Device Description - KROHNE OPTIWAVE 400 Series Supplementary Instructions Manual

INTRODUCTION
1
Code Description
j Output Output Output Output
k Cable entry / cable gland
l Display Display
Display Display
m Display - documentation language
n Enhanced functions
opqrstuvw All other device descriptors
Table 1-3: Applicable options for SIL devices

1.4 Device description

A device that operates in SIL mode is a functionally-safe level transmitter. It can be used in
safety-critical systems where the safety function is necessary (for more data, refer to
of the safety function
Measurement data is supplied as a current output signal. This output can be used as a safe
output. When the device detects an internal device error or a measurement error, it supplies a
failure current.
The conditions that follow are applicable for measurement in SIL mode:
• The current output can supply a failure current. The current output is the only safe output.
• The local display screen and the HART® interface are not related to the safety function.
• The local display screen and the HART® interface are read-only in SIL mode.
• You can only change parameters in non-SIL mode.
For more data about the failure current, refer to
Antenna
6
on page 9).
Current output
(safe)
↑
→
Safe subsystem
www.krohne.com
Applicable options for SIL devices
1
—
4
—
0
—
Error conditions
→
Non-safe
subsystem
↓
Local display
10/2020 - 4008265401 - AD SIL OPTIWAVE x4-x500 R01a en
OPTIWAVE X400 / X500
Definition
on page 19.
→
HART