Signal Calculator

PRetrans 5115 is a signal calculator featuring the four arithmetical operations: addition, subtraction, multiplication, and division. It is possible to perform redundancy measurements with two input signals or to duplicate the input signal. The signal calculator has programmable input for RTD, TC, mV, Ohm, mA, and V. At the same time it features programmable response time as well as programmable current/voltage output.

The 5115 comes with 5-port 3.75 kVAC galvanic isolation. There is mutual galvanic separation of inputs, outputs and supply. The supply voltage is universal AC or DC.

The product is available in both a standard and an Ex version and the Ex version 5115B is ATEX-approved so as to meet future requirements. It is a two-input module and, as the modules can be mounted without any distance between neighbouring units, up to 42 modules can be mounted per metre DIN rail.

The calculator can be used for redundancy measurements of temperature by means of two sensors, where the secondary sensor takes over the measurement when a sensor error occurs on the primary sensor. It is also possible to duplicate the input signal from eg, a temperature sensor or an analogue process signal to two separate analogue outputs.

A green front LED flashes during normal operation. On a sensor or functional error the LED lights constantly. For safety reasons there is continuous checking of vital stored data.