VCP RCO Series User manual

Carbon Monoxide (CO) Gas Detectors April 2020
Ventilation Control Products Sweden AB - Phone: [phone] - E-mail: [email protected] - Web: www.vcp.se
RCO-series
Features
• Ranges 0-100 ppm , 0-300 ppm and 0-1000 ppm
• Output
2 x 4-20 mA or 0-10 Vdc, user settable
• RS485, Modbus RTU protocol
• Power supply 24 Vdc (11-30 Vdc)
option with 24 Vac
• Electrochemical sensor
• Accuracy ± 5 ppm
• Response time 30 seconds
• IP65 protection for enclosure
• Microporous PTFE dust filter ensure
IP65 also for the sensor
• Sensor life time minimum 6 years
Ordering
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Type no. Description
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RCO 100 Carbon Monoxide (CO) gas detector
range 0-100 ppm
RCO 300 Carbon Monoxide (CO) gas detector
range 0-300 ppm
RCO 1000 Carbon Monoxide (CO) gas detector
range 0-1000 ppm
Options
LCD LCD display
24VAC Integrated 24 Vac power supply module
DM Duct mounting type
RSP3 Remote sensor probe, 3 meters cable
RSP10 Remote sensor probe , 10 meters cable
Ordering example
Carbon Monoxide (CO) detector with range 0-100 ppm and
with LCD display and
with integrated 24 Vac power supply module
is with type number RCO 100 LCD 24VAC.
Note
When the option Integrated 24 Vac power supply module
(24VAC) is supplied, the power supply can be 24 Vac or 24 Vdc
RCO 100 LCD
RCO 100
RCO 100 DM

Ventilation Control Products Sweden AB - Phone: [phone] - E-mail: [email protected] - Web: www.vcp.se
Technical data
Sensor type Electrochemical cell
Sampling method diffusion
Detection range 0-1000 ppm
RCO 100 is analog scaled 0-100 ppm
RCO 300 is analog scaled 0-300 ppm
Accuracy ± 5 ppm
Resolution 1 ppm CO
Signal update every 1 second
Response time ~30 seconds
Maintenance
interval 6 months
Sensor lifetime > 6 years
Self-diagnostics Full functionality check at start-up
Warm-up time ≤1 min
Power supply 11-30 Vdc
24 Vac as option
Power
consumption < 2 VA
Digital interface RS485, Modbus RTU protocol
Analog outputs 2 × 4-20 mA / 0-10 V, user settable
Enclosure Light-grey ABS plastic,
protection class IP65
Dimensions H82 × W80 × D55 mm
Operating
environment Industrial indoor and outdoor areas
without aggressive gases
Operating
conditions -20 to +50 °C, 15...95 %RH
non ATEX rated areas
NOTE The sensor may exhibit sensitivity to
acetylene, etylene, hydrogen and nitric oxide
LCD indicator option
Operating temperature 0 to +50 °C,
Display dimensions 72x36 mm
Number of digits 3.5 7-segment
Character height 14 mm
Other features Backlight
CE marking according to 2014/30/EU and
EN61326-1 requirements
Carbon Monoxide (CO) Gas Detectors RCO-series
Application
For detection of Carbon Monoxide (CO)
within a wide range of commercial applications such as:
Vehicle exhaust in parking structures
(e.g. underground garages)
Engine repair shops, Tunnels, loading bays,
Engine test benches, Shelters, Go-kart race courses , Etc.
April 2020

