EMCP 3 and 4 Gateway
WHAT IS EMCP3/4 Gateway?
EMCP 3 and 4 Series Gateway for Caterpillar® Generator Monitoring
A pre-configured solution that gathers data from the CAT® EMCP 3 and 4 series of diesel generators and places the values in contiguous registers.
This product is a Gateway that has been designed for diesel generator monitoring specifically in the Caterpillar® EMCP3 and 4 series of diesel generators. With this series of diesel generators, the primary link between the Generator Set Controller (GSC) and the Engine Control Module (ECM) is an S.A.E. J1939 link and not Cat® Data Link as is the case with Caterpillar®’s other products.
To provide monitoring for these gensets, Monico has developed the EMCP 3/4 Gateway™ which is pre-configured to gather data from the genset and place the values in contiguous registers for remote monitoring. Monico can provide not only operational data such as engine parameters and electrical data, but also DM1 Active Diagnostic Codes and DM2 Inactive Diagnostic Codes. The development of this series of Gateways allows for effective Caterpillar® generator monitoring in this line of gensets.
Benefits & Features
- Over 400 pre-configured solutions
- C-UL approved for Class I Div II groups A-D locations
- 0-15 times faster than other customer communications products
- Automatic engine detection and configuration
- Built-in USB interface shows all available parameters on a specific installation
- Gather data from other assets through available ports
- LED indication lights for communication and power confirmation
- Full diagnostic and fault code support with text descriptions
- Pulls parameters at a rate of approximately 20 – 60 parameters per second
An EMCP3/4 Diesel Generator Monitoring Gateway
The EMCP3/4 Gateway™ provides a way for users to integrate their genset into a diesel generator monitoring system of their choosing. Monico can simply provide the data collected directly to the user, or it can take the data collected and integrate it into an overall monitoring system. The ability to distribute the data in a variety of ways makes this Gateway a very flexible device.
Gateways come pre-configured to map 148 common data parameters and 180 flags, and Monico’s free software, MoncioView II™, allows for settings and adjustments to be made in the field if needed. The Gateways require 24 VDC power, are din-rail mounted for easy installation and set up is plug and play in most cases for a qualified technician with basic computer skills.
Monico’s Gateways support multiple engine ECMs, and there are many protocols available for output to any industrial device. The Gateway can act as a Modbus RTU or TCP Slave, BACnet slave, or act as a master to push data to Allen Bradley, GE Fanuc, and Siemens PLC’s. Available add on modules allow for digital I/O, thermocouple inputs, RTD inputs, analog output modules and analog input modules.
These above mentioned DM1 Active Diagnostic Codes and DM2 Inactive Diagnostic Codes allow for repair technicians to have advance notice of the diagnostic codes so that they are more likely to have the parts necessary for a repair and complete any needed repairs more quickly, saving valuable operating hours.
Diesel Generator Monitoring Systems
The EMCP3/4 Gateway™ supports over a hundred different protocols, and has three host ports to choose from including two RS-232 ports, one RS-485 2-wire or 4-wire, and one Ethernet port. In addition, it can accommodate optional input/output modules that allow the user to input bearing temperatures, winding temperatures, fuel level and digital inputs from ancillary equipment. Analog digital outputs allow for remote start/stop on generators and provide analog signals to other control equipment.
The convenient USB user interface allows each customer to configure the ports and assign device addresses and IP addresses. Installing a USB driver on a computer in the office or in the field and plugging into the USB port causes the user interface to appear and provides a clear view of each port and the configuration parameters. The user interface also shows you exactly which parameters are responding on your particular installation and the raw value in that parameter.
These features, combined with ease of use, make this Gateway an asset for any Diesel Generator Monitoring System.
Future-proof your monitoring system
Looking for the Next Generation of Industrial Monitoring?
Monico’s mCore® SDR is the powerful evolution of our trusted gateway technology — combining protocol conversion, edge processing, and remote connectivity in one intelligent device. With onboard analytics, flexible I/O, and seamless integration to the cloud or MonicoLive™, mCore® SDR gives you more visibility, control, and scalability than ever before.
