Azbil mF CMG Series User manual

CMG Series
Gas Flow Monitor
User's Manual
No. CP-SP-1113E
TM
Thank you for purchasing the CMG
Series Gas Flow Monitor.
This manual contains information for
ensuring the correct use of the CMG
Series. It also provides necessary infor-
mation for installation, maintenance,
and troubleshooting.
This manual should be read by those
who design and maintain equipment
that uses the CMG Series. Be sure to
keep this manual nearby for handy ref-
erence.

The µFTM, CMGTM are trademarks of Azbil Corporation in Japan.
NOTICE
©2001-2012 Azbil Corporation All Rights Reserved.
Be sure that the user receives this manual before the product is used.
Copying or duplicating this user’s manual in part or in whole is forbid-
den. The information and specifications in this manual are subject to
change without notice.
Considerable effort has been made to ensure that this manual is free
from inaccuracies and omissions. If you should find an error or omis-
sion, please contact Azbil Corporation.
In no event is Azbil Corporation liable to anyone for any indirect, special
or consequential damages as a result of using this product.
Please read the "Terms and Conditions" from the following URL before
ordering or use:
http://www.azbil.com/products/bi/order.html

i
■About Icons
The safety precautions described in this manual are indicated by various icons.
Please be sure you read and understand the icons and their meanings described
below before reading the rest of the manual.
Safety precautions are intended to ensure the safe and correct use of this prod-
uct, to prevent injury to the operator and others, and to prevent damage to proper-
ty. Be sure to observe these safety precautions.
■Examples
Use caution when handling the product.
The indicated action is prohibited.
Be sure to follow the indicated instructions.
SAFETY PRECAUTIONS
WARNING Warnings are indicated when mishandling this product might result in death or serious injury.
CAUTION Cautions are indicated when mishandling this product might result in minor injury to the user, or
only physical damage to the product.

ii
WARNING
CAUTION
Be sure to use this product within the flowrate range stated in the
specifications. To prevent excessive flow, use a suitable means to control the
supply pressure or use a throttle valve or the like to control the flowrate. If the
flowrate exceeds the upper limit, both the flowrate display and the output
voltage/current may indicate considerably lower values than the actual
flowrate.
If damage could result from the abnormal functioning of this device, include
appropriate redundancy in the system design.
This device is a precision instrument. Do not drop it nor subject it to shock.
Doing so might damage the device.
Do not peel off the pipe connection port seals until immediately before you
connect the piping. Doing so might allow foreign objects to enter the
connector port and cause defective operation.
If pipes may contain rust, welding fumes, slag, water droplets, oil mist or dust,
install a filter upstream to prevent foreign matter from entering the device.
Foreign matter may cause faulty operation.
When wiring, take care not to tug on the display. The components inside
might become damaged.
When replacing a fuse, be sure the replacement fuse has the correct
amperage rating. Use of a fuse with the wrong rating will prevent the safety
circuit from functioning properly.
When using combustible gas, install the device upstream of the safety
shut off valve. If air somehow enters the piping, and the sensor makes a spark
due to some cause like a lightning strike when an explosive mixture is
present, an explosion could occur inside the pipe.
On flanged models, do not use the device or installed pipes as a footrest.
Doing so might damage the device or piping, or cause a slip which might
result in injury.
Flanged models are heavy. Dropping them on your feet may cause injury.
The device is intended for use with city gas 13A, air, propane, and butane.
Do not use the device for other types of gases. Use of the gases having an
ignition temperature lower than 365°C may cause an internal pipe explosion.
A heater incorporated in a sensor could act as an ignition source if air has
entered the piping and explosive mixed gas is produced.
Use the analog outputs and alarm contact outputs on the device for
monitoring the gas flow rate of a burner or other equipment. Do not use these
outputs in applications where safety will be impaired when an analog output
abnormality or alarm contact output malfunction occurs.
Before removing, mounting, or wiring the CMG, be sure to turn off the power
to the CMG and all connected devices. Failure to do so might cause electric
shock.

