Nivobob
®
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NB 3000
gi130109
8
Continuous level measuring system
NB 3000
Technical information / Instruction manual
page G
Technical data
Electrical data
Power supply
AC version 98 .. 253V 50-60Hz
DC version 20 .. 28V
(voltages incl. 10% of EN 61010)
Installed load
AC version:
150 VA (including internal heater (80W))
DC version:
One unit:
150W (with or without internal heater) *
Further units which are connected to the same power supply:
25W per unit (without internal heater, motor off) **
50W per unit (without internal heater, motor running)
80W per unit (with internal heater, supply voltage 20V DC)
100W per unit (with internal heater, supply voltage 24V DC)
120W per unit (with internal heater, supply voltage 28V DC)
*Considers the max. motor traction which is needed in a failure condition. A failure condition is assumed for
max. one unit at the same time.
** This value can be considered, if the controlling PLC starts the measurement for max. one unit at the same
time.
Signal output:
0/4-20mA
Max. 500 Ohms (active, isolated) Lin/- 0,1mA
Signal output:
Relay
4x Relay SPST:
max. 250V AC, 2A, 500VA non inductive
Signal output:
Electronic counting pulse
Optocoupler
max. 30V DC, max. 25mA
Communication:
Modbus RTU
Physical layer: RS 485 and Ground, isolated
Mode: RTU, Type: Slave
Device number range: 1 - 247 (selectable in menu), Baudrate: 1200 to 57600 Baud, Data bits: 8, Stop Bits: 1
Parity: None
Multi-drop configuration possible. Factory setting of adress is 100. Each unit which is connected to the
network must be set to an individual adress.
Supported commands
Reading: All diagnostics and parameters using command 03
HEX
: Read Holding Register
Writing: All parameters using command 06
HEX
: Write Single Register (not supported is command 10
HEX
: Write
Multiple Register).
Communication:
Profibus DP
Physical layer: RS 485, isolated
Type: Slave
Device number range: 0 - 126 (selectable in menue), Baudrate: 9.6 kbps to 12 Mbps
Available communication by GSD file, Read only (Sensor weight bottom to material (in mm))
Accuracy of measurement
Output
Setting
Accuracy
Counting pulse
10cm (1/6ft) / pulse
1 pulse
5cm (1/3 ft) / pulse
1 pulse
2,5cm (1/10ft) / pulse
2 pulses
1cm (1/20ft) / pulse
4 pulses
0/4-20mA
1% of max. range
Modbus RTU / Profibus
0.5% of max. range
Display
LCD display: 2 line x 16 digit
Indication light
Status by build in LED: Power On, Relais, Maintenance and Failure
