REMOTE MONITORING FOR RECTIFIERS, TEST POINTS AND BONDS with two-way communication and GPS-synchronized interruption
Building on the comprehensive monitoring capabilities of the RMU2, the RMU3 adds two-way communication for accurate, remotely controlled configuration and GPS-synchronized interruption of rectifiers. The RMU3 is a high reliability device engineered to control and monitor rectifiers, bonds and test points. The device provides GPS synchronized interruption functionality and is available in cellular or satellite communication configurations.
The field hardware consists of two primary components: a measurement terminal block (4-channel [compatible with MUX3 to expand to 16 channels] and 44-channel [RMU3-XL] options available) that is mounted inside the rectifier or a NEMA4 enclosure, and the antenna transceiver that is typically externally mounted. The RMU3 operates from a low voltage source such as a Class 2 transformer and has an internal battery backup system for short-term operation during power outages. Engineered for the lowest power consumption possible, the RMU3 is also suitable for TEG and solar applications. The RMU3 has integral high-energy surge suppression and provides unprecedented lightning immunity because there are no connections to electrical ground.
The RMU3 monitors and transmits nine channels of information – four high accuracy, galvanically isolated, AC/DC capable analog inputs are typically used to monitor volts, amps and/or 4-20mA signals from external equipment. An integral non-contact AC Line presence sensor can be used to determine if AC line voltage is present. An integral magnetic sensor can be used as a rectifier door sensor or tamper detection alarm. The RMU3 measures temperature and internal battery voltage and a user accessible switch can be configured to record site visit information. The RMU3 is also available with an optional “Measurement Recorder” which will capture analog readings every 6 hours and can store approximately 8 years of readings depending on your configuration.
Measurement data is wirelessly transmitted to the CorView Cloud Platform. CorView provides remote interruption control of the RMU3 equipped rectifier, manages all field data communications, maintains three years of measurement data, sends alarm exception and system performance emails, and controls password protected remote customer access. CorView is a highly secure environment that can be accessed using any web-enabled device as well as native iOS and Android apps. Measurement data is presented in an intuitive tabular format or graphical mapping display that color-codes abnormal measurement or site conditions for quick user interpretation. CorView can also provide near real-time email notification of abnormal measurement and alarm conditions.
| Features | Benefits |
|---|---|
| Fast, simple installation | The compact, weather-proof RMU3 is designed for the measurement terminal to easily fit inside a rectifier cabinet or a NEMA4 enclosure with an external antenna that has been tested and proven in the most extreme applications – the system can typically be installed in under an hour. |
| Designed for high accuracy and resilience | External analog channels are high impedance and galvanically isolated with multistage lightning protection. AC rejection filters are utilized for DC measurements to provide maximum accuracy. Several voltage ranges to accommodate a wide range of sensors (current shunts, reference cells, and direct voltage measurement) |
| Intelligently engineered with additional functionality and expandability | RMU3 platform has an AC Line Presence Sensor available to determine voltage is present, a magnetic sensor on enclosure doors that will alarm when unauthorized tampering occurs, an optional Measurement Recorder to capture analog readings, and a 4-20mA mode to receive signals from external equipment like the MOBILTEX TS1 temperature sensor. The MUX3 Channel Expansion Base Multiplexer allows for easy expansion with up to four RMU3-B bases to be connected to a single RMU3 antenna. Expands channel capacity to a maximum of 16 channels. |
| CorView Compatible – Multi-tenant Advanced Cloud Platform with OpenAPI and SOC2 Compliance | Engineered for the future on AWS to deliver the maximum security, scalability, open-compatibility and performance that will soon become system requirements for operators + eliminating issues when running “closed” legacy systems that restrict customers from accessible APIs |
| Multiple pre-defined configurations | The RMU3 can be utilized at test points and bond monitoring applications, in addition to the more conventional rectifier, TEG and solar applications. AC mitigation systems can also be monitored with an optional AC current transformer. |
