SeaConnect 370C LTE Cellular IIoT Edge Device

Part: 370C-AT03   Model: SeaConnect 370C

QuickStart Demonstration Module


  • Rugged, industrial IoT edge device to remotely monitor and control the status of real-world processes.
  • Integrated LTE CAT1 cellular chip certified for use in USA on T-Mobile network (other modules and networks available).
  • Integrated and certified 2.4 GHz Wi-Fi (IEEE 802.11b/g/n) connectivity.

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The SeaConnect 370C is an Industrial Internet of Things (IIoT) edge device that allows you to remotely monitor and control the status of real-world I/O processes. The module features a powerful, integrated event engine that is configured using an intuitive web-based interface to send alerts and trigger actions when specific conditions are met.

The 370C is designed to work with the Sealevel SeaCloud IIoT platform. For example, the event engine can log data to SeaCloud, which sends an alert if a measurement crosses a defined threshold. These alerts help automation engineers, technicians, production managers and network operators make informed, critical decisions. The 370C is ideal for a variety of applications, including facility management, environmental monitoring, water and wastewater treatment, as well as broadcast automation.

The module integrates an LTE CAT1 single-band cellular communication chip certified for use in the United States on the T-Mobile network. For maximum range and throughput, an ultra-wideband LTE sail antenna is also included. The IP67-rated, UV-resistant dipole swivel antenna provides 3dBi+ peak gain with 70% efficiency and can be rotated up to 90 degrees in both directions.

The 370C features a TI SimpleLink™ CC3200 ARM Cortex-M4 microcontroller unit (MCU) with a certified Wi-Fi (802.11bgn) interface and WPA2 encryption for a secure connection to your wireless network. The module includes a variety of I/O interfaces, including two Form C relays, four digital inputs (wet or dry contact) and two 12-bit A/D converters (ADC). Each ADC can be software-configured for either 0-10 V voltage or 0-24 mA current measurement mode. There is a convenient interface for connecting 1-Wire® temperature probes. An optional QuickStart module is available for demonstration and testing purposes.

The Sealevel SeaCloud service is a secure, robust, scalable, IIoT platform designed to track, monitor, analyze and control data from Sealevel I/O devices. Our Software as a Service (SaaS) cloud application works out-of-the-box and includes many IIoT features that allow immediate use without additional programming. At its heart, SeaCloud is designed as a Platform as a Service (PaaS) that can be private-labeled and modified by Sealevel to meet your specific requirements. The 370C also supports the free service, or it can be customized to work with your cloud platform of choice.

To experience the powerful features of the SeaCloud IIoT platform on your 370C device, sign up for a SeaCloud cellular subscription.

The 370C is powered by 5 VDC via a removable 2-pin terminal block. I/O connections to field wiring are simplified via removable 3.5mm terminal blocks. The module is housed in a small, rugged plastic enclosure that is ideal for mounting to a variety of surfaces or inside panels. Standard operating temperature range is -20°C to 70°C (-4°F to 160°F). LEDS on the face of the module show device status and data activity.

The 370C is feature and connectivity compatible with Sealevel eI/O and SeaI/O modules. Your applications that are designed for those products can be adapted to work with the 370C. Additionally, the module can be used on a Wi-Fi network without requiring connectivity to a cloud service. Communicate with the 370C module using industry standard Modbus TCP protocol or use the Sealevel SeaMAX API software libraries from your application program. Sealevel’s SeaMAX software drivers and utilities make installation and operation easy using Microsoft Windows operating systems.

The Sealevel Modbus Connect app for iOS allows you to access the registers, coils and discrete I/O of your Sealevel Modbus devices and is available on the App Store. Use the app to remotely access I/O in the field or for testing and troubleshooting during application development. The Sealevel Mod+ Connect app is an easy-to-use diagnostic utility that allows you to monitor, test and troubleshoot Sealevel SeaConnect, eI/O and SeaI/O modules using your iPhone, iPod touch or iPad mobile device.

