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SRT-77

Code: SRT-77
  • process meter with 2 displays
  • inputs: thermoresistance or thermocouple
  • 0, 1 or 2 relay (or OC) outputs
  • power supply output: 24V DC
  • RS-485 / Modbus RTU
  • automatic recognition of 3 and 4-conductor connection (RTD inputs)
  • automatic compensation of TC cold ends temperature
  • free configuration software S-Config
Description

The SRT-77 temperature meter has one input: thermoresistance (Pt100/500/1000) or thermocouple (K, S, J, T, N, R, B, E). Measurement is linearised by the polynomial characteristics. The device with thermocouple input has additional measurement range (-10...90 mV) mainly for diagnostics of measurement circuits. The main advantage of regulator are two rows of display. The first one presents measuring value, second one - programmed values: max and min. 1 or 2 relay (or OC) outputs make it possible to control heating / cooling processes. The RS-485 enables data transmission in production process monitoring systems. The REL / OC control outputs can adjust the level of measured signal and are controlled according to one or two threshold values. The meter can be configured with the local keyboard or free S-Config software via the RS-485 communication port.

Specification
Number of inputs
1
Input type
RTD
TC
voltage (mV)
Input range
Pt100, Pt500, Pt1000: -100...+600°C
TC K: -200...+1370°C, S: -50...+1768°C, J: -210...+1200°C, T: -200...+400°C, N: -200...+1300°C, R: -50...+1768°C, B: +250...+1820°C, E: -200...+1000°C
-10...90mV
Output type
Open Collector: I=30 mA, U=30V DC, P=100 mW
relay I=1A, U=30V DC/250V AC (cosø=1)
Power supply
16...35V AC, 19...50V DC
85..260V AC/DC
Display
LED, double: 4 x 13 mm (red) + 4 x 10 mm (green)
Communication Interface
RS-485 / Modbus RTU
Transmission parameters
1200...115200 bit/s, 8N1 / 8N2
Operating temperature
0...+50°C
-20…+50°C
Protection class
IP 65 (front)
IP 20 (case and connection clips)
optional integrated frame for panel cut-out sealing
Case material
NORYL-GFN2S E1
Mounting
panel
Case dimensions
72 x 72 x 100 mm
Files
Data sheet
Manual for version with RTD input
Manual for version with TC input
Declaration of conformity