The Allen-Bradley 1764-24BWA is a part of the MicroLogix 1500 Programmable Controller Base Unit series. Together with a Bulletin 1764 processor, it completes a controller and is a component in the assembly of MicroLogix 1500 Systems. The 1764-24BWA is an independently replaceable unit that allows the embedded I/O options to be maximized while the inventory stocking costs are minimized. It contains the power supply, channel-0 communications port, and embedded inputs and outputs. The Bulletin 1764-24BWA Base Unit allows advanced communications with other devices via its Channel 0 port. It serves as an expansion I/O interface as required by an application. It comes with eight standard and four fast 24 Volts DC inputs and four 20 kHz high-speed inputs. The 1764-24BWA base requires a processor to function, it is compatible with either the 1764-LRP or 1764-LSP.
It has a 120 to 240 Volt AC-rated power line and 12 relays (two of which are isolated). It has an 88 VA power consumption, a 22 Watt maximum load power, and a power supply voltage of 85 to 265 Volts AC at 47 to 63 Hertz. It also has a 24 Volt DC Power Sensor specified at 400 mA(2) or 400 μF capacitance maximum, a powerful feature not available in other base units. The 1764-24BWA Base has product certifications for CE, C-Tick, UL, c-UL, and Class I Division 2 Hazardous Location operation. It slides together with the Bulletin 1764 Processor to form the complete controller. This assembly should not be mounted near power lines.