iii
Be sure to check that the wiring is correct before you turn the power ON.
Incorrect wiring may cause damage or malfunction.
Connect the power supply last. Otherwise touching terminals by mistake may
cause electric shock or damage the device.
Make sure that the load to be connected to terminals does not exceed the
rating indicated in the specifications.
Supply power at the voltage indicated on the model number label on the
device.
Take the necessary countermeasures with the instrumentation to prevent the
occurrence of backfire and to avoid any influence to the device even if
backfiring occurs. Pressure increase in the piping or fire caused by backfire of
the burner could damage the device.
When disposing of the device, observe local regulations.
CAUTION
The following conventions are used in this manual:
Handling Precautions:
Handling Precautions indicate items that the user should pay attention to
when handling the CMG Series.
Note:Notes indicate information that might benefit the user.
(1), (2), (3): Numbers in parentheses indicate steps in a sequence or parts of an expla-
nation.
Conventions Used in This Manual

iv
Contents
SAFETY PRECAUTIONS
Conventions Used in This Manual
Chapter 1. INTRODUCTION
■Introduction••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••1
■Features •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••1
■Model selection guide••••••••••••••••••••••••••••••••••••••••••••••••••••2
Chapter 2. NAMES AND FUNCTIONS OF PARTS
Chapter 3. MOUNTING AND WIRING
■Mounting•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••6
■Behavior when the flowrate greatly exceeds the upper limit of
flowrate range••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••7
■Pipes•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••8
■Wiring•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••13
Chapter 4. OPERATION
■Displaying the flow rate•••••••••••••••••••••••••••••••••••••••••••••••••16
■Resetting alarms••••••••••••••••••••••••••••••••••••••••••••••••••••••••17
■Resetting the integrated flow rate ••••••••••••••••••••••••••••••••••••••17
■Displaying the total flow rate •••••••••••••••••••••••••••••••••••••••••••18
Chapter 5. APPLICATION OPERATION
5-1 Function Setup •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••19
■Setting operation •••••••••••••••••••••••••••••••••••••••••••••••••••••••19
■Function setup item list•••••••••••••••••••••••••••••••••••••••••••••••••20
5-2 Parameter Setup••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••21
■Setting operation •••••••••••••••••••••••••••••••••••••••••••••••••••••••21
■Parameter setup item list •••••••••••••••••••••••••••••••••••••••••••••••22
Chapter 6. MAINTENANCE AND TROUBLESHOOTING
■Remedying trouble •••••••••••••••••••••••••••••••••••••••••••••••••••••24
■How to replace the fuse•••••••••••••••••••••••••••••••••••••••••••••••••25
Chapter 7. SPECIFICATIONS
■CMG Series specifications••••••••••••••••••••••••••••••••••••••••••••••26
■Individual CMG model specifications •••••••••••••••••••••••••••••••••••27
■Pressure loss •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••29
■External dimensions ••••••••••••••••••••••••••••••••••••••••••••••••••••31

Chapter 1. INTRODUCTION
■Introduction
The CMG Gas Flow Monitor is a flowmeter for measuring the fuel flow rate of
gas burners. It uses the Micro Flow sensor chip, a thermal mass flow sensor made
using Azbil Corporation proprietary technology.
The CMG measures and displays the instantaneous and integrated flow rate in
normal standard state* without the need for temperature and pressure conversion.
Other functions include alarm contact output, analog output of instantaneous flow
rate, and open collector output of totalizer pulse or event output.
These functions enable fine-grained air-fuel ratio management of individual
burners and flow rate management of combustion equipment.
*Factory setting is 0˚C, 101.325kPa (1 atmosphere). (The reference temperature
can be selected from 5˚C, 10˚C, 15˚C, 20˚C and 25˚C according to the function
settings.)
■Features
• Installation of the compact and high-precision CMG is simple. It can be
mounted in any direction, as the direction of the display can be changed.
• Gas flow rate can be measured and managed easily on the digital flow rate
display and Hi, Lo, OVER and ALARM LED displays.
• Output of the gas flow rate upper/lower limit settings and analog output of
instantaneous flow rate are convenient for panel display or flow rate
management purposes.
• Fuel usage can be easily understood because the instantaneous flow rate and
integrated flow rate displays can be switched by one-touch operation.
The total flow rate since this device was installed can be displayed.
• Compensation of display values is not needed even if temperature and pressure
change as the measurement method used is mass flow.
• A bypass structure using an orifice enables low pressure loss, and prevents the
influence of mist, etc.
• Self-diagnostic functions simplify remedies during troubleshooting.
1

