Schneider ASBDEP256C PLC Module | 256KB Flash, 16/16 I/O

Technical Specifications

Parameter	Value
Brand	Schneider
Model	ASBDEP256C
Category	PLC Module
Weight	0.52 lbs (0.24 kg)
Dimensions	4.1 x 3.0 x 2.4 inches
Component Count	88 discrete components
Memory Type	Flash + SRAM
Program Memory	256KB flash
Data Memory	32KB SRAM
Processing Speed	0.5 µs per boolean instruction
Digital Inputs	16 channels (24V DC)
Digital Outputs	16 channels (24V DC, 0.3A)
Communication Ports	1 x RS-232, 1 x RS-485
Operating Voltage	24V DC from backplane
Current Draw	85 mA at 24V DC
Energy Storage	3 x 100µF capacitors
Backup Battery	3V lithium (5 years life)

Physical Construction and Component Layout

This ASBDEP256C PLC module measures 4.1 inches in height. Its width reaches 3.0 inches with a depth of 2.4 inches. The total weight comes to approximately 0.52 pounds. Manufacturers placed 88 discrete components on this compact PCB. These components include a CPU, memory chips, optocouplers, and power regulation circuits. The small form factor saves valuable space in control cabinets.

Memory Architecture and Processing Power

ASBDEP256C provides 256KB of flash memory for user program storage. An additional 32KB of static RAM handles real-time data and variables. The processor executes boolean instructions in just 0.5 microseconds. This speed supports fast logic scanning for demanding applications. A 3V lithium battery backs up the SRAM contents. This battery lasts for approximately five years under normal use. Consequently, the module retains data through extended power outages.

I/O Capabilities and Communication Ports

The PLC module integrates 16 digital inputs for field devices. These inputs accept 24V DC signals from switches or sensors. For outputs, the module provides 16 digital channels. Each output delivers 24V DC at 0.3 amps maximum. Two communication ports support external device connections. One RS-232 port connects to programming software or HMIs. One RS-485 port links to Modbus networks or remote I/O. Therefore, the ASBDEP256C handles both local control and network communication.

Energy Storage and Application Use

ASBDEP256C integrates three 100µF electrolytic capacitors on the power input. These capacitors smooth voltage dips from the 24V DC supply. The module draws only 85 milliamps for low heat generation. You will find this module in small to medium automation systems. For example, it controls conveyors, packaging machines, or batch processes. The unit operates reliably from 0°C to 55°C ambient. Therefore, this PLC module delivers dependable logic control for factory automation.