DETAILED DESCRIPTION

STR551
The indicator STR551 stands out in its market segment for the bright OLED display and the innovative multilingual interface as well for RFID/NFC connectivity. The analogue input can be configured by parameter for a wide range of temperature sensors and process signals in mA and Volts. The monochromatic OLED  graphic display supports graphs showing process trend with programmable sampling times and bar graphs with alarm thresholds typically used for level, flow and dosage visualization.
The linearization of input can be customized up to 16 points as required on tanks with irregular profile. Mathematical functions linked to process value are also available, such as Totalizer and Sum. Connectivity is guaranteed by RS485 with Modbus RTU/Slave protocol.
For maximum flexibility of use, it is also possible to choose between horizontal or vertical installation of the same device.
Distinctive feature of the entire STR series is the innovative multilingual interface, with text menus allowing intuitive and quick navigation of parameters and display pages. It is possible to choose among five languages and the comprehensive menu considerably reduces the need to consult technical manual for initial set-up.
An additional programming tool is the dedicated App MyPixsys relying on RFID/NFC connectivity and allowing straight forward programming without wirings by Android devices.

Specifications

• Dimensions: 96x48 (Front panel) x 48 mm (1/8Din)
• Power supply: 24...230VAC/DC ±10% 50/60 Hz (galvanic isolation 2500V)
• Consumption: 6 VA
• Display: OLed (monochromatic yellow)
• Operating conditions: Temperature 0-45 °C, humidity 35..95 RH% (non condensing)
• Sealing protection: Front panel: IP54 (IP65 with gasket) - Box and Terminal blocks:IP20
• Quick set-up options: Software LABSOFTVIEW and/or Memorycard
• Wiring: extractable terminal blocks, spring lock
• Analog input: 1 x 16 bit, Selectable for TC type K, S, R, J, T, E, N, B (automatic compensation of the cold junction 0..50 °C, ± 0,2% F.S. ± 1 Digit F.S.), thermoresistances PT100, PT500, PT1000, Ni100, PTC1K, NTC10K (β 3435K), process signals 0-10 V(54000 points), 0/4-20mA(40000 points), 0-60 mV (16000 points), Potentiometer 6 KΩ, 150 KΩ (50000 points) Customizable linear input (max 16 steps)
• Digital inputs: 2 x PNP programmable for Run / Hold / Tare-Zero / Alarms reset/ Peaks reset/ Totalizer reset / Activate-Reset Sum / Parameters-Setpoint Lock
• Sampling time: 4,1 ms (Frequency from 4,12 Hz to 242 Hz)
• Relay output: 2 Relays2A - 250VAC (resistive charge)
• Analog output: 2 Analogue (1 x 0-10V and 1 x 0/4-20mA)
• Auxiliary output: 24 VDC - 30mA for external sensors supply (loop-powered)
• Serial communication: RS485 Modbus RTU - Slave (1200...115200 Baud) galvanically isolated from Power supply/Inputs/Outputs
• Alarms regulation: ON - OFF with hysteresis
• Alarm mode: Absolute / Threshold, Band with instantaneous/delayed/retentive/by digital input activation, Sensor failure / Activation by serial line
• Sum Function: Sum different process measurements over time by digital input or by keyboard
• Totalizer Function: Visualisation of instant process value and total value since last reset
• Trend visualization: Trend visualisation with selectable time basis 1 to 3600s
• Analogue retransmission: Process values / Setpoints
• Digital transmission via RS485: Process values / Setpoint / Parameters
• Latch-on function: Semi-automatic setting of limits/ calibration values for analogue input
• Text menus: English/Italian/German/French/Spanish
• Measure unit visualization: Selection of different measuring units

Ordering codes

• STR551-12ABC-T128R1: analogue input + 2 relays 2A + 1 Out 0..10V + 1 Out 0/4..20mA + RS485 Modbus RTU /Slave