Description

Gain deep insight into the performance of your CP system with continuous remote monitoring capabilities. The RMU3 is a small, two-piece device that can be easily installed into a rectifier cabinet and features a full range of configurable functions to collect critical measurement data.

Two-way information can be transmitted via satellite or cellular network as frequently as every few hours to provide a highly detailed view of the CP system and identify short-lived events that may impact CP performance.

When combined with CorView web analytics platform, pipeline operators can use a network of RMU3 devices to instantly evaluate overall CP performance, identify areas of concern and remotely manage interruption activities.

Key Features

Compact, weatherproof devices are designed to be quickly and easily installed in existing rectifier cabinets or test stations
Available with satellite or cellular communications for maximum service coverage with economical fixed rate operational communication costs
No connection to ground for superior lightning and surge protection
Highly accurate and reliable data collection and GPS-synchronized interruption
High reliability, long operational life design, low capital equipment cost
Operation in -40 to +60°C (-40 to +140°F) temperatures
IP67 sealed enclosure and cabling for harsh environments
Fast, simple configuration via PC, iOS or Android app

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Features

Features

Simple and very quick to install (typically under 1 hour)
High reliability, long operational life design
Low capital equipment cost
Economical fixed rate operational communication costs
Satellite or LTE cellular models for maximum service coverage
Four galvanically isolated analog input channels
Each analog channels is bi-polar with 150mV (50 and 100mV current shunts), 22V, 150V, and 4-20mA measurement ranges
Each analog channel can be configured to read DC or True RMS AC (i.e. induced AC measurements)
DC analog channels include >65bD of 50/60Hz AC rejection
All analog channels are high impedance and allow direct connection to reference half-cells
Analog channel measurement accuracy of ±0.5% DC and ±1% ACFS over -40 to +70°C (-40 to +158°F)
Programmable low and high alarm window capability on each analog channel with report by exception facilities
Scheduled reporting of data based on customer selected plan (every 6 hours, daily, every 2 days, or weekly readings)
Each channel has independent very high lightning protection
No connection to ground for maximum lightning immunity
Internal temperature measurement and reporting
Internal wide temperature range rechargeable battery system provides 16 hours (RMU3-G) or 10 hours (RMU3-S) of backup
GPS antenna / GPS receiver and high gain LTE or satellite antenna integral to transceiver
Compact two piece mechanical design
Termination block assembly is 135mm x 38mm x 38mm (5.3” x 1.5” x 1.5”) and typically mounts inside the rectifier
Antenna transceiver assembly is 134mm x 77mm x 53mm (5.3” x 3.0” x 2.1”) and mounts externally with a view of the sky
Components connect together with a single polyurethane cable with small (0.5” diameter) molded waterproof connectors
Antenna transceiver includes a bottom side ½” threaded receptacle that mates directly to electrical conduit fittings
Easy configuration through a USB PC interface
Rectifier GPS position information transmitted to corView host
IP67 sealed enclosure and cabling for harsh environments
Operation in -40 to +70°C (-40 to +158°F) temperatures
Integral voltage sensor for safe and lightning immune detection of supply voltage presence
Magnetic door switch / tamper sensor with exception report
Optional: 8 year internal measurement recorder locally stores all readings sampled every 6 hours

Specifications

Specifications

RMU3-B (Base Unit):

Environmental:
Operating Temperature:	-40 to +70°C (-40 to +158°F)
Storage Temperature:	-45 to +80°C (-49 to +176°F)
Humidity:	0 to 100% RH non-condensing
Pollution Degree:	1
Maximum Altitude:	5000 meters above sea level
Physical:
Size:	135mm x 38mm x 38mm (5.3” x 1.5” x 1.5”)
Weight:	200 grams (7 oz)
Enclosure:	UV stable, wide temperature polycarbonate
Mounting:	Mounted inside a rectifier
Power:
PWR IN Operating voltage range:	9 to 18 volts AC (50/60Hz) or 9 to 22 volts DC
Power (less relay drive):	5 VA maximum (Including RMU3-G)
Power (with relay drive):	15 VA maximum (Including RMU3-G)
Power Source:	LPS or Class 2 CSA/UL approved (CSA 60950-1 or UL 60650-1)
Measurement Inputs:
Analog Measurement Type:	Category 2 (as per CSA C22.2 – 61010)
Analog Ranges (DC & AC):	+/- 150mVDC only +/- 22VDC, 16V true RMS +/-150VDC, 105V true RMS (+/- 119VDC for TEG sources) 4-20mA (with external precision shunt resistor)
AC Rejection on DC Readings:	>65dB @ 50/60Hz
External Analog Channels :	4 galvanically isolated, high impedance
Lightning Immunity:	Survives multiple 20KV 10mS surges
DC Measurement Accuracy:	+/- 0.5% of full-scale
AC Measurement Accuracy:	+/- 1.0% of full-scale
ADC Resolution:	16 bits
Temp. Measurement Accuracy:	+/-4 C (+/-7 F)
Door / Tamper Switch:	Activated by external magnet (included with device kit)
Interruption Output:
Relay drive voltage:	12 volts DC (Pwr In – 1VDC)
Relay drive current:	0.75 Amps maximum
Relay contact close dwell:	0-100 ms
Relay contact open dwell:	0-100 ms
Relay contact type:	NO or NC
Relay type:	Solid state or mechanical