How to Choose The Right Gateway
Monico Gateway Product Comparison – Gateways vs. mCore® SDR
| Feature / Use Case |  CDL Gateway™ |  CPC Gateway™ |  J1939 Gateway™ |  EMCP 3 & 4 Gateway™ |  mCore® SDR |
|---|---|---|---|---|---|
| Primary Use | Monitoring Caterpillar® engines/gensets via CDL | Multi-device protocol conversion for varied industrial systems | Monitoring J1939 CAN-based engines and mobile equipment | Caterpillar® EMCP 3 & EMCP 4 controller data acquisition | Edge data acquisition, protocol conversion, analytics, and remote connectivity |
| Supported Protocols | CDL (Cat Data Link) + selected outputs | 100+ protocols (Modbus, Siemens, BACnet, DeviceNet, etc.) | J1939 + supported outputs | Proprietary EMCP 3.x and EMCP 4.x protocols + Modbus, Ethernet/IP, etc. | 100+ protocols (Modbus, Ethernet/IP, MQTT, OPC UA, BACnet, etc.) |
| Automatic Equipment Detection | ✔ Yes | ✔ Yes | ✔ Yes | ✔ Yes | ✔ Yes |
| Edge Processing / Local Analytics | ❌ No | ❌ No | ❌ No | ❌ No | ✔ Yes – built-in logic engine, thresholding, event handling |
| Cloud Connectivity | ❌ Requires integration | ❌ Requires integration | ❌ Requires integration | ❌ Requires integration | ✔ Yes – native support for MonicoLive™, MQTT, Azure, etc. |
| Pre-configured Parameters | 400+ CDL registers | 400+ across multiple protocols | 100+ J1939 parameters | Pre-mapped EMCP 3 & 4 data points | ✔ Preloaded templates + customizable mapping |
| Real-Time Data Polling Speed | 20–60 parameters/sec | 20–60 parameters/sec | ~20 parameters/sec | Moderate polling speed depending on controller model | ✔ High-speed, multi-threaded polling |
| Custom Logic & Alerting | ❌ No | ❌ No | ❌ No | ❌ No | ✔ Yes – programmable alerts, conditions, and data-driven actions |
| USB Interface for Diagnostics | ✔ Yes | ✔ Yes | ✔ Yes | ✔ Yes | ✔ Yes |
| Built-in I/O Capability | Optional modules | Optional modules | Optional modules | Limited or none | ✔ Native I/O: analog, digital, RTD, thermocouple, relay options |
| Ideal Equipment Type | CAT® engines, gensets (EMCP, 3400, 3500, etc.) | Engines, PLCs, drives, sensors in multi-vendor environments | Mobile equipment with J1939 CAN protocol | CAT® gensets using EMCP 3.x and EMCP 4.x control panels | Any industrial asset requiring smart monitoring, data forwarding, and edge intelligence |
| Simultaneous Protocol Support | 1 input + configurable output | Up to 9 protocols simultaneously | 1 input + configurable output | 1 or 2 protocols | ✔ Multi-protocol support, field + cloud |
| Installation Time | Minutes (plug-and-play) | Fast setup, custom config available | Quick install | Pre-configured, but may require protocol setup | ✔ Easy setup with intuitive tools + remote provisioning |
| Target User | CAT® engine operators | Integrators managing mixed-protocol environments | Fleet owners using J1939 equipment | Operators of CAT® gensets using EMCP controllers | OEMs, industrial operators, and anyone modernizing with edge-to-cloud monitoring |
| Hazardous Location Approval | ✔ Class I, Div II Groups A-D | ✔ Class I, Div II Groups A-D | ✔ Class I, Div II Groups A-D | ✔ Class I, Div II (where applicable) | ✔ Available in hazardous-location rated configurations |
Why Monico
Key advantages that set us apart
Your Data is Yours
Your data is securely collected and stored, always remaining under your control, so you can make informed decisions without concerns about data accessibility or third-party restrictions. We’re here to empower you with the insights you need, not limit how you use your data.
