Hydac HLT 1000 Analog, Safety Manual

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P
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no
.:
669879
/ S
ta
tus:
19
.07.
2012 E
6
4.3.2 Safe state
The safe state is characterized by the output signal being permanently or cyclically
outside the range 4 ... 20 mA. The higher-level control system must recognise this
situation and put the machine (EUT) into a safe state.
4.3.3 Dangerous failures
A dangerous situation can arise if the linear position transducer of the higher-level
control signals an error position. The circuit and software design, diagnostic measures
and the choice of components all contribute to minimizing the probability of such
failures (see Point 9).
5 Specification (extract)
The full specification can be found in the user manual for the instrument.
5.1 Diagnostic times
Diagnostic time Value
Diagnostic interval Continuous diagnostics
Process safety time ≤ 1000 ms
5.2 Electrical connection
Supply Value
Supply voltage (V
in
) nominal 9 ... 36 V DC
Residual ripple supply voltage ≤ 250 mV
Power consumption < 2 W
Electrical connection
(cable; 3-core) white: + U
B
green: 4 ... 20 mA signal output
brown: GND
Reverse polarity protection
Surge protection
Short-circuit protection Standard
Standard
Standard
5.3 Environment
5.3.1 Temperature range
Environmental conditions Value
Operating temperature range - 40 ... 85 °C
Storage temperature range - 40 ... 100 °C
5.3.2 Mechanical environment
Environmental conditions Value
Safety class to EN 60529 IP 66 * / 67
Safety class to DIN 40050-9 IP 69 K *
* Modification 100