Parker Hannifin has expanded its DFplus proportional valve range with a new IO-Link Class B interface, extending the communication options available for hydraulic applications that require high dynamic performance, diagnostics, and simpler installation.
The launch builds on the current fourth-generation DFplus platform, which already offers IO-Link Class A as a standard communication port alongside an analogue interface. In that configuration, users can adjust valve parameters and read status data during operation, while galvanic isolation between the operating voltage supply and the IO-Link voltage supply allows access to electronics parameters even when the operating voltage is switched off.
The new IO-Link Class B version adds a separate, galvanically isolated power supply for the power stage, allowing Parker to replace more complex 6+PE or 11+PE connections with a standardised, pre-assembled M12 cable arrangement. In the DFplus Class B configuration, both the data connection and the power supply are handled through a single 5-pin M12 connector.
That arrangement allows the valve to operate with currents of up to 4A, maintaining the dynamic performance associated with the DFplus family while reducing wiring complexity. Supply voltage, digital setpoint transmission, digital feedback, and enable and disable functions are all handled through the same interface, provided suitable IO-Link masters and M12 cables are used.
Frank Henschke, Product Manager at Hydraulic Valve Systems Division Europe, Parker Hannifin, said: “By switching to a pre-assembled M12 connection, the risk of malfunctions is significantly reduced, as these are often caused by connector terminations in the plug-in connections.”
Alongside installation changes, Parker is positioning the valves as a route to improved serviceability and condition monitoring. The IO-Link Class B version gives users access to diagnostics including temperature, cycle counts, and error states, while supporting parameterisation from the PLC or via service tools. That provides a basis for faster commissioning and maintenance strategies built around equipment condition rather than fixed intervals.
Parker also said the DFplus valves with IO-Link Class B can be used as shut-off elements up to Category 3, PL d in accordance with EN 13849-1. With suitable IO-Link masters, the galvanic isolation between the power section and the control electronics also supports Safety over IO-Link applications.
The valves are available now in selected sizes and configurations, with further variants due to follow. For machine builders and hydraulic system integrators, the update points to a familiar direction of travel — more standardised connectivity, fewer wiring constraints, and more usable diagnostic data at the valve level.