Carbon Monoxide (CO) Gas Detectors RCO-series
Ventilation Control Products Sweden AB - Phone: [phone] - E-mail: [email protected] - Web: www.vcp.se
April 2020
The detector have been calibrated by manufacturer with standard gas mixtures before delivery.
Provided that the sensor is used under moderate conditions, field recalibration is recommended every 6 months.
Maintenance
Do not perform any maintenance operation with the power on.
Clean the device with soft damp cloth.
Do not use any abrasive cleaning agents.
Do not immerse the device into water or any cleaning media.
Delivery set
- Detector (wall mount or duct mount version)
- Mounting accessories:
4 screws with plastic dowels for wall mount version rubber flange for duct mount version. fixing clamp for remote probe version
The detector are supplied either in duct-mount or wall-mount version.
The wall mount version of the device is available with remote probe.
The remote probe is connected to the main unit with shielded cable.
Default connection cable length is 3 m.
The detector provides two independent analog outputs OUT1 and OUT2,
user selectable to 4-20 mA or 0-10 Vdc, proportional either to gas concentration or temperature.
RS485 Modbus RTU digital communication interface allows easy instrument configuration and integration into various automation systems.
A design with LCD is available as an option.
Safety requirements
Always adhere to the safety provisions applicable in the country of use.
Do not perform any maintenance operation with the power on.
Do not let water or foreign objects inside the device.
Operating conditions
The device should be used in explosion-safe (non ATEX -rated) indoor areas,
Without aggressive gases in the atmosphere.
Installation and connections
There are no precise rules or standards to follow when installing the gas detectors.
The following points must be taken into account:
application (air quality control or leakage detection),
properties of the space under investigation (room geometry, direction and velocity of air flows etc),
detected gas (relative density to air, whether the gas is flammable, or toxiс, or oxygen displacing),
safety: strong vibrations, mechanical shock, and the sources of strong electromagnetic interference should be avoided,
the device should be accessible for maintenance and repair.
For early leakage detection install the sensor as close as possible to the potential leakage sources
(flanges, valves, pressure reducers, pumps, etc), taking into consideration other points listed above.
For general area monitoring without definite leakage sources, the detectors should be distributed evenly in the room.
For personal safety control the detectors are installed in the breathing zone (at the height of the head of people or animals).
Recommended sensor position is vertical, pointing downwards.
See Installation guidelines section on the next page for more information.

Carbon Monoxide (CO) Gas Detectors RCO-series
Ventilation Control Products Sweden AB - Phone: [phone] - E-mail: [email protected] - Web: www.vcp.se
April 2020
Wall mount version:
Fix the device on a wall by screws, using cross-shaped mounting lugs supplied with the instrument
(see dimensional drawing below).
Duct mount version:
Cut hole with a diameter of 36-45 mm in the air duct at the chosen mounting place.
Place the rubber flange aligning the holes in the flange and the air-duct and fix the flange with four self-tapping screws.
Pass the sensor probe through the flange and adjust it to the appropriate depth.
Unscrew four lid screws and detach the lid from the transmitter.
Use two M16 cable glands to pass the cables of the power supply and of the external devices.
Plug the power cable and connect the analog outputs and/or digital interface terminals to the relevant devices according
to the connection diagram.
The screw less quick connect spring terminals on the Detector devices are
suitable for a wide range of wires with cross-section 0,2...1,5 mm2.
We recommend to strip the wire end by 8...9 mm and tin it, or to use the wire end sleeves.
To connect the wire, insert the wire end into terminal hole.
To disconnect, push the spring loaded terminal lever, pull the wire out, and release the lever.
Use twisted pair cable, e.g. LiYY TP 2×2×0,5 mm2 or CAT 5, to connect the device to RS485 network.
Use one pair for A and B wires and the second pair for common 0 V and power +U wires to connect the transmitter to Fieldbus network.
Respect polarity.
Overall length of all connections via RS485 interface should not exceed 1200 m.
The type of each analog output can be independently changed between 4- 20 mA and 0-10 Vdc with jumpers J1 (OUT1) and J2 (OUT2).
With closed jumper the output is 0-10 V, with open jumper the output is 4-20 mA.
By default both outputs OUT1 and OUT2 are assigned to gas concentration.
The device has built-in temperature sensor which may be tied to any of the outputs.
The output assignments and scales can be changed by Modbus commands.
NOTE If you use a version with LCD, only OUT1 is available.
Turn on the power.
The sensor heating up may take up to five minutes after switching on.
During this period relays, analog outputs and Modbus interface are off.
A LED placed on the PCB of the device allows to control the connection process.
The LED response to different processes is presented in the table below.
Make sure that the transmitter is properly fixed, the external devices connected, power on and control LED is constantly lit.
Place the lid back and fix it with the screws.
The device is ready to use.
It is recommended to keep the device on constantly, except for periods of maintenance and calibration, replacement etc.