Do you need an application-specific IIoT device and cloud solution? Sealevel can provide a number of services from design, application-specific cloud instances, cellular data plans and even billing services for a complete solution. Call us to see how Sealevel can help you realize your IIoT vision.


Additional information



Host Interface(s)

LTE Cellular, Wi-Fi (802.11bgn)


Modbus TCP

Power Requirement

5 VDC @ 10 W max.

Field Wiring

16 – 30 AWG

RoHS Compliant


Number of Inputs/Outputs

2 Form C Relays, 4 Digital Inputs (Dry or Wet), 2 A/D Inputs

Output Type

SPDT Form C relays

ADC Impedance

900 kΩ

ADC Sampling Rate

Fixed 16 µs / channel (Equivalent to 62.5 kS/s / channel)

Digital I/O

Form C Relay Outputs, Isolated Inputs

Contact Voltage

60 VDC max.

Contact Release Time

5 ms max.

Contact Operate Time

5 ms max.

Contact Current

2 A max.

Analog I/O

A/D Inputs

A/D Resolution

12-bit (10-bit effective)

A/D Range

0-10 V or 0-24 mA (software configurable)

A/D Inputs

2 Differential


4.00 (L) x 2.03 (W) x 1.14 (H)(5.10 (L) Including mounting flanges)

Operating Temperature

-20°C to 70°C (-4°F to 158°F)

Storage Temperature

-40°C to 85°C (-40°F to 185°F)

Humidity Range

10 – 90% Relative Humidity, Non-Condensing

SeaConnect 370C Features

  • Integrated LTE CAT1 single-band cellular communication chip
  • Cellular chip certified for use in United States on T-Mobile network
  • Includes ultra-wideband LTE sail antenna for maximum range and throughput
  • Cellular antenna provides 3dBi+ peak gain with 70% efficiency
  • IP67-rated, UV-resistant dipole swivel antenna can be rotated 90 degrees in both directions
  • Features a TI CC3200 ARM Cortex-M4 MCU
  • Integrated and certified 2.4 GHz Wi-Fi (IEEE 802.11b/g/n) connectivity
  • Supported wireless protocols: Modbus/TCP, TCP/IP, UDP, DHCP and HTTP TCP/IP Stack
  • Supports simultaneous TCP, UDP or RAW sockets
  • Supports simultaneous SSL 3.0 sockets
  • Crypto engine with 256-bit encryption for secured WLAN connections
  • (2) 12-bit differential A/D inputs, each software configurable for 0-10 VDC or 0-24 mA mode
  • (2) Form C relay outputs, each rated for 30 VDC @ 1A max
  • (4) Digital inputs (wet or dry contact)
  • Convenient 1-Wire® bus interface supports up to ten temperature probes
  • Field wiring is simplified via removable 3.5mm terminal blocks compatible with 16-30 AWG wire
  • Requires 5 VDC input power @ 2A max via 2-pin removable terminal block
  • Operating temperature range of -20°C to 70°C (-4°F to 160°F)
  • Status LEDs for power and data activity
  • Compact, plastic enclosure with mounting flanges

SeaCloud Features (Optional)

  • Manage devices, provision fielded units and configure trigger actions
  • Data can be automatically pushed to the cloud
  • Monitor connectivity status over time and diagnose issues remotely
  • Receive email and SMS alarms whenever something needs attention
  • Web configuration accessible by mobile device
  • Control available relay and digital outputs from virtually anywhere
  • Private-label and brand your instance

What’s In the Box?

  • SeaConnect 370C LTE Cellular & Wi-Fi multifunction I/O edge module
  • LTE Ultra-Wideband 3 dBi+ dipole sail antenna (104264)
  • 100-240 VAC to 5 VDC @ 4 A desktop power supply with US power cord (TR151-US)
  • 10 Insulated Jumper Wires (CA603)
  • Optional QuickStart demonstration module, wiring harness & battery pack (QSM100-KT)
  • Additional items available as accessories


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