Summary #

This guide explains how to connect and configure a variable-speed pump using the ProfiLux 1-10V interface. Once the pump is assigned to a channel, flow schedules and wave patterns are configured via Pump Groups.

Applies to #

• ProfiLux 4 Series (incl. Industrial Line / IL)
• ProfiLux 3 Series
• Software:
  • GHL Connect (App, Webinterface, myGHL)
  • GHL Control Center

Before you start #

• Control cable: A compatible control cable is required to connect your pump to the ProfiLux L-port. In most cases this is available from the pump manufacturer. If only a bare-wire or incompatible cable is available, use the S-Port & L-Port Breakout Box to connect it — refer to the Breakout Box manual for wiring details.
• Voltage range: Check your pump’s documentation for the correct control voltage range. Most pumps use 1–10V. Tunze stream pumps typically use a reduced range (e.g. 3–8V) — check the pump manual for the exact values.
• L-port capacity: Each L-port controls two independent 1-10V channels (e.g. L1/L2, L3/L4). To use both channels on a single port, a YL2 Splitter Cable is required. For Tunze pumps, the ProfiLux-Tunze Adapter Cables (ProfiLuxTunze1 / ProfiLuxTunze2) are also needed — see Step 1 for details.

Installation & Setup #

Step 1 — Connect the pump #

• Connect one end of the control cable to your pump’s control port or driver or connect it to the S-Port & L-Port Breakout Box.
• Connect the other end to an available yellow L-port on the ProfiLux, expansion card, or Expansion Box.
  
  

  Yellow L-ports on the ProfiLux 4 — port count and layout vary by model and expansion.
• If using a YL2 Splitter Cable: plug the splitter into the L-port first, then connect the individual pump cables to the splitter outputs.

Tunze pumps — Adapter cable note: Tunze pumps require the GHL Tunze adapter cables (T1 or T2). These cables are not interchangeable — T1 controls odd-numbered channels (L1, L3, L5, …), T2 controls even-numbered channels (L2, L4, L6, …). For a single Tunze pump, only a T1 cable is needed — without a splitter, the port always uses the odd-numbered channel. When connecting two Tunze pumps via a YL2 splitter to a single L-port, use one T1 and one T2 cable.

Step 2 — Assign the interface in software #

Navigate to the 1-10V interface settings:

• In GHL Control Center: Go to System → 1-10V interface and select the channel corresponding to your L-port.
• In GHL Connect: Select 1-10V interfaces from the main menu and tap the relevant channel.

Configure the following settings:

• Function: Set to Pump and assign a pump channel number. This number is used to identify the pump in Pump Groups.
• Output signal — U min. / U max.: Set according to your pump’s specifications. Most pumps: 1–10V. Tunze stream pumps typically use a reduced range (e.g. 3–8V) — check the pump manual for the exact values.

Save the settings. Repeat for each additional pump channel.

Next steps #

Your pump is now assigned to a channel and ready for scheduling. Continue with Pump Groups to configure flow programs, wave patterns, and event reactions:

• Pump Groups – Configuration Guide

Notes #

• Channel numbering across ports: Channel numbers are sequential across all L-ports, including those on expansion cards and the Expansion Box. For example, if the ProfiLux has ports L1/L2 through L5/L6, an expansion card adds L7/L8 and beyond. Ensure channel numbers do not conflict with other assigned pumps.
• Return pumps: Return pumps with a 1-10V interface are set up the same way. For an overview of all return pump control options, see: Return Pump Control – Overview & Use Cases

Downloads #

• S-Port & L-Port Breakout Box manual