Code: SRP-77
  • process meter with 2 displays
  • inputs: 0/4-20 mA, 0/1-5V, 0/2-10V
  • 0, 1 or 2 relay (or OC) outputs
  • power supply output: 24V DC
  • RS-485 / Modbus RTU
  • programmable measuring range, indication filtration, hystereses and delays of control outputs
  • free configuration software S-Config

The SRP-77 meter is designed for measuring of typical current or voltage signals. The main advantages 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 processes ON/OFF type. Current input has protection safeguarding of the measuring resistor against damage. The device is dedicated to aplications, where there is necessity of continuous control of the threshold values. 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.

Number of inputs
Input type
current (mA)
voltage (V)
Input range
0/4...20 mA
0/1...5V, 0/2...10V
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
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
Protection class
IP 65 (front)
IP 20 (case and connection clips)
optional integrated frame for panel cut-out sealing
Case material
Case dimensions
72 x 72 x 100 mm
Data sheet
Manual EN
Declaration of conformity