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DRX400 / X500
Code
Description
k
Cable entry / cable gland
l
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 Definition
of the safety function on page 9).
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 Error conditions on page 19.
Antenna
DRx400-x500-PM - English – SIL2/3 06-29-21 – Issue 2
Current output
(safe)
Safe subsystem
www.drexelbrook.com
Applicable options for SIL devices
—
4
—
0
—
Non-safe
subsystem
Local display
INTRODUCTION
HART
1
6
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