Neousys IGT-34C TI Sitara AM3352 IoT Gateway with 4x 4-20 mA Analog Inputs and PoE PD

The 4 to 20 mA current loop is still the standard signal for flow, level, pressure and temperature transmitters across process plants, water sites and building services. The Neousys IGT-34C reads four of them directly, with 16-bit current inputs that take 4 to 20 mA or 0 to 20 mA, in an IoT gateway that mounts on a DIN rail. It is the current input version of the IGT-30 series.

The IGT-34C reads at ±0.1% of full scale at 25 °C and ±0.3% at 0 °C and 60 °C, and every channel is sampled at 100 Hz. A Texas Instruments Sitara AM3352, a single Arm Cortex-A8 core at 1 GHz, with 1 GB of DDR3L memory and Debian 9 pre-installed handles scaling, alarms and forwarding, and the measure range and data format are set in software, with a Neousys shared library for user programs.

Alongside the current inputs are two digital inputs, six digital outputs, a software-configurable RS-232/422/485 port and a separate RS-485 port, with a USB 2.0 port and an RS-232 console port. Two 10/100 LAN ports give separate machine and plant networks, and one of them accepts IEEE 802.3at PoE+, so the IGT-34C can run from a single cable or from 12 to 25 V DC. A full-size mini PCIe socket with an internal SIM slot takes a 3G, 4G or Wi-Fi module for remote sites.

The IoT gateway runs from -25 °C to 70 °C, with a wide temperature microSD card needed below 0 °C, and meets CE and FCC Class A to EN 55032 and EN 55024 in a 43 x 77 x 104 mm case. For 0 to 10 V voltage signals, the IGT-33V is the matching version, and the IGT-31D adds isolated CAN bus to a digital I/O build.