SMC Networks EX500-GEN2 Operation Manual page 25

Transmission distance
For the communication wiring, use a PROFIBUS DP compatible twisted pair cable with shield.
The maximum cable length depends on the transmission rate and the cable type to use. The following table
shows the values cable Type A (see ∗) is used.
Transmission
9.6
speed [kbps]
Cable length [m]
∗: Cable Type A specification
Item
Impedance 135 to 165 Ω
Capacity 30 pF/m or less
Loop resistance 110 Ω/km
Wire diameter 0.64 mm or more
Core cross-section 0.34 mm
Lower-level bus
Item
Number of branches for
input/output
Communication method
Branch current for input
Branch current for output
Branch cable length
19.2 45.45 93.75
1200
Specification
2
or more
4 branches (16 points/branch) for input
4 branches (16 points/branch) for output
Protocol: Dedicated for SMC
Speed: 750 kbps
Max. 0.7 [A] per branch
Max. 0.65 [A] per branch
(when SI unit EX500-S001 is connected)
Max. 0.75 [A] per branch
(when SI unit EX500-Q□0
5 m or less per branch
(total extended length: 10 m or less)
187.5 500 1500
1000 400 200
Specification
1
is connected)
2
-23-
3000 6000 12000
100
No.EX##-OMO0019