Principle
An isolator consists of a power supply, which supplies the pressure transmitter through a galvanic separator to ensure that neither current nor voltage exceeds the specified values.
Product Series:
- 202993 Isolator for hydrostatic Level transmitter
- 202995 Zener barrier for hydrostatic Level transmitter
202995 Zener barrier
The Zener barrier is a passive unit requiring a safe grounding connection based on the ATEX regulations.
The Zener barrier contains of a number of Zener diodes for voltage protection.
A safety fuse will blow if the current exceeds the limits.
- Nominal data 28 V, 300 ?
- Intrinsically safe characteristics for [EEx ia] IIC
UZ = 28 V, Rmin = 301 ?, IK = 93 mA, Pmax = 0,65 W, Cmax = 0,083 ?F, - Lmax = 3,05 mH, L/R Ratio: 56
- Fuse rating 50 mA
- Temperature, ambient -20 °C to 60 °C
- Enclosure IP20
- EC-Type Examination Certificate BAS 01 ATEX 7005
- UL Certificate No E106378 UL
202993 Isolator
The isolator is an integrated unit including active components with low power consumption.
A power supply provides power to the pressure transmitter through a galvanic separator such that neither current nor voltage exceeds the specified values.
A ground connection is not required.
Loop-powered
Lead breakage monitoring
Single channel
HART compatible
For zone 1 applications
- Supply 5-35 V DC, loop powered, lead breakage monitoring
- Output signal Single channel 4 - 20 mA
- Temperature, ambient -20 °C to 60 °C
- Enclosure IP20
- Approvals CE-Conformity, Directive 89/336/EC EN 50081-2, EN 50082-2
- EC-Type Examination Certificate BAS 98 ATEX 7343
- UL Certificate No E106378 UL
- Group, category, type of protection Ex II (1) G D [EEx ia] IIC (-20 °C ? Tamb ? 60 °C) (for zone 1 and 2)