I-2532 CR # CAN/Fiber Converter (RoHS)
Fiber optic transmission medium is a good material to protect data transmission from EMI/RFI interference and has been used in harsh environment extensively. On the other hand, CAN bus is famous in industrial application. In order to solve the problem between different transmission medium, I-2532 is specially designed for converting the electrical CAN bus signal to fiber optic cables.
The fiber length between two I-2532s can be up to 1.4km (4593ft), it is mainly decided by the cable attenuation of fiber and the CAN bus baud. I-2532 is the economic solution for applications which require protecting the data transmission from electrical exposure, surges, lightning or chemical corrosion.
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CAN Interface
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Connector
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8-pin screwed terminal block (CAN_GND, CAN_L, CAN_H, N/A for others)
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Baud Rate (bps)
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10 k ~ 500 k
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Transmission Distance (m)
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Depend on baud rate
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Terminator Resistor
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Switch for 120Ω terminator resistor
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Specification
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ISO-11898-2, CAN 2.0A and CAN 2.0B
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Fiber Interface
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Connector
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ST (Multi-mode)
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Wave Length
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850 nm
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Fiber Cable
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62.5 / 125 μm
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Propagation Delay
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125ns max (125ns delay shortens bus line length by ~ 25 m)
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Transmission Distance (m)
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1.4 km max (in 62.5/125 μm fiber cable)
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LED
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Round LED
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PWR LED, TD LED, RD LED
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Power
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Power supply
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Unregulated +10 ~ +30 VDC
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Protection
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Power reverse polarity protection, Over-voltage brown-out protection
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Power Consumption
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0.5 W
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Mechanism
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Installation
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DIN-Rail
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Dimensions
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32.3mm x 77.5mm x 99.0mm (W x L x H)
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Environment
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Operating Temp.
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-25 ~ 75 ℃
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Storage Temp.
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-30 ~ 80 ℃
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Humidity
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10 ~ 90% RH, non-condensing
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Users can refer to the following table to know the maximum node numbers in each segment following ISO 11898-2 and the maximum segment length when using different type of wire.
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Wire Cross-
Section [mm2]
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The maximum segment length [m] under the
case of specific node number in this segment
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16 Nodes
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32 Nodes
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64 Nodes
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100 Nodes
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~0.25 (AWG23)
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< 220
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< 200
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< 170
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< 150
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~0.5 (AWG20)
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< 390
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< 360
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< 310
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< 270
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~0.8 (AWG18)
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< 590
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< 550
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< 470
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< 410
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~1.3 (AWG16)
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<980
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<900
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<780
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<670
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Higher attenuation of fiber will reduce the transmission distance. Users can use following table to know the relationship between those two.
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Attenuation [dB/km]
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Fiber Length [m]
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2.8
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<1400
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4
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<400
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The limitation of baud on a CAN bus system is restricted by propagation delay. On the other hand, long bus length leads to long propagation delay. The relationship between baud and bus length is displayed below.
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Baud [bit/sec]
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Ideal Bus Length [m]
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500K
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< 100
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250K
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< 250
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125K
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< 500
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50K
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< 1000
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20K
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< 2500
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10K
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< 5000
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