Continuous level measuring system
NB 4000
Technical information / Instruction manual
page G
Technical data
Electrical data
Power supply
AC version 230V or 115V 50-60Hz +10% / -15% (incl. 10% of EN 61010)
DC version 20 .. 28V
(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: 4-20mA
Max. 500 Ohms (active, isolated) Lin/- 0.1mA
Signal output: Relais
Optional: 1x Relais SPST and 1x Relais DPDT max. 250V AC, 2A, 500VA non inductive
Accuracy of measurement
Output
Measuring range
Accuracy Rope
version
Accuracy Tape version
Counting pulse
< 10m (33ft)
2 pulses
1 pulse
< 20m (66ft)
3 pulses
2 pulses
< 30m (100ft)
5 pulses
3 pulses
4-20mA
< 30m (100ft)
1,5% of measured
length
1% of measured length
Display
LCD
Indication light
Status by built in LED: Power On, Relay, Failure
Memory
Non-volatile (no backup battery required) > 10 years data retention
Connection terminals
0.14 .. 2.5mm
2
(AWG 26 .. 14)
Cable entry
According to selection:
Screwed cable gland: 1x M20x1.5 and 1x M25x1.5 Blindplug: 1x M20x1.5 or
Conduit ANSI B1.20.1: 1x NPT 3/4"+ 1x NPT 1/2" Blindplug: 1x NPT 1/2"
Isolation
Power supply to all other outputs / inputs:
AC version 2210 Vrms
DC version: 1000 VDC
Relay to relay: 2210 Vrms
Protection class
I
Mechanical data
Ingress protection
IP 66, Type 4
Process connection
Threads:
R 1 1/2" DIN 2999 tapered,
NPT 1 1/2" ANSI B1.20.1 tapered
(Adapter for NPT 3" available)
Flanges:
DN100 PN16 EN1092-1 (unit fits to this flange)
2" or 3" or 4" 150lbs ANSI B16.5 (unit fits to this flange)
Aiming flange:
To be mounted directly on a flat silo roof
Nivobob
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NB 4000
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