In the past, operator input to a machine was only rarely possible without permanently wired operator controls. Whether you were dealing with emergency stop, pushbuttons, switches, indicator lights, or key-operated switches: All these controls had to be planned, ordered, installed, wired, labeled and maintained. Their time-consuming and often error-prone individual installation constituted a significant cost item in control cabinet construction. Siemens proves that it can be done more efficiently and cost effectively – with SIMATIC HMI Key Panels.

Save on costs, not on functionality

The SIMATIC HMI Key Panels impress users by offering maximum flexibility in the most restricted space – and at an extremely favorable price. They also offer an abundance of other benefits.

  • Safe data traffic with PROFINET
    With two PROFINET-enabled Ethernet interfaces onboard and integral switch functionality, the KP8 PN can be integrated extremely easily into existing automation networks – without costly cabling or additional hardware.
  • High availability and integral diagnostics
    Faults can be bridged by means of an integral redundancy mechanism. A wire break or component failure, for example, can be offset by the Media Redundancy Protocol (MRP) for networks with a ring topology.
  • Compact and rugged
    Fast, space-saving attachment of the compact devices using clamps or a PRO empty enclosure – in the control cabinet as well as next to the machine.
  • 24 V voltage supply can be looped through
    The SIMATIC HMI Key Panels can be installed next to each other without gaps, and the 24 V voltage supply can be simply looped through from the neighboring panel.
  • Simply everything in view
    The illuminated pushbuttons can be labeled individually and all have dimmable LED backlighting. In addition, process-controlled display of five colors (red, green, blue, white and yellow) is possible.
  • Safety Integrated
    With its integral safety functionality, the KP8F PN guarantees error-free transfer of safety-related signals via PROFIsafe. There are two fail-safe inputs for the connection of a SIL 3 emergency stop pushbutton, for example.
Significantly simpler …
With the SIMATIC HMI Key Panels, many basic functions can be combined to optimize costs, and the configuring and installation overhead can be reduced to a minimum. Compared to conventional installation, the use of a pre-assembled, ready-to-install key panel reduces the wiring overhead to a minimum.

Simplify wiring with Key Panels

… faster …
Cutting out the openings, installing the keys, laying and attaching the cables, and engraving and fitting the labels. All these work steps meant that the installation and wiring of individual long-stroke keys and switches used to be extremely time consuming – and the process
was also highly error-prone. All that is now in the past thanks to the SIMATIC HMI Key Panels. Time savings of up to 80% are now possible.

… and more cost-effective
You also profit from significant savings in material costs. Integration into a key panel pays off, even from just three keys. Keys that are not required initially can be activated later at any time by configuring.

 Cost savings using SIMATIC HMI Key Panels


With the Key Panels SIMATIC HMI KP8/KP8F PN Siemens offers a compact keypad operator panel designed for PROFINET environments at a favourable price. Eight large and ergonomic keys, which can be illuminated in five different colors form a unit. For larger control panels you can add further units without a gap and electrically connected due to integrated Ethernet switches as well as looped through 24 V DC.

For safety-related applications there is a failsafe variant KP8F PN.

Area of application

The rugged Key Panels are designed for simple and straightforward machine operation. They can be used wherever HMI functions cannot be carried out without keys and lamps, e.g. on control consoles for machines and plants .

Up to 60 % time savings for wiring and commissioning
No wiring mistakes since only one standard bus cable is connected
Integrated Ethernet switch for the setup of linear and ring topologies
Ideally suited for installing in the expansion units of the fully enclosed HMI devices
A fail-safe version is available

Design and functions

SIMATIC HMI KP8 PN offers 8 large illuminated pushbuttons which can easily be labeled with labelling strips. The keys feature tactile feedback. Thus they can be reliably operated even when wearing gloves. You can set five colors (blue, green, red, yellow, white) and the brightness of the keys via the STEP 7 hardware configuration. 8 I/O PINs are available on the rear side; these I/O PINs can be used to connect additional control elements.

The KP8F can be addressed by two controllers via the Shared Device PROFINET function.

The Key Panels can be installed next to each other without gaps, due to the integrated Ethernet switch the units can be part of a line topology and even the 24V DC can easily be looped through.

The format of the Key Panels is selected so that they are also ideally suited for installation into the expansion units of the fully enclosed HMI devices.

Key Panel KP8F – the fail-safe version
With the help of the integrated PROFIsafe communication, this Key Panel can be used for fail-safe operation with SIMATIC S7-300F/400F. The two additional fail-safe inputs of the KP8F can be used for failsafe signals, e.g. sensors with floating contacts.
Two emergency stop buttons according to SIL 2 or one according to SIL3 can be connected.

Technical data

Number of keys8
LED colorsred, yellow, green, blue, white
Digital input8 (2 additional failsafe inputs with KP8F)
Digital output8
Interfaces2 x RJ45 for PROFINET with integrated switch
Degree of protectionIP 65 front if mounted, IP 20 rear
Front panel98 x 155 mm (W x H)
Installation cutout68 x 129 mm (W x H)
Depth49 mm
Article NumbersKP 8: > 6AV3688-3AY36-0AX0 KP8F: > 6AV3688-3AF37-0AX0