Choose this analogue input module from Siemens to unearth faults and track down errors in your industrial automation setup. Its eight analogue channels measure current and voltage to keep track of the power flowing through your equipment. LED indicators are on hand to signal the unit's operating status and alert you to issues as they pop up, so no time's wasted in fixing them. Inbuilt reverse polarity protection stops electrical damage in its tracks. For resistance to corrosion and contaminants, this unit is treated with a special conformal coating. You'll find a module like this one used in process control and sensing applications.

• Compact dimensions of 147 (H) x 35 (W) x 129mm (D) for installation in tight spaces
• Safe for use at temperatures between -40°C and +70°C in a horizontal installation and between -40°C and +40°C in a vertical installation, so it stands up to harsh conditions
• Low power loss of only 1.9W for energy efficiency
• Light weight of 280g to put minimal strain on your equipment

It has a supply voltage of 24V DC, so it's a sure bet for low-power systems.