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370C LTE Cellular to 2 Form C Relays, 4 Dry-Contact Inputs, 2 A/D Inputs and 1-Wire, Multifunction SeaConnect I/O Module, Powered by SeaCloud
370C LTE Cellular to 2 Form C Relays, 4 Dry-Contact Inputs, 2 A/D Inputs and 1-Wire, Multifunction SeaConnect I/O Module, Powered by SeaCloud

Part# 370C-AV00

(SeaConnect 370C)

LTE Cellular to 2 Form C Relays, 4 Digital Inputs, 2 A/D Inputs and 1-Wire Bus, SeaConnect Multifunction I/O Edge Module, Powered by SeaCloud

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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. For example, the event engine can log data to Sealevel's SeaCloud IIoT platform and send an alert if a tank level is too high or pressure valve is out of range. 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 Verizon network (other cellular modules and networks are available). 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. SeaCloud is a turn-key Software as a Service (SaaS) cloud application that works out-of-the-box and includes many IIoT features that allow you to start using it without additional programming. To experience the powerful features of the SeaCloud IIoT service, the 370C includes a trial month of SeaCloud service and 25MB of cellular data at no charge. You can continue the SeaCloud service, which includes 25MB of LTE cellular data, for a flat rate of only $30/month (call for details on attractive volume discounts). You can purchase additional cellular data in blocks of 25MB for only $10/month. Subscription plans are month-to-month with no long-term contracts required. 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 own cloud application — call us for details.

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 -20C to +70C (-4F to +160F). 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 turn-key solution. Call us to see how Sealevel can help you realize your IIoT vision.
Brand/Family SeaConnect
Host Interface(s) LTE Cellular, Wi-Fi (802.11bgn)
Modbus Yes
Digital I/O Isolated Inputs, Form C Relay Outputs
Analog I/O A/D Inputs
RoHS Compliant Yes
Number of Inputs/Outputs 2 Form C Relays, 4 Digital Inputs (Dry or Wet), 2 A/D Inputs
A/D Inputs 2 Differential
A/D Resolution 12-bit (10-bit effective)
A/D Range 0-10 V or 0-24 mA (software configurable)
ADC Impedance 900 kΩ
ADC Sampling Rate Fixed 16 µs / channel (Equivalent to 62.5 kS/s / channel)
Power Requirement 5 VDC @ 10 W max.
Output Isolation 1500 Vrms
Contact Voltage 60 VDC max.
Contact Current 2 A max.
Contact Operate Time 5 ms max.
Contact Release Time 5 ms max.
Field Wiring 16-30 AWG
Operating Temperature -20 to +70C (-4 to +160F)
Storage Temperature -50 to +105C
Humidity Range 10 - 90% Relative Humidity, Non-Condensing
Dimensions 4.00 (L) x 2.03 (W) x 1.14 (H)
(5.10 (L) Including mounting flanges)
SeaConnect 370C Features
  • • Integrated LTE CAT1 single-band cellular communication chip
  • • Cellular chip certified for use in United States on Verizon network (other cellular modules and networks available)
  • • 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 to +70C (-4 to +160F)
  • • Status LEDs for power and data activity
  • • Compact, plastic enclosure with mounting flanges

SeaCloud Features (Optional)
  • • Low monthly subscription plans with attractive volume discounts available
  • • Subscription plans are month-to-month with no long-term contracts
  • • 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
  • • Includes 1-month trial SeaCloud subscription plan with 25MB cellular data (SC00C)
  • • 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)
  • • Additional items available as accessories

SeaConnect LTE Data Plan
SeaConnect LTE Data Plan


SeaConnect QuickStart Module
SeaConnect QuickStart Module


SeaCloud Cellular
SeaCloud Cellular


The Digital I/O Handbook
The Digital I/O Handbook


The Digital I/O Handbook (*Free)
The Digital I/O Handbook (*Free)



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