Description
The electrode relays are used for conductive level detection. levels. The possible applications extend areas where conductive, liquid media are to be detected, controlled to be detected, controlled or regulated. Hereby level detection (overflow / dry run) as well as minimum / maximum as well as minimum / maximum controls can be realised.
Technical Data
Protection class EN60529
- clamp
- IP20
- Housing
- IP40
Technical Data
- Operating temperature
- -20...+60 °C
- Storage temperature
- -30...+80 °C
- Output contacts
- potentialfrei
- Switching voltage
- min. 5 V, max. 250 V AC / 150 V DC
- Switching current
- min. 5 mA, max. 5 A AC / 5 A DC
- Switching capacity
- min. 300 mW, max.100 VA / max. 50 W
- CE marking
- siehe Konformitätserklärung
- Ex-protection/IECEx
- siehe Baumusterprüfbescheinigung
- Weight
- ca. 170 g
XR-4x2 configuration
Your Configuration
- Basename
- XR-4
- Kanalanzahl
- WHG
- Gehäuse
- Ausgang
- Schaltverzögerung
- Empfindlichkeitsbereich
- Versorgungsspannung
- Busanschluss
- SIL
- ATEX
Further product information
Electrode relay
The electrode relay supplies a measuring voltage which is applied to the earth electrode and the other electrodes. When the earth electrode and another liquid are immersed, a low AC measuring current flows, which signals "medium present / not present"
This alternating current is detected and evaluated by the electrode relay. The response sensitivity of the electrode relays can be optimally adjusted for different media. Even boundary layer detection between media of different conductivities is possible. Electrolytic decomposition of the medium and dangerous contact voltages are reliably avoided.
In hazardous areas, the electrode relays serve as an interface (galvanic isolation) between the Ex and non-Ex areas. The intrinsically safe circuit is safely galvanically isolated from the non-intrinsically safe circuit up to a peak voltage value of 375 V. The electrode relays themselves (without additional protective measures) must not be operated in Ex areas. When installed in an Ex-approved enclosure, operation in the Ex-area is possible. The safe isolation has been tested and certified by TÜV.
Electrode relays can also be used as contact protection relays in applications where signal transmitters with a low permissible contact load (e.g. < 10 mA) are to switch larger loads.
- Working quiescent current switchable
- Safe galvanic isolation between input, mains and contacts
- Adjustable sensitivity ranges
- Various supply voltages
- Various switching delays (also adjustable)
- Acknowledgement button optional
- 1- and 2-channel relay, 2-channel relay detects 2 limit values or 2 MinMax or 1 MinMax and 1 limit value
- 19" card version
- TÜV ATEX approved (ER-142... and ER-143...)
- ER-214 is based on microprocessor technology
System structure
The conductive level detection consists of
rod, suspended or adjustable electrodes and the electrode relays.
