Multi-Channel Design Provides Two (2) Twowire       Transmitters in 1 Package

High Density DIN Rail Mounting

Output Linear to T/C Millivolt Input

Standard Input Ranges for the Most Popular       Applications

Output Loop Powered from 12 to 35VDC

Three Year Warranty

The ActionI/Q model Q520 is a DIN rail mount, thermocouple input, dual (2) channel, two-wire transmitter. Each channel accepts a thermocouple input and provides an isolated, 4-20mA output signal, linear to the millivolt input. Cold junction compensation is provided and each channel is fully isolated (1800VDC) from input to output and channel to channel.

All ActionI/Q modules feature SnapLoc, plug-in, screw terminals for easy installation and low Mean-Time- To-Repair (MTTR). If desired, two or more modules can slide together and interlock for solid, high density mounting. This is accomplished by removing either the foot, or the adjacent unit's face plate, for right-hand side or left-hand side monting, respectively. The module to be attached will easily slide on to the side of the mounted unit.

Application
Thermocouple input, two-wire transmitters are used to convert a specific temperature range into a regulated 4-20mA signal. Two-wire transmitters are primarily used in remote locations near the sensor since they reduce the probability of signal errors and save wiring costs by utilizing the two power wires to send the 4-20mA signal. The current signal is usually monitored by a control system or data recorder.

Typically, thermocouples are used to measure high temperatures such as in an oven or furnace. Thermocouple wires can be run a short distance to a panel, or farther with the use of shielded wire, without errors caused by noise or lead resistance in the wires. These sensor wires are usually terminated at the two-wire transmitter and converted into a 4-20mA signal which is highly immune to noise and not affected by lead resistance, both of which can cause significant errors (1mV @ 25°C) in voltage signals transmitted over long distances.