7KT5500 Siemens

What does this time counter do?

This unit is designed to record and display accumulated operating hours. It is typically used in control panels and electrical equipment where a visible, ongoing record of runtime is needed for monitoring usage and planning routine maintenance intervals.

What supply voltage does it require?

It is intended for DC operation and is specified for 10-80 V DC. This makes it suitable for a broad range of low-voltage DC panel applications.

Is the display analog or digital?

The counter works on an analog operating-hours principle rather than using a programmable digital interface. It provides a straightforward visual reading of elapsed hours.

Can the counter be reset?

No. According to the published specification, this model does not include a reset function, so it is intended to provide a permanent accumulated hours reading.

How many digits can be displayed?

The display provides 7 characters, allowing the operating hours total to be shown clearly over a long service period.

What mounting style does it use?

This is a front panel mounting design. It is built for installation into a panel face so the reading remains visible from the outside of the enclosure.

What panel cutout size is required?

The datasheet states a front panel cutout of 50.2 mm. For best fit, the panel preparation should be checked against the equipment drawing before installation.

What are the main dimensions of the unit?

The body dimensions are 45 mm high by 45 mm wide, with a front plate size of 48 mm by 48 mm. The installation depth is 34 mm. The 7KT5500 is compact, making it suitable for space-conscious panel layouts.

Does it include a masking frame or cover?

No. This version is specified without a masking frame or cover, so that detail should be considered when matching it to an existing panel opening or bezel arrangement.

What is the enclosure protection rating?

The unit is rated IP20. This means it is intended for installation within an enclosure or panel environment rather than exposed use.

Is it suitable for AC-powered applications?

This model is specified for DC voltage only. If the application uses AC power, a different counter type would usually be required.

What kind of applications is this product commonly used in?

It is commonly used wherever operating hours need to be tracked on machinery, control panels, switchboards, or other electrical assemblies. Typical uses include runtime indication for motors, pumps, fans, and general industrial equipment.

How heavy is the unit?

The net weight is 58 g, which helps keep panel loading low in compact assemblies.

Is this a good choice for replacing an existing panel hour meter?

It can be a practical replacement option when the existing unit matches the same mounting approach, DC voltage requirement, panel space, and non-resettable hour-counting function. Checking the cutout size, front dimensions, depth, and voltage range is the best way to confirm suitability.