Preconfigured, No Coding Required
Our solutions come preconfigured and ready to deploy without the need for complex coding or development. This plug-and-play approach gets you up and running faster, no coding or data analysis required.
Modern Intuitive Platform
Our platform is designed with you in mind, combining modern functionality with an intuitive interface that simplifies data monitoring and visualization. With Monico, you’ll experience an easy-to-navigate system that makes it simple to access, interpret, and act on your data.
OEM-Agnostic, Multi-Protocol Support
Our gateways are preconfigured for your specific equipment and work seamlessly with most major industrial OEMs. With broad protocol support, they easily integrate into mixed fleets—no custom coding or complex setup required.
EASY AS 1,2,3
The Shortest Path to Real-Time
Actionable Intelligence™
1
Schedule a Demo
We’ll walk you through the process and share examples grounded in real data. No big sales pitch. We’ll discuss the problems you’re trying to solve, identify your needs and address your questions about ROI, security, the implementation process, and more.
2
Let Us Configure Your Solution
We won’t just sell you a gateway and wish you luck. Our powerful solutions are simplified for each customer by being pre-configured, down to the serial number of each asset. You’ll easily access data and gain insights from day one, without struggling with siloed data or differing protocols.
3
Count On Us for Support
Our job isn’t done until implementation is successful and you’re getting data exactly the way you want it, where you want it. We’ll provide installation, training and support. In addition, our online resource library is available 24/7.
FAQs
Frequently Asked Questions
What is the EMCP 3/4 Gateway™ used for?
The EMCP 3/4 Gateway™ is a pre-configured communication device designed specifically for Caterpillar® diesel generator sets using EMCP 3.x and EMCP 4.x control panels. It enables efficient extraction of real-time data for remote monitoring and diagnostics.
What kind of data does it provide?
The Gateway captures key operational parameters such as engine speed, oil pressure, voltage, frequency, and current. It also supports active (DM1) and inactive (DM2) fault codes, giving maintenance personnel the insights they need to proactively service equipment.
Is the EMCP 3/4 Gateway™ easy to install?
Yes. It’s DIN-rail mountable, requires 24 VDC power, and supports plug-and-play setup for most technicians. The built-in USB interface provides a clear, visual configuration tool for setup and troubleshooting.
Which communication protocols are supported?
The Gateway supports over 100 industrial protocols and can be configured to act as a Modbus RTU/TCP slave, a BACnet device, or to push data to Allen Bradley, GE Fanuc, or Siemens PLCs. It includes RS-232, RS-485, and Ethernet ports for flexibility.
Can this integrate with my existing monitoring system?
Yes. The Gateway outputs clean, structured data and supports most major industrial protocols, making it easy to integrate with your SCADA, PLC, or remote monitoring system.
What makes this gateway different from others?
Unlike general-purpose converters, the EMCP 3/4 Gateway™ is built specifically for CAT® gensets that use an S.A.E. J1939 link (instead of the CDL protocol). It gathers engine and electrical data, as well as DM1 and DM2 diagnostic codes, and maps that data into contiguous registers for easy integration with monitoring systems.
How many data points are pre-configured?
Each unit comes with 148 pre-mapped standard parameters and 180 system flags, ensuring robust monitoring coverage with minimal setup. Additional customization is possible using Monico’s free MonicoView II™ software.
Can it be used in hazardous environments?
Yes. The EMCP 3/4 Gateway™ is C-UL approved for Class I, Division II, Groups A-D hazardous locations — making it suitable for tough industrial and remote applications.
Is there a modern alternative to the EMCP 3/4 Gateway™?
Yes. While the EMCP 3/4 Gateway™ is an excellent solution for current CAT® gensets, Monico’s mCore® SDR offers enhanced capabilities like onboard analytics, cloud integration, and native support for edge processing — providing a future-ready path for generator monitoring and beyond.
How fast does the Gateway collect data?
It polls approximately 20–60 parameters per second, offering fast, responsive updates suitable for real-time monitoring and integration.
