Schneider ASB881108 | 800-Series I/O Module

The Schneider ASB881108 provides reliable discrete I/O expansion for the 800-Series automation system. This module features 16 input channels and 16 output channels for balanced control applications. It operates on 24 V DC power for compatibility with standard industrial sensors. Weighing only 0.52 kg, the Schneider ASB881108 mounts easily on a DIN rail or panel. Its dimensions measure 125 mm x 90 mm x 65 mm.

Input Specifications and Channel Features

The Schneider ASB881108 accepts 24 V DC sinking inputs from field devices. Each input channel draws 7 mA at nominal voltage for reliable signal detection. The module filters electrical noise with a configurable 3 ms input delay. Moreover, it provides LED indicators for each channel to show active status. Consequently, you can troubleshoot field wiring quickly without a programming terminal.

Output Specifications and Protection Features

The Schneider ASB881108 delivers 24 V DC sourcing outputs for actuators and indicators. Each output channel provides 0.5 A of continuous current for driving small loads. The module includes built-in short-circuit protection on every output channel. Additionally, it features over-temperature shutdown to prevent damage during fault conditions. Therefore, the Schneider ASB881108 protects itself and your field devices automatically.

Technical Specifications Table

Below are the complete technical parameters for engineers and procurement teams:

Parameter	Specification
Full Product Name	Schneider ASB881108
Product Category	800-Series Discrete I/O Module
Number of Input Channels	16
Number of Output Channels	16
Input Type	Sinking (NPN)
Output Type	Sourcing (PNP)
Rated Input Voltage	24 V DC (19.2 V to 30 V DC)
Rated Output Voltage	24 V DC (19.2 V to 30 V DC)
Input Current per Channel	7 mA at 24 V DC
Output Current per Channel	0.5 A (500 mA)
Maximum Output Current per Module	8 A total
Input Filter Time	3 ms (configurable)
Output Response Time	< 1 ms
Protection Features	Short-circuit + over-temperature
Channel Isolation	1,500 V AC between field and logic
LED Indicators	32 (16 green for inputs, 16 green for outputs)
Current Consumption (5V DC)	200 mA from backplane
Current Consumption (24V DC)	400 mA external field supply
Power Dissipation	3.5 W maximum
Energy Storage	No battery (decoupling capacitors only)
Number of Components	1 main PCB + 32 optocouplers + 2 terminal blocks + housing
Net Weight	0.52 kg (520 grams)
Gross Weight (packaged)	680 grams
Dimensions (H x W x D)	125 mm x 90 mm x 65 mm
Wire Size (Terminal)	AWG 24 to AWG 14 (0.2 mm² to 2.5 mm²)
Operating Temperature	-10°C to +55°C
Storage Temperature	-40°C to +85°C
Degree of Protection	IP20
Certifications	CE, UL 508, CSA

Connector and Installation Details

The Schneider ASB881108 uses two removable screw terminal blocks for all field wiring. One terminal block handles the 16 input channels and common connections. The second terminal block manages the 16 output channels and power supply. The module requires an external 24 V DC power supply for output operation. Therefore, do not rely solely on backplane power for field devices. The Schneider ASB881108 suits conveyor systems, packaging machines, and material handling equipment. It also works perfectly for small to medium control cabinets where space matters. Thus, this compact I/O module delivers balanced discrete control for many industrial applications.