LINK Systems 5100-8 Tonnage & Analog Signal Monitor - Manual (Page 56)

Doc #: L-802-1110 Page 54 Rev. 02
NOTE: Always use the cable specified by Link Systems for the high speed serial bus!
This cable has been chosen to optimize communication speed and distance for
the serial bus. Use of any other cable may result in communication faults that
cause nuisance stops of your press production system. DO NOT splice cable
sections between modules. Use only unbroken runs of cable between modules.
NOTE: With the exception of the operator terminal (which must be at one end of the
bus) and the 5000-12 card in the OmniLink 5000 card rack (if used, it must
NOT be at the end of the bus), devices do not have to be connected on the high
speed serial bus in any particular order. However, they MUST BE connected in
“daisy-chain” fashion as shown in Figure 24 and Figure 25. It is desirable to
minimize the length of the high speed serial cable. In any case, the maximum
allowable total length of the high speed serial bus is 300 feet (91.4 meters).
The 4 pin plug supplied for connection of the high
speed serial bus is a double connector plug. As
shown in Figure 26, this plug allows for the high
speed serial bus cable to be strung from module to
module. Note that unlike the power connector,
this plug has screws on each side for locking into
the socket. This connector should be screwed
down for trouble-free operation. Please refer to
Figure 22 for how to wire this connector.
High Speed Serial
Cable To Next
Module High Speed Serial
Cable From Last
Module
Shield Wires
MUST Be
Connected
To Plug
Serial Bus
Connector
For Module
High Speed Serial
Cable To Next
Module High Speed Serial
Cable From Last
Module
Shield Wires
MUST Be
Connected
To Plug
Serial Bus
Connector
For Module
Figure 26: High Speed Serial Bus Connector
6.5 Setting the High Speed Serial Bus Termination Switch
The high speed serial bus must be terminated at both ends. The operator terminal is always terminated
and therefore MUST BE at one end of the bus. The last device at the end of the bus must also be
terminated. Devices not at the end of the bus should NOT be terminated. Each device has a termination
switch and an indicator LED to display whether or not
termination is active. To find the termination switch, loosen the
knurled screws at the top and bottom of the module and slide the
module out of the card rack.
FUSE 5X20 FUSE 5X20
PO
WER
CON
N
EC
TO
R
PO
WER
CON
N
EC
TO
R
HIGH SPP
ED BUS
CO
N
NE
CT
O
R
HIGH SPP
ED BUS
CO
N
NE
CT
O
R
<O
N
Termination
Switch
Module
Faceplate
WARNING! ALWAYS remove the power connector from
the module before removing the module from
the card rack! Lethal voltages are present on
the circuit board when the unit is powered!
The termination switch is located as shown in Figure 27. The
switch should be “up” for termination to be active and will be
indicated by the lighting of the red indicator LED on the
faceplate. If the Tonnage Monitor is at the end of the bus, then
turn the switch ON. Otherwise, leave this switch OFF.
Figure 27: Termination Switch