47
EIA-485 Network Wiring
USER GUIDE
MACH-PROCOM/MACH-PROWEBCOM
MACH-PROCOM
™
/MACH-PROWEBCOM
™
2007 − 2015 Reliable Controls
®
Corporation. All rights reserved.
FIGURE 49: MACH-Pro(Web)Com EIA-485 REMOVABLE NETWORK CONNECTORS
TO CONNECT THE MACH-PRO(WEB)COM TO A NETWORK
FIGURE 50: SHIELDED NETWORK CABLE CONNECTIONS
1 Using certified communication cable with an ideal Characteristic Impedance of 108,
18–22 AWG (0.82–0.33 mm
2
) twisted-pair low-capacitance (below 25 pF/ft.),
connect one conductor to the A terminal and the other to the B terminal of the
controller.
2 Daisy-chain the network cable as detailed in Figure 50 (avoid star and stub
connections).
3 Ground the shielding in one place only and join inter-networked shields together
using a wire nut (marrette). Each network should only have the shield grounded in
a single location.
Shield
Shield Ground
EOL
EOL
EOL
Network shields connected with marrette
Controller 1
Controller 3
Controller 2
Switches In
Switches Out
Switches In
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