24VDC Excitation Source for Two-Wire       Transmitter Inputs

Protects Equipment and Prevents Ground Loops       with 2000VAC Isolation

High Density DIN Rail Mounting

SnapLoc, Plug-In Terminals for Low MTTR

Universal DC Power 10.8 to 26.4VDC

Three Year Warranty

The ActionI/Q model Q404-3 is a DIN rail mount, signal conditioner, with 2000VAC isolation between input, output and power. The input provides an isolated 24VDC excitation source to power a two-wire 4-20mA transmitter loop.

Factory configured output ranges support standard industrial control signals, such as 4-20mA and 0-10V. Front accessed zero and span potentiometers allow adjustment of offset and gain to compensate for sensor errors or signal losses.

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 DIN rail foot or the adjacent unit’s face plate, for right side or left side mounting, respectively. The module to be attached will easily slide onto the side of the mounted unit.

Application
Two-wire transmitter input conditioners are used to isolate and convert DC current signals into proportional, standard industrial control signals such as 4-20mA or 0-10V. Typically an industrial control system such as a DCS or PLC requires standard industrial control signals with full isolation to ensure reliable, strong signals.

In most industrial process control or data acquisition applications, several different input sources, including currents from various field instruments (e.g. level, flow, pressure and position sensors) are common. Four-wire transmitters accept these field inputs, often through intrinsic safety barriers, and provide the controller (DCS & PLC) the standard industrial signals they require.

The 2000VAC isolation capability of the Q404- 3 prevents ground loops from causing errors in DC current signals and may reduce susceptibility to Electro Magnetic Interference (EMI) and Radio Frequency Interference (RFI). Isolation also provides protection from high voltages and current spikes which may damage expensive Supervisory Control And Data Acquisition (SCADA) equipment.