PEPPERL+FUCHS Reliable Limit Monitoring with SC-System’s New Trip Amplifier

The SC-System’s signal conditioner product family from Pepperl+Fuchs includes numerous modules for digital and analog field signals. The modules ensure that process communication is safe and efficient. In addition to transmitter power supplies, isolating amplifiers, passive isolators, and temperature and signal converters, the trip amplifier now joins the ranks of this portfolio of compact analog modules. Use the new trip amplifier to reliably control security-related parameters, recognize and fix faults, and optimize plant safety.

Clear signals, no workaround 

The SC-System trip amplifier monitors measurement signals based on a previously determined limit value. If the actual value deviates from the limit value, the module sends a signal that activates an emergency trip or an alarm, as an example. Due to the module’s parameterizable outputs, switch signals are available at the relay contact outputs without the user having to refer to a central control panel. 

Variety of applications for greater flexibility  

In addition to its parameterizing options, the SC-System’s trip amplifier enables analysis of diverse input variables. The module processes incoming standard signals from 2-wire-transmitters, unipolar and bipolar signals from 2-wire-transmitters, as well as unipolar and bipolar current and voltage sources. The module can be adapted precisely to a specific application, providing users with utmost flexibility. Additionally, a supply of 2-wire-transmitters is available. 

Safe limit value monitoring
With a separate input at the trip amplifier, a start-up override may be activated. This is useful if high pressure is necessary for a manufacturing process, but during the start-up phase its value is below the set point. The integrated start-up override enables increasing pressure without the limit indicator setting off the alarm. In another application example, pressure may be too high during operation, leading to a switch-off of the pump drive. The pressure continuously declines until finally reaching the valid range. A restart inhibit prevents the pump drive from re-starting prior to identifying and correcting the switch-off event. 

SC-System—reliability in its most efficient form 

The SC-System’s 1- and 2-channel signal conditioners are especially designed for use in non-hazardous areas. With a width of 6 mm and a height of 97 mm, the compact modules are ideally suited for retrofitting in tight spaces. The SC-System offers high-quality three-way isolation between input, output, and supply, withstanding a working voltage of up to 300 V and a test voltage of up to 3.0 KV. The signal conditioners are designed for an operating temperature from -25 °C to +70 °C, and can be mounted horizontally or vertically without distance and reducing operating values. The SC-System modules are supplied with 24 volts via terminals or power bus, an insert for 35-mm DIN rails. 

SC-System trip amplifier at a glance: 

  • Reliable limit monitoring (min and max) 
  • Parameterizable switching outputs 
  • Various input quantities can be evaluated 
  • Integrated start-up override and restart inhibit 
  • Compact housing design 
  • High-quality three-way isolation 
  • Convenient installation, power supply and error reporting via power bus 
  • Operating temperature from -25 °C to +70 °C