RMU3-G GPS & LTE Cellular (Antenna Unit)

Environmental:
Operating temperature:	-40 to +70°C (-40 to +158°F)
Storage temperature:	-45 to +80°C (-49 to +176°F)
Humidity:	0 to 100% RH non-condensing
Pollution Degree:	2
Mounting:	Type 3 Enclosure - Suitable for outdoor use
Power:
Operating voltage range:	8.5VDC nominal, supplied from RMU3-B
Power:	4W maximum
Physical:
Size:	53mm x 77mm x 134mm (2.1” x 3.0” x 5.3”)
Weight:	550 grams (1.2lb)
Enclosure:	Watertight, UV stable, wide temperature polycarbonate
Backup Battery:	Internal 4V/2.8AHr extended temperature sealed lead acid
Communications:
Radio:	LTE Cellular
Interruption Timing:
GPS Receiver:	Internal 20 channel
GPS Antenna:	Internal patch
Timing accuracy:	+/-0.5 ms (AC line sync disabled) +8.8/-0.5 ms (AC line sync enabled)
Off Time:	100 – 60,000ms in 1ms steps
Cycle Time:	200 – 60,000ms in 1ms steps
Processing Core:
CPU:	72MHz ARM Cortex-M3 Core
Memory:	1MB Flash, 64KB RAM, 8KB EEPROM

RMU3-S GPS & Satellite (Antenna Unit)

Environmental:
Operating Temperature:	-40 to +70°C (-40 to +158°F)
Storage Temperature:	-45 to +80°C (-49 to +176°F)
Humidity:	0 to 100% RH non-condensing
Pollution Degree:	2
Mounting:	Type 3 Enclosure - Suitable for outdoor use
Power:
Operating voltage range:	8.5VDC nominal, supplied from RMU3-B
Power:	4W maximum
Physical:
Size:	53mm x 77mm x 134mm (2.1” x 3.0” x 5.3”)
Weight:	550 grams (1.2lb)
Enclosure:	Watertight, UV stable, wide temperature polycarbonate
Backup Battery:	Internal 4V/2.8AHr extended temperature sealed lead acid
Communications:
Radio:	Iridium SBD satellite
Interruption Timing:
GPS Receiver:	Internal 20 channel
GPS Antenna:	Internal patch
Timing accuracy:	+/-0.5 ms (AC line sync disabled) +8.8/-0.5 ms (AC line sync enabled)
Off Time:	100 – 60,000ms in 1ms steps
Cycle Time:	200 – 60,000ms in 1ms steps
Processing Core:
CPU:	72MHz ARM Cortex-M3 Core
Memory:	1MB Flash, 64KB RAM, 8KB EEPROM

Annotated Photos

RMU3

The number in the yellow circle corresponds to the numbered explanation on the following list:

Small weather proof antenna transceiver unit mounts externally with a view of the sky
Internal high gain GPS antenna & receiver and high gain GSM or satellite antenna & transceiver
Internal rechargeable battery backup system
Durable wide temperature cable with molded miniature waterproof connectors connects the two devices together
Magnetic door/tamper switch
Test switch and device status indicator
Terminal block assembly mounts inside of the rectifier
Exceptional lightning immunity provides long-term reliability
Four galvanically isolated analog input channels
Integral mounting system directly mates with industry standard ½" NPT electrical fittings
CSA USA & Canada regulatory safety approval