RTA421
Limit switch

Limit switch RTA421 ©Endress+Hauser

Contactor with loop power supply for monitoring current or voltage signals

The RTA421 contactor monitors industrial processes for safe operation. The unit analyzes current (0/4...20 mA) and voltage signals (0/2...10 V) and switches two independent output relays if the values either exceed or undercut the preset alarm set points. On the display both limit values are indicated in parallel. The bar graph informs on the connected signal at any time. Applications include pump control in the waste water industry. Level measurement in silos can be economically achieved.

  • Fördelar

    • 2 relays for set point monitoring (with SPDT contacts)

    • Loop power supply for connected sensors

    • LC display for alarm set points and bar graph

    • Compact housing

    • Front end setup using 3 push buttons

    • DIN rail mounting, 45 mm housing width

  • Applikationsområde

    • Plant and machine construction

    • Panel builders

    • Process monitoring

    • Process control

Funktioner och specifikationer

Tillbaka

Details

  • Mätprincip

    Process transmitter

  • Measuring principle

    Contacter

  • Function

    Display

    Power

    Switch

  • Loop power supply

    196...250 V AC

    97...127 V AC

    20...250 V AC/DC

  • Power Supply

    Not defined

  • Input

    1 x analog (U, I)

  • Output

    1 x transmitter power supply

  • Software functions

    Not defined

  • Certificates

    -

  • SIL

    Not defined

  • Display

    LCD 6 mm (0.24")

    4-digit

    Bargraph

  • Interface

    Not defined

  • Dimensions (WxHxD)

    45 x 107.8 x 112 mm (1.77" x 4.24" x 4.41")

  • Mätprincip

    Contacter

  • Function

    Display

    Power

    Switch

  • Certification

    -

  • Input

    1 x analog (U, I)

  • Output

    1 x transmitter power supply

  • Relay output

    2 x changeover contacts

  • Auxiliary power supply / Loop power supply

    196...250 V AC

    97...127 V AC

    20...250 V AC/DC

  • Dimensions (wxhxd)

    45 x 107.8 x 112 mm

    (1.77" x 4.24" x 4.41")

  • Operation

    3 keys

  • Display

    LCD 6 mm (0.24")

    4-digit

    Bargraph

Dokumentation / manualer / programvara

Tillbehör / reservdelar

Nr
Order code
Specification
  • 3
    • Nr 3 Order code 51000777

      Terminal strip relay 2 3 pole

      RMA 421/RMA 422/RTA 421

  • 4
    • Nr 4 Order code 51000778

      Terminal strip relay 1 3 pole

      RMA 421/RMA 422/RTA 421

  • 1
  • 2
    • Order code 71402350

      Set, 10x fixing lever housing

      for RMA42x/RMx621/RTA421/RN221N/TMT12x

  • 5
    • Nr 5 Order code RTA421X-HB

      Housing cpl. (version with display) without terminal strip and display PCB

  • Föregångare