| Intuitive controls and configurations | The RMU3 comes standard with an external “TEST” button and dual colour LEDs for manual controls. It can be easily programmed with our standard Programming Interface and a PC and can also be completed with a compatible iOS or Android-based mobile device and our available Bluetooth Interface. |
| Global communication capabilities | Available with cellular or satellite communication capability, the RMU3 can transmit data from virtually any location. This helps improve the quality and frequency of data collection, while reducing the need for workers to undertake long, potentially dangerous trips, to remote sites. |
| Smart readings and transmissions | To minimize airtime costs, the RMU3 stores four sets of periodic readings and then transmits all of those readings via four available factory-configured satellite or cellular data transmission plans. Irrespective of data plans, the RMU3 takes measurements every 6 hours, the device will immediately initiate a transmission when an alarm condition is detected. Alarms can be suppressed during interruption. |
| Built to withstand the toughest conditions | Lightning, surge and overvoltage protection — intelligently designed with no earth ground bond, there’s NEVER been a requirement to purchase additional surge protection or “hardening” with MOBILTEX RMUs + the broadest operating temperature range (-40° to +60°C [-40° to +140°F]). |
| Intelligent, flexible installation options for power & interruption | Wide range of options available designed to optimize performance and lower costs plus included integral battery backup system powers the device for approximately 16 hours (RMU3-G) or 10 hours (RMU3-S) during power outages. |
Specifications
| RMU3 Base – Environmental | |
|---|---|
| Operating Temperature | -40° to +70° C (-40° to +158° F) |
| Storage Temperature | -45° to +80° C (-49° to +176° F) |
| Maximum Altitude | 5000 meters above sea level |
| Humidity | 0 to 100% RH non-condensing |
| RMU3 Base – Physical + Power | |
|---|---|
| Weight | 200 grams (0.44 lbs) |
| Size | 135mm x 38mm x 38mm (5.3” x 1.5” x 1.5”) |
| Power Source | LPS or Class 2 CSA/UL approved (CSA 60950-1 or UL 60650-1) |
| RMU3 Antenna – Environmental | |
|---|---|
| Operating Temperature | -40° to +70° C (-40° to +158° F) |
| Storage Temperature | -45° to +80° C (-49° to +176° F) |
| Maximum Altitude | 5000 meters above sea level |
| Humidity | 0 to 100% RH non-condensing |
| RMU3 Antenna – Physical + Power | |
|---|---|
| Weight | 550 grams (1.2 lbs) |
| Size | 53mm x 77mm x 134mm (2.1” x 3.0” x 5.3”) |
| Power Source | 8.5 VDC nominal, supplied from RMU3-B |
Documents & software
| Name | Description | Type |
|---|---|---|
| MOBILTEX CorTalk RMU3 | Product Brochure ENGLISH | |
| MOBILTEX CorTalk RMU3 ES | Product Brochure SPANISH |
| Name | Description | Type |
|---|---|---|
| MOBILTEX CorTalk RMU3 Manual | CorTalk RMU3 Manual v1.11 |
| Name | Description | Type |
|---|---|---|
| CorTalk RMU3 Configuration Utility, Firmware and Drivers | RMU3 Install Pack v1.0.0.17 | ZIP |
| RMU3 Config Apple iOS App | Download from iTunes | Link |
| RMU3 Config Android App | Download from Play Store | Link |
| CorTalk Full Install Pack v1.0.0.25 | Downloads ZIP file | ZIP |
| LTE Swap Apple iOS App | Download from iTunes | Link |
| LTE Swap Android App | Download from Play Store | Link |
| CorView Apple iOS App | Download from iTunes | Link |
| CorView Android App | Download from Play Store | Link |
Frequently asked questions
Can I use the rectifier taps to power the RMU3-B?
No. It is not recommended due to less electrical isolation. CSA/UL installations require a class 2 energy limited power source. Power your RMU3 from the AC mains with our custom transformer available from Mobiltex which has breakdown voltage of 5000VRMS for improved lightning immunity (typical is only 1500VRMS). Mobiltex Part Number: T01A42TR201
Do I connect one wire from the RMU power transformer to earth/functional/chassis ground?
No. Select the two appropriate color of wires required for your input voltage. Cap off the unused wires individually.
For example, when using the TR20VA020 Transformer (Mobiltex Part Number: T01A42TR201):
120VAC: Connect the black and white wires across the hot and neutral 120VAC lines
240VAC: Connect the black and orange wires across the hot 240VAC lines
What does a flashing green LED on the RMU3-B indicate?
When the multi-purpose LED is flashing green, it will depend if the device was recently transmitting:
- If the RMU3 recently transmitted, the flashing green LED indicates it is waiting for an acknowledgement from CorView. Once the RMU3 receives the acknowledgment, the green LED will turn solid green.
