In-Situ TROLL Net Hub Instruction Sheet - Manual (Page 3)

Instruction Sheet
Number Wire Color Function
3 Blue RS485 (+)
4 Red Power DC+
The center screw terminal block is the master, which
connects to the TROLL
® Link Telemetry System or
PLC. On 8-port TROLL Net Hubs, which has two circuit
boards, one circuit board master screw terminal is wired
to the second circuit board master screw terminal.
Number Description
1
Board 1 Master Terminal (to board 2
Master)
2
Board 2 Master Terminal (to telemetry,
PLC, or other TROLL Net Hub)
For bulkhead connector models, disconnect the Red
Power DC+ wire from the screw terminal of any port
that is not being used.
NEVER disconnect the Red Power DC+ wire
from a master terminal.
Internally (9V Battery) Powered 4-port or
8-port TROLL Net Hub
Each screw terminal of an internally powered TROLL
Net Hub is wired the same way, with the exception of
the master terminal(s).
Number Wire Color Function
1 Black Ground
2 Green RS485(-)
3 Blue RS485(+)
The center screw terminal block is the master, which
connects to the TROLL
® Link Telemetry System or
PLC. On 8-port TROLL Net Hubs, which has two circuit
boards, one circuit board master screw terminal is wired
to the second circuit board master screw terminal.
Number Wire Color Function
1 Black To 9V Battery (-)
2 Black Ground
3 Green RS485(-)
4 Blue RS485(+)
5 Red To 9V Battery (+)
DO NOT connect the red Power DC(+) wire from an
instrument cable to a screw terminal when the
TROLL Net Hub is internally powered. Connecting this
wire causes the instrument to use the 9V battery as an
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