Basic I II III IV V VI VII VII IX Description
model Pipe Pipe Gas Flow Output Pressure Commu- Power Additional
No. size shape type range nication supply processing
CMG Gas flow monitor
15 15A (1/2B)
25 25A (1B)
40 40A (1 1/2B)
50 50A (2B)
0Rc thread
1JIS 10K flange (40A, 50A only)
AAir
004 4m3/h (normal) (CMG15) *1
010 10m3/h (normal) (CMG25) *1
030 30m3/h (normal) (CMG25) *1
080 80m3/h (normal) (CMG40, 50) *1
150 150m3/h (normal) (CMG40, 50) *1
01to 5V output (4, 10, 30m3/h only) *3
14to 20mA + event output 2
0Low pressure (Rc screw only) *2
1 Medium pressure (CMG25,40,50 of Rc screw)
Medium pressure (CMG40,80 of JIS 10K flange) *2
0Not available
024Vdc
1100Vac (50/60Hz)
2200Vac (50/60Hz)
00 None
D0 Inspection certificate provided
Y0 Traceability certificate provided
●Natural gas (13A-46MJ/m3) model (LNG CH4:88%) *4
■Model selection guide
Model selection guide CMG IIIIII IV V VI VII VIII IX
●Air model
Chapter 1. INTRODUCTION
Basic I II III IV V VI VII VII IX Description
model Pipe Pipe Gas Flow Output Pressure Commu- Power Additional
No. size shape type range nication supply processing
CMG Gas flow monitor
15 15A (1/2B)
25 25A (1B)
40 40A (1 1/2B)
50 50A (2B)
0Rc thread
1JIS 10K flange (40A, 50A only)
NNatural gas 13A
004 4m3/h (normal) (CMG15) *1
010 10m3/h (normal) (CMG25) *1
030 30m3/h (normal) (CMG25) *1
080 80m3/h (normal) (CMG40, 50) *1
150 150m3/h (normal) (CMG40, 50) *1
0 1 to 5V output (4, 10, 30m
3
/h (norm.) only) *3
14to 20mA + event output 2
0Low pressure (Rc screw only) *2
1 Medium pressure (JIS 10K flange only) *2
0Not available
024Vdc
1100Vac (50/60Hz)
2200Vac (50/60Hz)
00 None
D0 Inspection certificate provided
Y0 Traceability certificate provided
2

