WIRELESS 4-20ma current loop cable replacement

Description

Eliminate EXPENSIVE SCADA radios or EXPENSIVE cable trenching between 4-20ma current loop sensors and programmable logic controllers.

Using the BATTLE HARDENED, TRIED AND TESTED, LORA (LOng RAnge) wireless protocol, now you can eliminate cable runs of up to 8 miles (or 15km). Of course the LORA loves line of site, but this is also a low frequency spread spectrum technology that can penetrate walls easily. Of course any obstacle reduces the range. This isn’t silly “toy band” radio, this is a spread spectrum frequency hopping radio system that can handle demanding environments.

Each WIRELESS 4-20mA cable replacement consists of a PAIR of endpoints, one end a 4-20ma transmitter and the other end a 4-20ma receiver. They are interconnected by the LORA wireless technology.

• 4-20mA Wireless Transmitter Unit : Remote or Sensor Unit
  • Connections
    • 5-24V DC input for power ( 140mA per transmission / 30mA in idle )
    • Dry Contact Relay Sense/Read – Use for fault detection – send fault signal to PLC/SCADA wirelessly
    • 4-20 mA Sensor connection – Connect to the sensor normally – samples sensor periodically
  • Paired with a Receiver Unit – – One TX unit + one RX unit replaces one wire.
  • This is the end that connects to a standard 4-20mA sensor
  • On a period basis that is adjustable (standard is 1 min) the transmitter checks the sensor and then transmits the 4-20mA current level
  • Many of these remote transmitters are powered by small solar installations (you can find easily on Amazon, etc.)
    • Recommended Solar Panel : 10-20W
    • Recommended Energy Storage: 50W-100W Hour LifePo4 Battery – Probably overkill, but you want to be sure
    • Recommended Charge Controller: Charge Controller : Size to the panel. Max load current never more than 0.2Amp (this is conservative)
  • Compatible with:
    • Any 4-20 mA sensor
    • WIKA USA Industrial Pressure Sensors
• 4-20mA Wireless Receiver Unit
  • Connections:
    • 5-24V DC input ( 140mA per transmission / 30mA in idle )
    • 4-20 mA Output – A perfect “reflection” of the remote 4-20 mA sensor value
    • Fault Relay Output –
      • reflects relay status of remote dry contacts
      • True relay output – not “just digital”
      • also triggers if transmissions are not detected
  • Paired with a Transmitter Unit – One TX unit + one RX unit replaces one wire.
  • This is the end that connects to a standard 4-20mA receiver such as a 4-20ma to RS485 converter or a PLC
  • On a period basis determined by the Transmitter Unit, this receiver receives the 4-20mA current level digitally and then provides a 4-20ma signal that is an exact mirror of what the Transmitter Unit detected. Very cool
  • Generally, the wireless 4-20mA cable receiver will have power on its end as it is close to many devices which utilize the 4-20mA inputs for a control system.
• Both Units
  • See the 4-20 wireless quick start guide to understand in more detail.
  • 1000’s of units can be operating simultaneously in an area without interference.
  • ISM Frequency Bands 915MHz (USA)
  • FCC Certified (USA) & IC (Canada) requirements
  • CE marked
  • RoHS compliant
  • DIN Rail Mounts
  • Professionally Molded Case with custom fit electronics
  • This product is built for scale production
• Use Cases
  • Oilfield Monitoring
    • Wells are located a distance from the datamonitoring point
      • Wellhead pressure, pipe pressure, remote temperature
      • Integrate within SCADA systems
    • MINIMIZE DOWNTIME DUE TO BROKEN WIRES
      • Keep 5-10 of these units in stock at each “plant” for reduced downtime
      • Replace the broken wires with this product.
      • Eliminate pulling replacement wire.
      • Eliminate finding the break
    • REDUCE THE COST OF NEW PLANTS
      • No trenching for 4-20 sensors
      • No separate wire runs in trenches with oil or water pipes
      • Eliminate the wire run planning, conduit-ing, and difficulties of running wire.
      • Rapid reconfiguration.
  • Wastewater Treatment Facilities
    • Concrete Containments make digging and re-work impossible.
    • NO wires, means NO conductive wires/surfaces to create dangerous situation or short circuits
• LORA Wireless Key Bullets
  • LoRa allows for MANY WIRES in an installation because these “virtual wires” won’t interfere with one another due to LoRA radio magic of chirped spread spectrum.
  • AES 128 bit encryption
  • Absolutely NO SIM CARDS required.
  • Security uses several magic numbers
  • Uses ISM bands and requires no special licenses
  • Transmission power are carefully maintained within FCC power envelope
  • As of June 2024, over 350 million LoRa Radio integrated circuits have been deployed worldwide

LEAD TIME: Approximately 4 Weeks if not in stock