BERTHOLD TECHNOLOGIES LB 480 - Page 165

SENSseries LB 480 Level measurement
BERTHOLD TECHNOLOGIES GmbH & Co. KG
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Volume 2 1 System Description
2
Digital output (not Ex) Open Collector; max. 100mA at 5 to 35V
DC
; R
max
10kOhm; max.
2V voltage drop; at inductive load a freewheeling diode is required
The output can be used either for:
– Error signal
–Stop signal
– Max. alarm
– Min. alarm
– Detector temperature
– Interfering radiation
For intrinsically safe signal output see Volume 1, chapter 5, "Explo-
sion Protection".
RS-485 For software updates and the cascading of up to 16 slaves. For a
software update, all slaves must be logged off from the master first.
Detector temperature sensor Two independent temperature sensors
Measurement deviation:
-25° C to 100° C: ±2K
-55° C to 125° C ±3K
Connection to PCS Via current interface 4–20mA with optional HART
®
protocol
according to Standard BELL-202 FSK.
Pt100 – measurable temperature range -30° C ... 180° C
– monitored temp limits
– Accuracy: +/-0.2° C
– maximum connectable cable length: 30m