Chapter 1. INTRODUCTION
●Propane model
●Butane model
*1 "Normal" refers to the volumetric flow rate (m3/h) after converting to 0˚C, 101.325kPa (1 atmosphere).
*2 For the selection of a medium pressure model, refer to "When selecting a medium pressure model for
air and natural gas (13A-46MJ/m3)" on page 28.
*3 1 to 5 V output models have event output 1 (relay) but not event output 2 (open collector). For use of an
integration pulse, select a 4 to 20 mA model.
*4 For natural gas composition, refer to page 27. When using natural gas with a different composition,
contact the azbil Group.
Basic I II III IV V VI VII VII IX Description
model Pipe Pipe Gas Flow Output Pressure Commu- Power Additional
No. size shape type range nication supply processing
CMG Gas flow monitor
15 15A (1/2B)
25 25A (1B)
40 40A (1 1/2B)
50 50A (2B)
0Rc thread
PPropane
002 2m3/h (normal) (CMG15) *1
004 4m3/h (normal) (CMG25) *1
010 10m3/h (normal) (CMG25) *1
025 25m3/h (normal) (CMG40, 50) *1
050 50m3/h (normal) (CMG40, 50) *1
01 to 5V output (2, 4, 10m3/h(normal) only)*3
14to 20mA + event output 2
0Low pressure *2
0Not available
024Vdc
1100Vac (50/60Hz)
2200Vac (50/60Hz)
00 None
D0 Inspection certificate provided
Y0 Traceability certificate provided
Basic I II III IV V VI VII VII IX Description
model Pipe Pipe Gas Flow Output
Pressure Commu- Power Additional
No. size shape type range nication supply processing
CMG Gas flow monitor
15 15A (1/2B)
25 25A (1 B)
40 40A (1 1/2B)
50 50A (2 B)
0Rc thread
BButane (butane 75%, propane 25%)
001 1m3/h (normal) (CMG15) *1
003 3m3/h (normal) (CMG25) *1
008 8m3/h (normal) (CMG25) *1
020 20m3/h (normal) (CMG40, 50) *1
040 40m3/h (normal) (CMG40, 50) *1
01 to 5V output (1, 3, 8m3/h(norm.) only) *3
14to 20mA + event output 2
0Low pressure *2
0Not available
024Vdc
1100Vac (50/60Hz)
2200Vac (50/60Hz)
00 None
D0 Inspection certificate provided
Y0 Traceability certificate provided
3

Chapter 2. NAMES AND FUNCTIONS OF PARTS
4
24Vdc power supply model AC power supply model
Fuse M3.5 (6) terminal screws Fuse M3.5 (4) terminal screws
M3.5 (3) terminal screws
EVENT2 4
ENT
DISP
CMG
Hi
ALARM
mm / h
33
OVER Lo
RESET
/ ALARM
Wiring hole:
There are two wiring holes.
Insert the plug and seal packing
(provided) in the unused hole
Operation panel cover:
Open this cover to configure or reset
various settings.
key:
Use this key to increment a value.
key:
Use this key to decrement a value.
Also use it to switch to the function
setup mode.
key:
Use this key to feed digits when changing setting
values. Also use it to move to the parameter
setup mode.
RESET key:
Use this key to reset alarms/integrated flow rate.
Outlet:
This is where the fluid
to be measured flows out.
OVER indicator:
Lights when the flow rate exceeds the
measurement range. Blinks when
the integration event occurs.
Alarm indicator:
Blinks when an alarm occurs.
Hi indicator:
Blinks when the upper limit alarm occurs.
Lo indicator:
Blinks when the lower limit alarm occurs.
Display:
Displays the instantaneous flow rate value,
integrated flow rate value, total flow rate
value, function setting values and parameter
setting values on a in 7-segment LED
display.
DISP key:
Use this key to switch between
instantaneous flow rate display and
integrated flow rate display, and from
setup mode to instantaneous flow rate
display.
3
m indicator:
Lights during integrated flow rate display.
Goes out during total flow rate display.
Blinks once at each pulse output.
m /h indicator:
Lights during instantaneous flow rate
display.
3
ENT key:
Use this key to fix and store settings to
memory. Also use it to display total
flow rate, or to switch to the function
setup mode.
Sensor/terminal section:
Houses the Micro Flow sensor chip
amplifier and wiring terminal plates.
Inlet:
This is where the fluid to be measured
flows in.
Flow path:
The fluid to be measured flows through
the flow rate.
Operation panel:
Use this panel to set functions,
parameters, alarms or alarm occurrence
wait time, and to reset alarms or reset
the integrated flow rate.
Fuse position

