SMC Networks EX120-SDN1 - Manual (Page 5)

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3. Wiring and Setting
2-3. Applicable solenoid valve series
SI unit Valve series
EX120 VQ1000, VQ2000
EX121 VQ1000, VQ2000, SX3000, SX5000
EX122 SY3000, SY5000
EX124U/D VQ2000, VQ4000, VQ5000
Terminal resistance
Node Node
Node Node
Node
Node
Node
Node
Node
Branch
line
Branch
line
Branch
line
T branch
Branch line
branch
Main line
Multi branch
Terminal resistance
Communication
distance
Baud rate
Total length of
trunk
Length of
branch line
Total length of
branch line
500 kbps 100m or less 39m or less
250 kbps 250m or less 78m or less Thick cable
125 kbps 500m or less
6m or less
156m or less
Thin cable Common 100m or less ――――――
Terminal resistance 121 ohm (1/2W)
Length of cable
3-1.Connection type
DeviceNet can be connected by T branch, Multi branch, Branch line branch and Multi drop. Total
extension length of trunk and Branch line is different for different Baud rate and thickness of
communication cable.
SI unit I/O data (Receiving and sending data of polled command)
Item Output(Poll request) Input(Poll response)
Occupied byte 2 byte
(Solenoid valve output)
2 byte
Address +0 Output No. 0 to 7 Sending/
receiving data Address +1 Output No. 8 to 15
Bit of each output data and corresponding solenoid valve no.
Offset MSB LSB
0 No.7 No.6 No.5 No.4 No.3 No.2 No.1 No.0
1 No.15 No.14 No.13 No.12 No.11 No.10 No.9 No.8
SMC CORPORATION
Doc.No.EX ## -OME0015
*) Mapping method of sending / receiving data is different by PLC.
For further information, refer to the manual for PLC master (scanner)