Festo CMXR-C2, Сборка и инструкция по установке

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3. Installation of the central control unit CMXR-C2
36 Festo GDCP-CMXR-C2-HW-EN 1002NH
CAN cable Description
Cable type Twisted, screened two-wire cable with signal earth.
The CAN connection must be made using a suitable cable. We recommend a data
cable as set out in ISO/DIS 11898 (CAN standard). A multi-strand, twisted cable
can also be used. Please note that the CAN+ and the CAN- cables are twisted
together to form a wire pair.
Surge impedance:min. 108 Ω, typ. 120 Ω, max. 132 Ω.
Line resistance: typ. 70 mΩ/m
Signal running time: typ. 5 ns/m
Cable length Depends on the bit rate of the CAN bus transmission
Minimum bending
radius
Minimum bending radius during the installation: 48 mm
Minimum bending radius for an installed cable: 24 mm
Plug type 9-pin D-SUB socket plug with completely conductive housing
Table 3.5 CAN cable specification
1 Twisted 2-wire
cable (CAN+, CAN-)
2 Signal earth
(SGND)
3 Screen with
earth shield
Fig. 3.2 CAN cable
The cable screening must be connected flush with the plug's screen housing. An
additional screening and earthing connection is not necessary.
Non-product specific signal and data transmission lines that are
not
connected to the
device must not be used in a cable with product-specific signal and data transmission
lines. All screened signal, data and low-voltage supply lines with screening on both sides
must be laid parallel to one another and also parallel to the power supply lines.
CAN module connection with modules (without optocoupler)
Bit rate [kbit/s] Maximum cable length, typical [m]
125 500
250 250
500 100
1000 40
Table 3.6 Cable lengths of CAN cable
1
2 3