Chapter 3. MOUNTING AND WIRING
Handling Precautions
•When carrying the device, hold it by the flow path section. Holding it by
the sensor/terminal section may damage the device.
•This device is a precision instrument. Do not drop it or subject it to
shock. Doing so might damage the device.
•If the CMG model has a threaded pipe connection, when connecting the
piping fasten the flow inlet/outlet section, and then screw in the pipe side
to connect the piping.
•When connecting a flanged device, first check that the piping is not tilted
or off center before installing. Failure to do so might cause leakage.
•To prevent vibration of the device, attach the pipe securely.
•Do not peel the protective seals from the display before use. When
performing work on the device, tools may accidentally bump against the
display and scratch it.
•When using the device outdoors, mount it out of the direct sunlight and
in a location where it is not splashed directly by rain.
•If the piping may contain rust, oil mist, dust, or powder, be sure to
provide a strainer or filter upstream to prevent foreign matter from
entering the device. Foreign matter flowing into the device might result
in faulty operation.
•When wiring the device, take care not to tug on the display. The internal
connections might become damaged.
•Wire 1-5V output, 4-20mA output, open collector output, and
communications separately from the power line and power supply leads.
Do not wire these outputs in the same conduit as the power line and
power supply leads. Doing so might cause malfunction.
•Install a switch for shutting off the main power to the device within reach
of the person operating the device.
•The common mode voltage between output and ground should be less
than 33V RMS, 46.7V at peak or 70Vdc, excluding power supply and
relay contact output.
5
WARNING
When using combustible gas, install the device upstream of the safety
shut off valve. If air somehow enters the piping, and the sensor makes a
spark due to some cause like a lightning strike when an explosive mixture is
present, an explosion could occur inside the pipe.
On flanged models, do not use the device or installed pipes as a footrest.
Doing so might damage the device or piping, or cause a slip which might
result in injury.
Flanged models are heavy. Dropping them on your feet may cause injury.

6
■Mounting
●Installation site
Avoid mounting the CMG in locations characterized by the following:
1. Operating temperatures that fall below -10˚C and rise above 60˚C
2. Operating humidity that exceeds 90%RH
3. Sudden changes in temperature and condensation
4. Corrosive gases and flammable gases
5. Abundant conductive substances (e.g., dust, salt or iron dust) or organic
solvents
6. Vibration or shock
7. Direct sunlight
8. Direct splashing by rain or water
9. Splashing by fluids (e.g., oil, chemicals)
10. Where it is near the electrical noise source.
11. Strong magnetic or electrical fields
12. Where there is a pulsating flow.
1) One cause is flexible piping (regardless of the material) with an accordion-
shape inner surface and a length of 500mm or more. Flexible piping (such as a
rubber hose) with a flat inner surface does not cause pulsation.
2) Another cause is a reciprocating or rotary type gas booster or a flow meter
having rotary motion like a Roots meter.
13. Where soot or moisture generation in the piping is expected due to fluctuation
in gas composition, etc.
●Gas flow
Handling Precautions
Make sure that the gas flows into the device in the direction indicated
by the FLOW arrow on the side of the flow path.
Otherwise, the flow rate cannot be measured correctly.
Gas Gas
Chapter 3. MOUNTING AND WIRING

7
■Behavior when the flowrate greatly exceeds the upper limit of flowrate range
When the flowrate exceeds the upper limit of flowrate range, both the flowrate
display and the output voltage/current may indicate lower values than the actual
flowrate. Be sure to use this product within the flowrate range stated in the
specifications.
If the actual flowrate exceeds 120 % of the upper limit, both the flowrate display
and the output voltage/current will stop increasing in proportion to the flowrate.
If the flowrate is more than 200 % of the upper limit, both the flowrate display and
the output voltage/current will begin to decrease, giving the appearance that the
flowrate is within the flowrate range limits.
Also, if there is a sudden greatly excessive flowrate (200% of the upper limit or
more) for a very short period, the flowrate display and the output voltage/current
will continue to indicate flow within the flowrate range, without indicating the
spike.
Especially when this device is used for flow control, make sure to take appropriate
measures, such as controlling the supply pressure or using a throttle valve, so that
even at maximum control output, the flowrate does not exceed 120% of the upper
limit.
Actual flowrate
Flowrate display
and
output voltage/current
Flowrate range
100%
Upper limit
200%
120%
Chapter 3. MOUNTING AND WIRING

