SICK EuroFID, Operating Instructions Manual

Page: 62 / 214

62 EuroFID · Operating Instructions · 8011094 V2.3 · © SICK AG
Installation of the Operating Unit
6.3.3
Analog outputs
Functional principle
●
The analog outputs supply a load-independent current signal.
●
The electronic measuring range is 0 … 20 mA or 4 … 20 mA (setting → P. 123, §11.11.6 ).
●
The electronic measuring range corresponds to the current measuring range or a
permanently set range (setting
→ P. 123, §11.11.6 ).
Malfunction display
If the current measured values are not valid, the following measurement signal is output:
Analog output “Measured value”
The current signal of the “Measured value” analog output corresponds to the current
measured value in the currently selected measuring range.
●
The current measuring range can be signaled by the “Reference value” analog output.
●
Sliding averaging can be activated ( → P. 120, §11.11.3 ).
●
The function is variable during calibration ( → P. 123, §11.11.6 ).
Analog output “Reference value”
The function of the “Reference value” analog output depends on the set measuring range
mode (
→ P. 115, §11.9 ):
CAUTION: Possible danger for connected devices/stations
When the operating unit is switched on, the analog outputs emit a current of
22 mA for a short time (= 110 % of the measuring range).

Before switching the operating unit off: If necessary for safety reasons,
inform connected stations and/or deactivate connected devices (e.g. alarm
indicator).
Electronic measuring range
Measurement signal in the event of invalid
measured values
1
1
Status output “Measured value valid” → P. 64, §6.3.5
0 … 20 mA 0 mA
4 … 20 mA 2 mA
Output signal of the “Reference value” analog output
Range select mode = “autoAOu” Other measuring range modes
Signal for marking of the measuring
range (
→ Table 3 )
– In measuring mode: Measurement signal
same as the “Measured value” analog output 1
– During calibration: The last measured value
which was measured before start of calibration
1 Activation of sliding averaging → P. 121, §11.11.4
Table 3 Measuring range signal on the “Reference value” analog output
Significance Output signal in mA
Electron. measuring range=
0 … 20 mA
Electron. measuring range=
4 … 20 mA
Measuring range 1 2 5.6
Measuring range 2 4 7.2
Measuring range 3 6 8.8
Measuring range 4 8 10.4
Measuring range 5 10 12.0
Measuring range 6 12 13.6
Measured value is invalid
<1 <4.8
> 13 > 14.4