Nimbus IoT Edge Processing Interface

Nimbus IoT Edge Processing Interface

Nimbus IoT Edge Processing Interface

2x 4-20mA inputs non-isolated, 4 digital inputs

Additional information

Weight 0.908 kg
Dimensions 2.3 × 10.1 × 12 cm
Power Supply

HV – 85-265V AC/DC
LV – 10-32V DC

Wireless comms

No Wireless comms
CM1 – Cell modem (eMTC) LTE Cat-M1
WIF – WiFi (801.11)

Serial comms

No RS232/RS485 comms
RS – RS232/RS485 port

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What it does

Collates signals from sensors for processing and publishing to the Cloud. Can perform calculations prior to transmitting this data. Requires Bridge Key for programming. Part of the Define Instruments IoT machine monitoring solution.

Data visibility for better machine performance

The Nimbus IoT collates signals from industrial equipment for processing and publishing to the Cloud. Designed for monitoring small machines and automation systems it enables data visibility for determining machine health or process efficiency. It features industrial grade digital inputs, relay contacts and analog process (4–20mA) input channels to easily link process sensor inputs and standalone machinery to Industrial IoT cloud services.

Collect field operating data from your machine

The Nimbus IoT built-in cloud interface sends data from your machine directly to the Cloud – useful for facilities maintenance monitoring, replenishing consumables and remote diagnostic monitoring.

Direct wireless interface to field process inputs

Nimbus IoT converts, conditions and processes analog signals directly to wireless WiFi (801.11) or (eMTC) LTE Cat M1. No additional wireless modem required.

Easily integrates with your existing automation equipment

The Nimbus IoT natively supports MQTT Industrial IoT communications protocol. ModBus RTU master/slave communication port directly interfaces to metering and control automation. Application use cases include AMR (automatic meter reading), monitoring of remote asset productivity, energy consumption, and consumable supply tank levels. Nimbus onboard logic engine allows customization tailored to specific measurement and monitoring requirements.

Extra cloud interface security and Store and Forward data integrity

Connection and data security are paramount so the Nimbus IoT provides peace of mind with Transport Layer Secu- rity (TLS 1.2) protocol. In the event of a network communications failure the Nimbus IoT Store and Forward function buffers data locally, forwarding to the cloud server once network communications are reinstated, securely monitor- ing and recording with total data integrity.

Get the datasheet

Nimbus Datasheet A4 v1

Try Before You Buy!

Use the product simulator inside our free WorkBench software to demo how this instrument works.

Bridge Key Required!

In addition to this software a Bridge Key is required for the configuration of this product.

You must order one unless you already have one from a previous product purchase.

5 Year WarrantyRCM E2180CE
5 Year WarrantyRCM E2180CE



Number of input channels: 2

Input configuration: 2x 4-20mA

Input isolation: Not isolated to pwer supply or digital inputs

Excitation: 24V DC @ 200mA maximum. Total on all +24V output pins.

Sampling rate: 1Hz

Resolution: 12 bits

Accuracy: <±1.0% fso


Power supply: 85-265V AC/DC (HV) 10–30V DC (LV)

General Specifications

Noise immunity: (CMRR) 160dB tested at 300V RMS 50Hz

RF immunity: <±1% effect fso

Permanent memory: (E²ROM) 100,000 writes per input parameter

Linearity & repeatability: <±0.1%

Current Input

Range: 0–20mA, 4–20mA

Input impedance: 45Ω

Max over-range: Protected by PTC to 24V DC

Linearity & repeatability: 0.1% FSO max

Accuracy: 0.1% FSO max

Channel separation: 0.001% max

Ambient drift: 0.003%/°C FSO typical

Digital Pulse Input

Accuracy: ±0.5%

Relay Output

Number of relay outputs: 3

Relay output type: 1x Change over Form C Relay (15A 250V AC or 15A 30V DC), 2x Form A Realys (3A 250V AC or 3A 30V DC)

Comm Port(s)

Number of comm ports: 1

Protocols: Modbus RTU, RS485, RS232 or Define ASCII, EIA485 compliant

Port 1: RS485/RS232: Default comm port RS485 / RS232 auto-select. Selectable baud rate 2400–230000 baud. Format 8 bit, no parity, 1 stop bit

RS485/422 isolation: Yes

Digital Inputs

Number of digital inputs: 4

Digital input type: Open collector (NPN, PNP), Clean Contact, Voltage 2–30V DC

Input types: NPN, PNP, Clean Contact, Voltage 2–30V DC

Functions: Status, up counter, up/ down counter with direction, debounced counter, frequency, gated frequency

Counter register output: 32 bit

Frequency range: 0–10,000Hz (Reduced to 0–1,000Hz in Sleep Mode)

Threshold: 1.65V

Debounce counter range: 0–100Hz

Isolation: Not isolated to power supply or analog inputs

Data Logging

Real-time clock: RTC time base UTC. Local time in device with automatic daylight savings adjustment

Data logging: 31,774 Samples with up to 30 parameters plus time stamp per sample. 32MB capacity.

Datalog retrieval: Simple data log retrieval and visualization, using Define WorkBench


USB programmable: Via ‘PC Setup’ port using Bridge Key USB programmer (sold separately)

Define WorkBench: Simple configuration and datalog retrieval using Define WorkBench


Casing: DIN 35 rail mounting; Material: ABS inflammability V0 (UL94). Phoenix type removable screw connectors.

Dimensions (H x W x D): 3.98 x 0.91 x 4.72″ (101 x 23 x 120mm) Excludes antenna and connectors

Environmental Conditions

Operating temperature: –40 to 176°F (–40 to 80°C)

Storage temperature: –40 to 176°F (–40 to 80°C)

Operating humidity: 5–85% RH max, non-condensing

Certifications & Compliances

EN 61326-1:2006

UL listed: Pending

EMC: Emissions EN 61326-1 2006 Class A; Immunity EN 613265-1 2006 Industrial Locations; EN50581: 2012 RoHS; Safety EN 61010, 1:2010


Nimbus IoT Manual (Nim2) 19v1, 04-Nov-2019 | (1661 KB)
Nimbus IoT Datasheet A4 19V01 A4, 26-Sep-2019 | (752 KB)
Nimbus IoT Datasheet US Letter 19V01 US Letter, 26-Sep-2019 | (752 KB)


Define WorkBenchDefine WorkBench

Simple software to program your Zen series or edge processing device

Use Define WorkBench to simulate, configure and view data for all Zen series control stations and Nimbus IoT Gateways, including:

With a user-friendly, uncluttered design, WorkBench offers a simple interface for setting up and scaling your unit, as well as retrieving and graphing your datalog.

N.B. Version 3 features Simulation Mode and is only compatible with legacy ZEN-16 firmware 2.0.0 and later.

Define WorkBench

Order Codes


RS232/485 Comms
No RS232/485 communications
-RS 2 x RS485 / RS232
Power supply
-HV 85–265V AC/DC
-LV 10–32V DC
Wireless Comms
-CM1 Cellular modem (eMTC) LTE Cat-M1
-WIF WiFi (801.11)
Sample order code: NIM2-RS-HV-CM1


Bridge Key USB Bridge Key and communications kit (Sold separately)
Define WorkBench Simple utility for setting up your Nimbus

All prices are in US Dollars. For pricing in other currencies, please contact us.