- If the RMU3 is not transmitting, the flashing green LED indicates that the most recent reading is outside of the programmed measurement limits (alarms)
Media
Options
| Title | Image | Description | SKU (s) |
|---|---|---|---|
| RMU3 Wiring Kit |  | 1 meter (3.2 ft) wiring harness, assorted crimp terminals, cable ties, adhesive tie mounts. The components of this kit are typically used to interconnect the measurement signals from the rectifier, test point or bond to the RMU3-B. | Mobiltex P/N A20103RMU30 |
| Class 2 Transformer |  | 120 or 230 VAC to 12VAC 20VA. Lightning resistant 5,000V insulation. Foot or ½” conduit hub mount. | Mobiltex P/N T01A42TR201 |
| External 3:1 Voltage Divider |  | Required for applications that measure greater than 150VDC or 105VAC. Typically used when actual AC line voltage (110/120 or 220/230 VAC) measurement is desired. | Mobiltex P/N A01160RMU21 |
| Solid State AC Relay— 24-280 VAC RMS 50 Amps max |  | 0-8A = No Heatsink 8-50A = Needs HE-54 | Mobiltex P/N K0513245010 |
| Solid State AC Relay— 24-280 VAC RMS 110 Amps max |  | 0-8A = No Heatsink 8-60A = HE-54 60-110A = HE-90 | Mobiltex P/N K0513211010 |
| Solid State AC Relay— 48-530 VAC RMS 50 Amps max |  | 0-8A = No Heatsink 8-50A = Needs HE-54 | Mobiltex P/N K0513285010 |
| Solid State AC Relay—3 phase, 48-530 VAC RMS 50 Amps max |  | 0-4A = No Heatsink 4-30A = HE-90 | Mobiltex P/N K05232R5016 |
| Small Heatsink (HF92B) |  | For Solid State Relay (HF92B) | Mobiltex P/N X0301292B80 |
| Medium Heatsink (HE-54) |  | For Solid State Relay (HE-54) | Mobiltex P/N X030120HE54 |
| Large Heatsink (HE-90) |  | For Solid State Relay (HE-90) | Mobiltex P/N X030320HE90 |
| Solid State DC Relay (DCR1) |  | 0-60 VDC 50 Amps max (Complete unit including heatsink) | Mobiltex P/N A15060255C1 |
| Solid State DC Relay (DCR1+) |  | 0-100 VDC 100 Amps max (Complete unit including heatsink) | Mobiltex P/N A15060255C2 |
| Mercury Relay |  | 240 VAC @ 100 A, 48 VDC @ 100 A, 125 VDC @ 50 A | Mobiltex P/N K07111NC12D |
| Title | Image | Description | SKU (s) |
|---|---|---|---|
| 1-meter Interconnect Cable |  | 1-meter (3.2 ft) long interconnection/extension cable. Comes with molded waterproof connectors. | Mobiltex P/N W16400RMU03 |
| 3-meter Interconnect Cable |  | 3-meter (9.8 ft) long interconnection/extension cable. Comes with molded waterproof connectors. | Mobiltex P/N W16400RMU01 |
| 8-meter Interconnect Cable |  | 8-meter (26.2 ft) long interconnection/extension cable. Comes with molded waterproof connectors. | Mobiltex P/N W16400RMU02 |
| RMU1/2/3-BT Programmer Kit |   | Universal programming kit for RMU1, RMU2, and RMU3 devices. Includes RMU1/2/3 base programmer (A1506033101), RMU1ADP (A1506033001), Lithium-Ion battery pack, soft case and USB stick with programming software. Capable of Bluetooth communications with a phone/tablet. Can also be used with a PC through the USB connection. | Mobiltex P/N A20A0333101 |
| RBT1 Bluetooth Interface Cable |  | Allows programming of RMU3 using a Bluetooth Smart equipped smart phone or tablet. | Mobiltex Part Number A1506032101 |
| Title | Image | Description | SKU (s) |
|---|---|---|---|
| RMU3 Universal Mounting Bracket |  | Aluminium bracket, pipe clamp, and bracket mounting screws. This kit can be used for installations that require the RMU3-G or RMU3-S to be mounted in a configuration other then the top of the rectifier lid or applications using standard ½” NPT electrical fittings. This kit allows mounting on either vertical or horizontal surfaces as well as vertical pipe or pole installations. | Mobiltex P/N A20103RMU31 |
| 4-20mA Transducer Shunt Kit |  | Kit of 4 precision 250 ohm resistors for installations using 4-20mA measurement transducers. Not applicable to RMU3X-B. | Mobiltex P/N A20003RMU21 |
| MUX3 Channel Expansion Base Multiplexer |  | Allows up to four RMU3-B bases to be used with a single RMU3 antenna. Expands channel capacity to a maximum of 16 channels. Bases and interconnect cables are purchased separately. | Mobiltex P/N A1506030901 |
| DRT1 Dual Relay Timer for RMU3 |  | Allows taking advantage of both Mercury and Solid-State relays’ strengths. Use a Mercury Relay to be the main conductive path in normal functioning while allowing an SSD to take over during interruptions’ period. The Mercury Relay will close again after 30 seconds without interruptions. | Mobiltex P/N A1506035601 |
