Installation & Maintenance Manual
SI unit - CC-Link compatible
Type EX250-SMJ2
The unit and this manual contain essential information to protect
users and others from possible injury and property damage and to
ensure correct handling.
Please confirm that you fully understand the meaning of the
following messages (signs) before reading the text, and always
follow the instructions.
Please read the Installation & Maintenance Manual for related
apparatus and understand it before operating the actuator.
Read this manual and follow the instructions.
Signal words such as WARNING, CAUTION and NOTE, will be
followed by important safety information that must be reviewed
carefully.
IMPORTANT MESSAGES
Indicates a potentially hazardous situation
which could result in death or serious
injury if you do not follow instructions.
Provides you helpful information.
Do not disassemble, modify (including change of printed
circuit board) or repair.
An injury or failure can result.
Do not operate outside of the specification range.
Fire, malfunction or damage can result.
Please use it after confirming the specification.
Do not use the product in environments with possible
presence of flammable, explosive or corrosion gas.
Otherwise fire, explosion or corrosion can result.
The product is not designed to be explosion proof.
• Connect wires and cables correctly.
• Do not connect wires while the power is on.
• Do not lay wires or cables with the same wiring route as a power line
or high-voltage line.
• Verify the insulation of the wiring.
• Take proper measures against noise such as a noise filter when the
product is incorporated in equipment or devices.
• Select an operation environment according to enclosure(IP67).
• Take sufficient shielding measures when installing the product at the
following place.
(1)A place where a noise due to static electricity etc. is generated
(2)A place of high electric field strength
(3)A place possibly exposed to radioactivity
(4)A place near power cable
• Do not use the product nearby a place where an electric surge is
generated.
• Use the product equipped with a surge absorber when a surge-
generating load such as a solenoid valve is driven directly.
• Prevent foreign matter such as remnant of wires from entering the
product.
• Do not expose the product to vibration and impact.
• Keep the specified ambient temperature range (+5 to +45
o
C).
• Do not expose the product to heat radiation from a heat source
located nearby.
• Use a precision screw driver with small flat blade when setting rotary
switch and DIP switch.
• Perform maintenance and check at regular intervals.
• Perform a proper functional check.
• Do not clean the product with chemicals such as benzine and thinner.
Safety Instructions
Indicates a potentially hazardous situation
which if not avoided, may result in minor
injury or moderate injury.
Do not apply voltages exceeding 250V between a lead
wire and a metal fitting.
Pay attention to perform an insulation test because it could damage
the insulation of the lead wire and cause failure.
These instructions must be followed when using the
product in an interlocking circuit:
• Provide double interlocking through another system
such as mechanical protection.
• Check the product regularly to ensure proper operation.
Otherwise malfunction can cause an accident.
These instructions must be followed when performing
maintenance work:
• Turn off the power supply
• Stop the air supply, exhaust the residual pressure and
verify that the air is released before performing
maintenance work.
Otherwise it can cause injury.
Perform a proper functional check after completing
maintenance work.
Stop operation when an abnormality is observed or the product is not
working properly.
Safety cannot be assured due to unexpected malfunctions.
NOTE
The direct-current power supply should be a UL authorized power
supply.
1.Limited voltage current circuit in accordance with UL508
A circuit to which power is supplied by the secondary coil of a
transformer that meets the following conditions.
• Max. voltage(with no load): less than 30Vrms (42.4V peak)
• Max. current: (1)less than 8A(including when short circuited)
(2)limited by circuit protector (such as fuse) with the
following ratings
2.UL1310 compatible class 2 power supply unit or circuit of max.
30Vrms (42.4V peak) or less using a UL1585 compatible class 2
transformer as power supply. (Class 2 circuit)
Follow the instructions given below when handling the product.
Failure to follow instructions may damage the unit.
• Operate the product within the specified voltage range.
• Reserve a space around the unit for maintenance.
• Do not remove labels.
• Do not drop, hit or apply excessive shock to the product.
• Do not bend or apply tensile force to cables, or apply a force by
placing a heavy load on them.
No load voltage (V peak)
0 to 20 [V]
20 to 30 [V]
Max.current rating (A)
5.0
100 / peak voltage
Specification
Item
Specification
Operating ambient temp.
+5 to +45
o
C
Operating ambient humidity
35 to 85% RH (No dew condensation)
Storage ambient temp.
-20 to +60
o
C
Vibration proof
10 to 57Hz 0.35mm (Constant amplitude)
57 to 150Hz 50m/s
2
(Constant acceleration)
Impact proof
150m/s
2
(peak), 11ms three times in each
direction ± X, Y and Z
Noise immunity
Normal mode : ±1500V Pulse duration 1us
Common mode : ±1500V Pulse duration 1us
Radiation : ±1000V Pulse duration 1us
Withstand voltage
500V AC for 1min.
Insulation resistance
500V DC min10M ohm
Operating environment
No corrosive gas and no dust
General specification
Outline with Dimensions (in mm)
Item
Specification
Power voltage
range Current
consumption
Power for SI/Input
Block Current
consumption
19.2 to 28.8V DC
Max. 1.1A or less
Depending on the number of Input
Block stations and sensor
specifications
Power for solenoid
valve Current
consumption
22.8 to 26.4V DC
Max 2.0A or less
Depending on the number of solenoid
valve stations and specifications
Solenoid valve
connection
spec.
Output type
N-ch MOS-FET Open drain type
Connection load
Solenoid valve with protection circuit
for 24V DC and 1.5W or less surge
voltage (made by SMC)
Insulation type
Opto coupler type
Electrical and network
Residual voltage
0.3V DC or less
Body
• Communication connector
To send and receive communication signals through CC-Link line.
• Power supply connector for output equipment, SI unit and Input
block
To supply power to the output equipment such as a solenoid
valve, and output block, SI unit and Input block.
• Output equipment connector
To connect the output equipment such as a solenoid valve and
output block.
• Input block connector
To connect the Input block.
• Indication and address setting panel
To provide LED's to indicate the condition of the unit and the
address setting.
• Ground terminal
To be connected to the ground.
Safety Instructions (continue)
Solenoid valve
connection
spec.
station No.
assignment range
1 to 63
(assigend by the rotary switch)
Baud rate setting
range
156kbps, 625kbps, 2.5Mbps, 5Mbps,
10Mbps,
(Assigned by the rotary switch)
Applicable system
CC-Link Ver.1.10
Occupied station
2 stations
Station type
Remote device station
I/O points
Input/32 points Output/32 points
Names and Functions of Individual Parts
EX250-TFI74GB-A
Communication
connector
Ground terminal
Power supply connector
for output equipment,
SI unit and Input block
Indication and address
setting panel
Output equipment
connector
Input block connector
(M
ax
. 1
18
)
