The N30U meter is a programmable digital panel meter destined for measurements of signals originating from standard sensors destined for temperature measurements and for the measurement of analog standard signals applied in automation. Additionally, the meter enables the indication of the current time. The readout field is a LED display, which allows the exposition of results in colours: red, green and orange. The measured input signal can be arbitrary converted by means of a 21-point individual characteristic.
Features of the N30U meter:
- display colour individually programmed in three intervals.
- programmable thresholds of displayed overflows.
- 2 NOC relay alarms operating in 6 modes.
- 2 switched relay alarms with a switching contact operating in 6 modes (option).
- signaling of measuring range overflow.
- automatic setting of the decimal point.
- programming of alarm and analog outputs with the reaction on the selected input quantity (main or auxiliary input).
- real-time clock with the function of the clock supply support in case of the meter supply decay.
- programmed averaging time – function of walking window with the averaging time up to 1 hour.
- monitoring of set parameter values.
- locking of introduced parameters by means of a password.
- recount of the measured quantity on the base of the 21-point individual characteristic.
- service of the interface with MODBUS protocol in the RTU mode (option).
- conversion of the measured value into a standard – programmable current or voltage signal (option).
- highlight of any measuring unit acc. to the order.
- signaling of alarm operation – switching the alarm on causes the highlight of the output number.
- galvanic separation between connections: alarm, supply, input, analog output, output of the auxiliary supply, RS-485 interface.
Protection grade from frontal side: IP65.
Meter overall dimensions: 96 x 48 x 93 mm (with terminals).
The meter casing is made of plastic.
Inputs |
|
Input kind
Pt100 | Pt500 | Pt1000
400 Ω
4000 Ω
Thermocouple of J type
Thermocouple of K type
Thermocouple of N type
Thermocouple of E type
Thermocouple of R type
Thermocouple of S type
Current input
Voltage input
Current time
|
Maximal measuring range
-205...855°C (-200...850°C)
0...410 Ω (0...400 Ω)
0...4010 Ω (0...4000 Ω)
-200..1200 °C (-100..1200 °C)
-200..1370 °C (-100..1370 °C)
-200..1300 °C (-100..1300 °C)
-200..1000 °C (-100..1000 °C)
-50..1768 °C (-50..1760 °C)
-50..1768 °C (-50..1760 °C)
24...24 mA (-20...20 mA)
-10...63 mV (0...60 mV)
00.00...23.59
|
Class
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.5 sec./ 24h
|
Output
Relay output
2 x relays, voltageless NO contacts, load-carrying capacity 250 V a.c./ 0.5 A a.c.
2 x relays, voltageless switched contacts, load-carrying capacity 250 V a.c./ 0.5 A a.c.
Analog output
Current programmable 0/4...20 mA, load resistance ≤ 500 Ω
Voltage programmable 0...10 V, load resistance ≥ 500 Ω
Error of output: 0.2% of the set range. Additional error from temperature changes:50% of class/10K.
OC output: OC type, passive npn, 30 V d.c./30 mA.
Auxiliary supply: 24 V d.c./ 30mA (Only for meter version: N30U-1XXXXXXX).
Digital interface
Interface type: RS-485.
Transmission protocol: MODBUS RTU.
Modes: 8N2, 8E1, 8O1, 8N1.
Baud rates: 4.8, 9.6, 19.2, 38.4, 57.6, 115.2 kbit/s.
External Features
Display
5 Digit LED, three-colour display (colour changes depending on displayed value): Red, Green, Orange
Digit height - 14mm.
Indication range: -19999...99999.
Weight: < 0.2 kg.
Overal - dimensions: 96-48-93 mm.
Protection grade: from frontal side: IP65. From rear side: IP10.
Rated Operating Conditions
Supply Voltage: 85...253 VAC (40...400 Hz) or DC | 20...40 VAC (40...400 Hz), 20...60 V DC.
Power input < 6 VA.
Temperature: ambient: - 25...23...55°C | storage: -30...70°C.
Relative humidity: 25...95%. Condensation inadmissible
Operating position: any.
External magnetic field: 0...400 A/m.