8
■Pipes
●Precautions for piping installation
This device is a precision instrument. If foreign matter such as dust, oil mist or
water enters the device, it may cause measurement error or faulty operation. When
installing piping, be sure to follow the procedures below to prevent foreign matter
from entering the device.
1. Before installing the device, be
sure to flush the upstream and
downstream piping thoroughly
to remove welding fume
particulate and dust.
2. Be sure to wipe the inside
of the pipe to be directly connected to this device.
3. After the above two operations are complete, check to be sure that there is no
welding fume particulate or dust, and then install the device.
Handling Precautions
If foreign matter cannot be fully
eliminated by flushing or wiping, or if the
regular presence of foreign matter can be
expected, be sure to install a filter. If
dust, oil or moisture adheres to the Micro
Flow sensor chip, measurement error or
faulty operation may result.
●Filter installation
For applications with propane or butane gas, which regularly
contain oil mist, or applications where rust in the piping is
expected, be sure to install a filter. Recommended type:
Name: Mist separator
Model No.: MFF100 series
Specifications: For details, refer to;
Azbil Corporation's Specification seat
(Japanese) CP-SS-1824.
●Straight pipe section
To be sure the straight pipe section is long enough, refer to pages 27-28.
Chapter 3. MOUNTING AND WIRING
  
   



 
 

9
Chapter 3. MOUNTING AND WIRING
●Mounting position
Handling Precautions
The length of the required straight pipe connection varies according to
the model number. For details,
see ■Individual specifications (page 27).
●Screw connection
●Coating sealant
Coat with an appropriate amount of sealant. Do not coat the top two threads of
the screw.
Remove any dirt, burrs or piping cutting oil from inside the pipes.
Handling Precautions
Do not overdo the sealant, and do not allow dirt, burrs or piping cutting
oil to enter the pipes, as this might cause measurement error.
Good example Bad example
Sealant
Sealant
Right WrongRight
Right
CAUTION
• Do not mount so that the display is facing down. Doing so might cause error
or other malfunction.
• This device can be used with the display facing up ±90°.

10
●Connecting pipes
Connect pipes while gripping the hexagonal section of the pipe connection port
on the body with a wrench.
Handling Precautions
•Do not grip the display or sensor/terminal section. Doing so might
damage the body or cause leakage.
•Do not tighten the pipe at a torque that exceeds the maximum
tightening torque.
● Flange connection
●Gasket
A gasket is required for connecting the flange.
The following table shows the internal diameters dimensions of the gaskets:
Handling Precautions
•If the gasket inner diameter is too small, the flow speed distribution
may be disturbed and adversely influence accuracy.
•If the gasket inner diameter is too large, leakage may occur.
•Align the inner diameters of the piping and the flowmeter, and attach
so that the gasket does not protrude into the inside of the piping. If it
does, leakage might result.
Pipe
Pipe connection port
Chapter 3. MOUNTING AND WIRING
Model No. Max. Tightening Torque
CMG150 50N•m
CMG250 125N•m
CMG400 200N•m
CMG500 250N•m
Pipe Size (mm) Internal diameters (mm)
40 49
50 61

11
●Flange Shape
Use a flange that ensures a large contact area with the gasket.
●Mounting
The figure below shows how to actually mount the flowmeter. Before installing
the flowmeter, be sure to flush the piping to remove any foreign objects inside.
Handling Precautions
Do not flush the piping with the flowmeter attached. Doing so might
cause foreign objects to enter the flowmeter and cause error.
Pipe
Thru bolt
Nut
Gasket
Good example Bad example
Flange
Welded part
Pipe
Welded part
(Leakage may
occur since the
gasket contacting
part is small.)
Chapter 3. MOUNTING AND WIRING