Carbon Monoxide (CO) Gas Detectors RCO-series
Ventilation Control Products Sweden AB - Phone: [phone] - E-mail: [email protected] - Web: www.vcp.se
April 2020
Sensor probe handling
The wall mount version of the Detector is available with remote probe
The remote probe is connected to the main unit with shielded cable.
Default connection cable length is 3 m.
The sensor probes of all types are equipped with a hydrophobic microporous PTFE filter
to protect the sensor from dust, dirt and water drops.
The filter may be replaced if it gets strongly contaminated.
To replace the PTFE filter, unscrew the M25 nut and remove the old filter.
Place a new filter into the nut and tighten it again.
Dimensions remote sensor probe (option)
Note:
Protection IP65, shielded cable default cable lenght 3.0 m.
NB! Never stab or press the filter near its centre where the sensor is located since this may damage the sensor.
The recommended orientation of sensor probe is vertical with the sensor tip pointing downwards.
This prevents possible accumulation of condensed water on the sensor protection filter.
The horizontal orientation is also suitable.
Avoid upward position of the sensor tip.

Configuring
The Detector features and options include:
- digital output change rate limiting filter
- digital integrating (averaging) filter
- temperature measurement channel with internal sensor
- free assignment of each analog output to chosen parameter
- flexible setting of analog output scales for each output
- output shift and slope adjustment for calibration
- Modbus controlled forced state option for analog outputs .
The detector can be configured through its RS485 interface by Modbus RTU commands.
A standard configuration kit includes Model E1087 USB-EIA485 converter and a software pack.
Please contact your Seller for more information.
Return to default settings
To reset the device’s Slave ID, baudrate and sbit number to factory settings, proceed as follows:
1. De-energize the device
2. Connect the J3 jumper
3. Turn on the device
4. De-energize the device
5. Disconnect the J3 jumper
6. Turn on the device
RS485 communication interface
See next pages
Ventilation Control Products Sweden AB - Phone: [phone] - E-mail: [email protected] - Web: www.vcp.se
Carbon Monoxide (CO) Gas Detectors RCO-series April 2020

Carbon Monoxide (CO) Gas Detectors RCO-series
Ventilation Control Products Sweden AB - Phone: [phone] - E-mail: [email protected] - Web: www.vcp.se
April 2020
Electrical connection
Note:
For LCD version only OUT1 is available

Carbon Monoxide (CO) Gas Detectors RCO-series
Ventilation Control Products Sweden AB - Phone: [phone] - E-mail: [email protected] - Web: www.vcp.se
We reserve the right to make changes in our products without any notice which may effect the accuracy of the information contained in this leaflet.
Dimensions in mm
Duct mount version
April 2020

Carbon Monoxide (CO) Gas Detectors RCO-series
Ventilation Control Products Sweden AB - Phone: [phone] - E-mail: [email protected] - Web: www.vcp.se
April 2020
Modbus RTU Communication Reference
* - The new value is applied after restart.
** - Broadcast slave ID 0 can be used to assign a new ID to device with unknown ID.
When addressing by ID 0 the device shall be the only Modbus instrument in the network.
The device will not respond to Master command when addressed by ID 0.
*** - This value is dynamic and not kept in EEPROM after restart

Carbon Monoxide (CO) Gas Detectors RCO-series
Ventilation Control Products Sweden AB - Phone: [phone] - E-mail: [email protected] - Web: www.vcp.se
We reserve the right to make changes in our products without any notice which may effect the accuracy of the information contained in this leaflet.
April 2020
Modbus holding registers (part 2)
Register addresses are shown 0-based, Addr in hexadecimal, Reg in decimal format.
Modbus holding register numbers MHR are shown in decimal 1-based format, and may be addressed either from 00001 or 40001 base.
*- The new value is applied after restart.
** - Broadcast slave ID 0 can be used to assign a new ID to device with unknown ID. When addressing by ID 0 the device shall be the
only Modbus instrument in the network. The device will not respond to Master command when addressed by ID 0.
*** - This value is dynamic and not kept in EEPROM after restart