Use the Analogue Wireless Point to Point WP2P system to send the water pressure signal from the end of a centre pivot to the pump’s VSD controller.
Connect a 4-20mA sensor at one end, the analogue WP2P system then transmits the 4-20mA signal to the other end over a low power digital radio link.
For some applications, you also need to know the water pressure, the level of a remote reservoir or the speed of a VSD pump – all this can be provided with the Analogue WP2P system.
Each Analogue WP2P module provides one analogue (0-20mA) input, one analogue (0-20mA) output together with 2 switch inputs and 2 relay outputs.
The WP2P analogue interface supports the industry standard 4-20mA signal which is used by many pressure, level and temperature sensors and industrial equipment such as Variable Speed Drive (VSD) and PLC controllers.
Using 900MHz digital modulation technology, the Analogue WP2P modules transmit these 4-20mA signals up to 4km when using appropriate high gain antennas. There is also a link status LED that confirms the comms link is OK and radio repeater modules are also available.
The analogue output signal can be used to show flow, level, pressure or even be integrated into a PLC control system.
We also have suitable DC power supplies for the WP2P systems. Choose from plug packs, power packs, solar or even a 110V AC input option which is ideal for centre pivot power supplies. If the control panel has an existing 12V DC supply, then a DC power cable with a 2.1mm jack can be used.
Installing the analogue WP2P on the end of the pivot, you will need to use an omni-directional antenna (whip) and ensure that it is mounted high enough that the pivot structure does not come between the WP2P antenna at the pump station. Also check there is no vegetation etc that would interfere with the communications as the pivot moves through its entire rotation.
Check out our YouTube channel for short videos on choosing power supplies and antennas.
Sending a 4-20mA water pressure from pivot to pump can be achieved with our analogue WP2P.
The products used for this project are:
Qty 1x WP2P Analogue system – Part Number PD8812-WP2P-A (includes two WP2P modules)
Qty 2x 900MHz Whip antennas – Part Number PD9241
Qty 1x Power supply – Plug Pack – Part Number PD5412 (for the pump shed)
Qty 1x Power supply – 110V AC Power Pack – Part Number PD5413 (for the pivot)
Our other wireless solutions, such as our popular Digital WP2P, supports digital inputs and relay outputs which provide an on/off capability when 4-20mA signals are not required.