the MicroLogix modules especially the controllers 1764-LSP and 1764-LRP. The Height dimensions differ when the latch is open or closed. It has dimensions of Height 138 mm (5.43 in.) - Latch open; 118mm (4.65 in.) - latch closed; Width168 mm (6.62 in) and Depth (87 mm (3.43 in). The base unit can support horizontal installation only through a DIN rail or direct panel mounting. Always allows 50 mm (2inch) clearance on all sides for ventilation. The 1764-24BXB has 3 input groups, groups 0-2 with each group having a common terminal - DC COM 1, DC COM 2 and DC COM 3. The first Input group is through I/0 to I/3, I/4 to I/7 and I/8 to I/11. Additionally, the output also come in groups of 4. Ensure environmental specifications have been met in the installation area. The base unit can operate at a vibration rating of 10 to 500 Hz, 5G, 0.030 in. max. peak-to-peak and for Relay Operation, 2G. The MicroLogix 1764 Family is configured using RSLogix500 software.

Part Number 1764-28BXB
Product Type Controller
Inputs 16
Outputs 12
Line Power 20.4-30V DC
Power Supply Usage 30 W
Power Supply Inrush 24V dc = 4A for 150 ms
Input Circuit Type 24V dc, sink/source
Open Circuit Type 6 relay, 6 FET transistor
On-state Voltage Range 10-30V DC
Manufacturer: Rockwell Automation
Brand: Allen-Bradley
Product Family: MicroLogix
Product Type: Base Unit
Part Number: 1764-24BXB
Supported CPU: 1764-LSP; 1764-LRP
Power supply: 120/240V ac
Power Supply Usage: 70 VA
Power Supply Inrush: 120V ac = 25A for 8 ms 240V ac = 40A for 4 ms
Number of I/O 16 Input; 12 Outputs
Input Circuit Type: 120 VAC
Output Circuit Type: 6 relay, 6 FET transistor (24V dc source)
Operating Temp: +0°C to +55°C (+32°F to +131°F) ambient
Storage Temp: -40°C to +85°C (-40°F to +185°F) ambient
Operating Humidity: 5% to 95% relative humidity (non-condensing)

Distribution Cache Shipping Info and Options

Shipping Carriers: Here at Distribution Cache we ship using UPS, FedEx, DHL, or TNT. In most cases we get very competitive rates based on our volume and will be happy quote shipping cost to your location upon request. We also know that many customers would prefer to ship collect on their own account numbers and welcome this option.

Shipping Blind: We recognize that many of our customers intend to re-sell the product to their end user. We respect our customer’s relationships with their clients and offer blind shipping as an option to ensure that the package arrives in the most clandestine way possible.

Shipping Process: We take pride in the way we package your order and spare no cost in making sure that it arrives safely at your facility. In the case of new parts, we are always sure to package the factory box inside another larger box for safe transit. For reconditioned parts we often use Distribution Cache customized packaging that is specially made to protect the products from the bumps and falls present during shipment.


Shipping Options:

Next Day Air Early AM - This service is the fastest overnight delivery option available. For most locations the package will be guaranteed by 8:30AM.

Next Day Air – This service guarantees delivery by 10:30AM and is the most frequently used option for overnight shipments.

Next Day Air Saver – This cost saving overnight alternative guarantees delivery by 3PM the next day.

2nd Day Air – For domestic shipments that would take 3-5 days if shipped via Ground, sometimes having the order in 2 days is a great way to go

Ground – Ground is the most inexpensive shipping option provided. Please ask if we are doing a “free domestic ground” shipping promotion on your order. We often provide free ground shipping on larger orders.


Emergency Courier – At times we can help work with a courier service to get the part to your facility during downtimes scenarios. We prefer that the customer sets up the courier but we can be there to make sure the product is handed off to the driver. Please give us a call to see if this is an option on your order.

Please Note: Products listed as “ships today” can ship same-day if an order is placed before 4PM. For larger drives and motors we ask that notification for same-day shipments be provided by 2PM at the latest. For any products listed as “ships in 3-5 days”, please give us a call to see if this can be expedited.