12
Tighten according to the torque in the following table:
Handling Precautions
•Tighten bolts so that they are uniformly tight. If leakage does not stop
after tightening bolts, gradually tighten the bolts more a little at a
time.
•Tighten bolts within the specified tightening torque. Otherwise, the
bolts may be damaged.
•Do not mount as shown in the following figure. Doing so might cause
leakage.
•Do not exert unnecessary force on the narrow section between
flange surfaces. Doing so might damage the device.
ALARM
DISP
Hi
.
Lo m3m3/h OVER
CMG GasFlow Monitor
. .
Off center
Off center
Tilted piping
Chapter 3. MOUNTING AND WIRING
Aperture/Flange Rating Torque (N•m)
40mm JIS10K 22 to 32
50mm JIS10K 24 to 34

13
■Wiring
The following table describes the meaning of symbols indicated on the terminal layout label on the CMG:
●Removing the operation panel/display
Required tool: Phillips screwdriver
(1) Loosen the four screws on the operation panel/display using the Phillips
screwdriver.
(2) Gently lift up the operation panel/display, and disconnect its power lead
connectors.
●Wiring the 24Vdc power supply model
The following shows wiring of the 24Vdc power supply model and connection
names:
Load
Load
1 to 5V or 4 to 20mA output
Open collector output
+
-
Internal circuit CN1
Te r minal 2: COM
Te r minal 1: 24Vdc
Te r minal 3: OUTPUT
(+)
Te r minal 4: EVENT2
Te r minal 5: RELAY
Te r minal 6: RELAY Relay output
**: A DC power supply can also be
used for the load that is wired to
terminals 5 and 6.
(4 to 20mA output model only)
Symbol Meaning
Direct current
Chapter 3. MOUNTING AND WIRING
CAUTION
Prevent the load connected to the output terminal from exceeding the rating
indicated in the specifications. Failure to do so might cause damage.
Be sure to check that the wiring is correct before you turn the power ON.
Incorrect wiring might cause damage or malfunction.
Terminal No. Connection Name Description
124Vdc Power supply
2COM Common
3OUTPUT Analog output (+)
4EVENT2 Event output 2 NPN open collector, integrated pulse
5RELAY Event output 1 contact output (relay output)
6RELAY Event output 1 contact output (relay output)

14
● Wiring the AC power supply model
The following shows wiring of the AC power supply model and connection
names:
Handling Precautions
•Use crimped terminal lugs, which enable a reliable connection to
terminals.
•Use crimped terminal lugs that are compatible with M3.5 screws.
•Limit the terminal screw tightening torque to 0.8N•m.
•Use a JIS C 3401 control cable (CVV, etc.) of maximum outer diameter
of 2.2mm for wiring.
•If waterproofing is required, be sure to use the seal connector (Azbil
Corporation model: PA4-N2, PA4-N4 or equivalent product) for reliable
sealing.
•When wiring to terminal 2 (COM) on a 24Vdc power supply type, wire
the analog output lead separately from the power lead. Otherwise, a
voltage drop caused by the power current may influence the accuracy of
the analog output.
•Take care that event output 2 (the open collector output) does not
exceed the output rating of this device. When driving a relay, be sure to
use one with a built-in coil surge absorption diode. Failure to do so might
cause faulty operation.
CN1
CN200
Te r minal 5: COM
Te r minal 3: RELAY
Te r minal 2: AC
Te r minal 6: OUT
(+)
Te r minal 7: EVENT2
Load
Load
Te r minal 1: AC
Te r minal 4: RELAY
1 to 5V or 4 to 20mA output
Open collector output
Relay output
Internal circuit
100Vac or 200Vac
**: A DC power supply can also be
used for the load that is wired to
terminals 3 and 4.
(4 to 20mA output model only)
Chapter 3. MOUNTING AND WIRING
Terminal No. Connection Name Description
1AC Power supply
2AC Power supply
3RELAY Event output 1 contact output (relay output)
4RELAY Event output 1 contact output (relay output)
5COM Common
6OUT Analog output (+)
7EVENT2 Event output 2 NPN open collector, integrated pulse