Evikon E2618-CO User Manual

Сarbon monoxide transmitter E2618-CO is a member of new PluraSens® family of
multifunctional measurement instruments. Applications include underground
parkings, boiler houses, kitchens, and other confined spaces, where potentially
toxic concentration of carbon monoxide can accumulate.
The instrument utilises digital fully calibrated and temperature compensated
electrochemical gas sensor with excellent repeatability, stability and long lifetime.
The transmitter is supplied either in duct-mount or wall-mount version. For the wall-
mount version the range of remote probe options is available.
Two freely configurable 4-20 mA or 0-10 V analog outputs can be used to connect
the transmitter to secondary instruments. RS485 interface with industry-standard
Modbus RTU protocol allows direct Fieldbus networking of the transmitter.

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. Allowed conditions are:
– temperature in the range of -40...+85 °C
– relative humidity in the range of 0...100%
– atmospheric pressure in the range of 80...120 kPa.

Installation and connection

1. Duct mount version: Connect the sensor probe to the device main unit. Make
sure that the connections are tightened properly.
Cut a 25 mm diameter hole in the air duct at the chosen mounting place. Fix the 25
mm cable gland in the hole. Pass the sensor probe through the gland, adjust it to
the appropriate depth and tighten the gland's screw. Unscrew four lid screws and
detach the lid from the instrument.
Wall mount version: Unscrew four lid screws and detach the lid from the
instrument. Fix the transmitter through mounting holes by screws.
The device should be mounted in the breathing zone (ca. 1,5 m from the floor) in
proximity to potential carbon monoxide sources and away from ventilation holes or
dead-air spaces such as corners. Recommended coverage area for each
transmitter is 500...1000 m 2 (12...18 m radius).
2. Plug the power cable and connect the analog outputs and/or digital interface
terminals to the relevant devices according to the connection diagram.
Make certain that the cable gland is properly tightened to ensure the conformity to
IP65 protection class.
The screwless quick connect spring terminals on the E2618 series devices are
suitable for a wide range of wires with cross-section 0,2...1,5 mm
recommended wire stripping length is 8...9 mm. Push the spring loaded terminal
lever, insert the wire end into terminal hole and release the lever.
Use twisted pair cable, e.g. LiYY TP 2×2×0,5 mm 2 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.
Place the lid back and tighten it with the four screws.
Dimensions of the E2618 wall-mount version
55
Dimensions of the E2618 duct mount version
2 . The
Ø16
The type of each analog output can be independently changed between 4-20 mA
and 0-10 V 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.
80
By default both outputs OUT1 and OUT2 are assigned to gas concentration with
the scale 0-1000 ppm of carbon monoxide. The device has built-in temperature
sensor wich may be connected to any of the outputs.
The output assignments and scales can be changed by Modbus commands.

Sensor probe handling

Controller
Ø4 mm
Power Supply
50
80 The wall mount version of the transmitter is available with remote probe (see
drawing for dimentions).
M16
The remote probe is connected to the main unit with shielded cable. The
connection cable length options are 2,5 m or 5 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 round filter is
snap-fitted and may be replaced if it gets strongly contaminated.
To replace the PTFE filter, carefully hook the filter near it's edge with a small flat
screwdriver and pull it off. Place a new filter onto the sensor opening and press it
to snap into the groove.
NB! Never stab or press the filter near its center where the sensor is located sinse
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.

Emergency mode

The current outputs of the transmitter may be programmed via Modbus commands
to signal if the connection with the sensor is lost. The signal may be set to 3,8 mA
or 21,5 mA. See the table of Modbus registers for more information.
J3
Input 1 4-20 mA / 0-10 V
OUT1
Input 2 4-20 mA / 0-10 V
OUT2
0V / GND
0V
A
Fieldbus
0V RS485
B
+12 V
+U
Sensor module
J1 J2
36
Ø34 max
120°
Ø35...36
Hole
Ø50