Operation Manual

Network Connections
Product Reference Guide 21
When wiring the multidrop cables, note the following:
• Pin 8 (or 7) can be connected only if the power has to be
propagated from a cradle to
a STARGATE™ base station or STAR-Box™ converter via the cable.
• Pins 5 (or 4) should always be connected as re
ference ground.
• To avoid excessive voltage drop, it is recommended not to propagate power between
BC-8060 cradles when
used as battery chargers but to supply each cradle individually.
The total number of devices, which can be connected to a single power supply,
depends on the power supply voltage, the wire length and resistance and therefore the
voltage drop. Do NOT connect VDC+ between network devices that are individu-
ally powered.
Network Termination
The first and last cradles of the chain (the two ends of the bus) must be properly terminated.
The cradle has an internal terminator that can be selected via jumper. For this selection you
must open the device.
Figure 11. Terminator for Multidrop Network
Static termination works for all network configurations. However, the network is always
under load even when no data transmission takes place.
Dynamic termination can be used for baud rates at or above 38400 and provides less
load on
the network when idle.