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Technical Data Tower-Sens LB490
Operating data
Power Supply – 250 VAC, 50 – 60 Hz, 15 VA
95
Option:
+ 10%
18 – 32 VDC / 24 VAC – 15% , 15 W
Other inputs and outputs
1 digital input
Hold signal
Storage temperature
-40°C … +55°C (-40°F … +131°F)
Electronics
CPU
– data backup with EEPROM
– self-monitoring through watch-dog timer
– continuous monitoring of the hardware
3 relay contacts SPDT
either for:
– Hold signal
– max. alarm
– min. alarm
– detector temperature
– interference radiation
Max. 5 A at 250 VAC or 30 VDC
Change-over contacts
Signal output (HART, fieldbus or profibus)
HART
Standard:
0/4 – 20 mA, insulated
either active
max. impedance: 120 – 500 Ohm
or passive (12 V…24 V)
max. impedance 12 V: 250 Ohm
max. impedance 24 V: 500 Ohm
HART interface for digital measured value
transfer and parameter setting
Continuously monitored current output
(patent pending)
Option:
Intrinsically safe current output, passive
power supply: 12…30 V, voltage drop < 3.5 V
20 m signal cable (blue), pre-assembled,
Ci 3.36 nF, Li 13.65 H
Profibus PA
Standard:
Interface for profibus PA
0/4 – 20 mA current output, can be used parallel,
e.g. for indication on site
Alternative: Profibus PA can be switched
over to HART communication
Option:
Intrinsically safe profibus PA-connection,
20 m signal cable (blue), pre-assembled
Fieldbus Foundation
Standard:
Option:
Interface for Fieldbus Foundation
0/4 – 20 mA current output, can be used parallel,
e.g. for indication on site
Alternative: Fieldbus Foundation can be
switched over to HART communication
Intrinsically safe Fieldbus Foundation connection,
20 m signal cable (blue), pre-assembled
1 relay contact SPDT
Failure signal
Max. 5 A at 250 VAC or 30 VDC
RS232
for software update
RS485
for cascading up to 8 detectors
Cable connections
Fittings
4 ea. 3/4 inch, NPT
Fitting as option
3 4
Wire cross-section
Max. 1.5 mm2
/ inch NPT to metric M20
Other adapters on request
Rod detectors
Scintillator
Plastic scintillator, 5 cm diameter
With automatic drift compensation
Case material
Stainless steel 1.4301
Temperature stability
± 0.5%
Basic module
Sensitive detector length
1000 mm
2000 mm
Weight
Weight with water cooling
approx. 20 kg
approx. 27 kg
approx. 26 kg
approx. 41 kg
Extension module
Sensitive detector length
2000 mm
Weight
Weight with water cooling
approx. 17 kg
approx. 32 kg
Flame-proof enclosure
Class
ATEX:
FM/CSA:
Operating temperature
II 2G Ex d IIC T6
II 2D Ex tD A21 IP66 T80°C
Class I, Division 1, Group A, B, C, D -40 °C …+50 °C
Class II and III, Division 1,
(-40 °F …+122 °F)
Group E, F, G
NEMA 4X
Optional: Intrinsically safe signal output
-20 °C …+50 °C
ATEX:
II 2(1)G Ex d[ia] IIB/IIC T6
(-4 °F …+122 °F)
II 2(1)D Ex tD A21 [iaD] IP66 T80°C
Option: water cooling
Source and shieldings see separate brochure. Subject to change without prior notice.
BERTHOLD TECHNOLOGIES GmbH & Co. KG · P.O. Box 100163 · D-75312 Bad Wildbad, Germany
Phone +49 7081 177-0 · Fax +49 7081 177-100 · industry@berthold.com · www.Berthold.com
LB 490 Tower-Sens · 06-2009.2000 · Id. 50250PR2 · Rev. 01 · 06-2009
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