Looking for a way to enhance the functionality of your PLC? Choose this I/O expansion module from Siemens. It accepts supply voltages of 115 and 230V AC/DC, so is ideal for use in low-power systems. As it has four digital inputs and four relay outputs, it's a versatile choice. For enhanced safety, an IP20 rating means the unit's finger-safe and protected against tools and wires larger than 12mm. You'll commonly find a module like this one used in building management systems and monitoring equipment.

• Designed for mounting on a DIN rail for ease of installation
• Wide operating temperature range of 0°C to +55°C for use in demanding environments

Relay outputs can handle both AC and DC loads, while transistor outputs can only handle DC loads. This makes relay outputs a more versatile option.

This I/O module has compact dimensions of 90 (H) x 35.5 (W) x 58mm (D), so it helps to maximise packing space on your DIN rail.