Rice Lake PR5230 Fieldbus Transmitter - Manual (Page 28)

Options PR 5230 Instrument Manual
EN-28 Sartorius
3.2 Option WE1
3.2.1 Safety Instructions
Caution!
It is essential to observe the safety instruction in Chapter 18.4!
3.2.2 Description
The option WE1 is used for an intrinsically safe interface of load cells or weighing platforms situated in a
hazardous (Ex) area Zone 1 and 21 with PR 5230 installed in a safe area according European directive 94/9/EG
and related harmonized European standards (see also Chapter 18.4).
The unit is designed for weighing applications requiring intrinsically safe interfacing. This is achieved by use of
double provided current and voltage limiters in the supply circuit and voltage limiters in the analogue
elektonic (weighing electronics board) of the PR 5230 with option WE1.
The PR 5230 with option WE1 provides the intrinsically safe interfacing of:
-
1 voltage output for the supply of load cells or weighing platforms situated in Zone 1 or 21,
- 1 measuring voltage input from Zone 1 or 21 and
- 1 sense voltage input from Zone 1 or 21.
3.2.3 Marking
II (2) G [Ex ib] IIC
II (2) D [Ex ib D]
KEMA 10 ATEX 0065 X
See also Chapter 18.4.
3.2.4 Display
After switching on the instrument the following information is short-time displayed:
3.2.5 In Connection with Option Y2
The combination WE1 and Y2 is also possible; see Ex design for Zone 2/22 and Zone 1/21 in Chapter 18.4.