# 5 The RMC
## 5.1 Introduction
The eSite RMC (see figure 5.1) is the complete hybrid site controller for smart control and online monitoring of any eSite Modular site, whether Off/Bad/Good/On-grid. It controls the Converter Units, genset operation and all power-related functions on site, including customer load management and monitoring of the batteries. Together with the incorporated RMS system eSite Tools, site data is analyzed and presented to the user. The RMC readily stays up-to-date by remote software updates and is capable of forwarding site data and reports to other selected platforms.
Figure 5.1. The eSite RMC unit.
The RMC has extensive communication possibilities, enabling communication with other equipment too, e.g. a Li-ion BMS and site specific sensors. The RMC is seamlessly integrated with the eSite Converter Units and associated systems on site.
The RMC can also be independently installed on a site with existing converters of any brand, and will then act as a generic hybrid site controller.
## 5.2 Remote Communication
The RMC acts as a gateway for storage and configuration of all site data, e.g. fuel level sensors, battery and cabinet temperature, BMS data, etc. It makes sure that data is available to the user via the eSite Tools RMS system, or by API for data extraction to any other RMS system, either via local site connection or via server-to-server connection. The RMC supports communication interfaces through RS485, CAN, WLAN, USB, Digital/Analogue IO and Modem connections. Detailed information to the user is provided in eSite Tools interface, accessible from anywhere when Internet connection is provided as intended. New functions and software updates can be loaded remotely without the need for a site visit. In case of interrupted communication to eSite Tools, data is buffered and automatically uploaded when communication is restored to have seamless data presentations.
There is also a user-friendly local web interface, accessed via Ethernet or the built-in WLAN access point, where Site Commissioning is performed. Furthermore, the front of the RMC has six LEDs for indication of the operational status for informational purpose when on site.
## 5.3 Technical specifications
The following table outlines the technical specifications for the RMC unit.
| **General** | |
| --------------------------- | ---------------------------------------- |
| Mounting | 1 U Height, 19” Rack System |
| Height x Width x Depth (mm) | 45 x 485 x 190 mm |
| Weight (kg) | 1,7 kg |
| Data storage/capacity | 400 MB |
| FOTA | Support For Firmware Over the Air Update |
| **DC Supply** | |
| -------------------------------------------------- | ------------------------------------------------ |
| Operational Range | -42 to -60 V DC |
| Typical Current Consumption (mA) | 100 mA |
| **DC Output** | |
| 12 V DC Supply CAN 1 Sensors Back Maximum Current | 500 mA |
| 12 V DC Supply CAN 2 Sensors Front Maximum Current | 200 mA (C2:9) |
| 12 V DC Supply General on Front | 500 mA (C3:9, C4:9 and C7:4) |
| 24 V DC Supply Maximum Current | 200 mA (C1:1) |
| 48 V DC Load Disconnect Control Current Maximum | 500 mA For Both Outputs, Short Circuit Protected |
| **Communication Ports** | |
| ---------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| I/O | 20 Digital In, Freely Configurable, 10 Digital Out, Freely Configurable, 4 Analog In, 2 Analogue Out, 2 Temperature Inputs for NTC 10 kOhm, Configurable Beta Value, 2 High Precision Voltage Measurement Inputs |
| External Bus | 2 x CAN, RS485, Ethernet |
| WLAN | Wi-Fi Access Point for Service |
| Radio Modem |
|
| Antenna Connector | SMA Female on Front |
| SIM | Standard (2FF) Located on Right Side |
| Service Port | Ethernet, USB, Wi-Fi |
| Load Disconnect Control | High and Low Priority Contactor PWM Controlled |
| Digital Inputs Thresholds | Up to 24 V DC Input, Threshold Digital In 1:>= 8 V, 0:<=5 V |
| Driving Capability Digital Outputs | 1 A / 30 V DC |
| Analog Input and Output Range | Differential Inputs +/- 10 V, Differential Outputs 0 – 10 V |
| High Precision Voltage Measurement Input Range | Differential Inputs 0 to 65 V |
| LED | 6 LEDs on Front for Indication of Status |
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