ProSoft Technology WRC-CANX - Manual (Page 30)

Western Reserve Controls WRC-CANX-xx Series 4
PUB 14.1 User’s Manual
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4. Why does WRC offer CANX & CANR extenders?
The WRC-CANX/R Extenders are a family of products that extend the communications cable
lengths for DeviceNet, J1939, CANopen and other CAN, V2.0, Part A or Part B serial bus systems.
These repeaters serve to:
•
extend a network beyond its absolute maximum length (e.g., 500 meters for DeviceNet) at the
slowest speed
• implement a longer network for a given baud rate (e.g., pushing a 500K baud network beyond
100 m for DeviceNet)
• provide higher speed baud rates for a given network length
•
extend the length of the drop cable (e.g., longer drops than 6 m for DeviceNet)
•
provide 2500V electrical isolation between 2 sub-nets.
•
allow the user to employ non-linear network topologies (e.g., star, tree, etc.)
5. What types of connections are available for WRC CANX and CANR extenders?
Please see question 3 if you need to know what connectors come on which WRC CANX or CANR
models.
Several of the WRC CANX and CANR extenders come with the 5-pin CANbus connection plug,
which accepts cable sizes from 12 AWG - 24 AWG. This is the standard round, mini-style connector
(M18) with male pins for copper cable. A standard DeviceNet cord with a female end connects to
the CANX or CANR.
• Turck supplies individual connectors ends that can be used to build custom DeviceNet or
copper cables (part number B4151-0/16 is a 5 pin, 600V, 9A connector that comes in a male or
female variety that will connect to the CANX or CANR). Please refer to
www.turck.com to find a
distributor near you.
•
If you are interested in purchasing pre-fabricated cables with the proper DeviceNet connectors,
Brad Harrison is the manufacturer of Woodhead P/N 105002A01F030 (male pins) and
Woodhead P/N 105000A01F030 (female pins), which are distributed by Gross Automation at
http://www.bradharrisonsales.com/ along with many other 5-pole plug in options. All Woodhead
products that are compatible with WRC CANX and CANR are called “mini-change” cordsets.
• Standard Phoenix connectors for use with non-NEMA enclosed units will be supplied with your
order if you choose a model using these connectors.
•
WRC CANRs use fiber optic receiver/transceivers that are compatible with different fiber
grades, so long as they are terminated with ST fiber connectors.
6. At what baud rates do the WRC CANX and CANR function?
The WRC CANX and CANR function at baud rates of 9.6K, 10K, 20K, 40K, 50K, 100K, 125K, 250K,
500K, 800K and 1M fixed and will auto-detect the baud rate on DeviceNet. The CANX and CANR
are also capable of handling different baud rates on each side (e.g., a network with a baud rate of
125K plugged into Network side A can communicate with, through the CANX or CANR, a network
with a baud rate of 1M on Network side B).
7. Does the WRC CANX or CANR require additional termination resistance on the data lines?
The WRC CANX or CANR functions as the beginning or ending of a new segment of the network.
With no power supplied to the network, the resistance across the CAN data lines should be
approximately 60 ohms (two 120-ohm resistors in parallel—one on each “end” of the network bus).