Figure 26: Two-Levelmaster Rs-485 Bus Of Same Board Type Using Single Communication Contact Pair; Figure 27: Two-Levelmaster Rs-485 Bus (Mixed Board Type) - ABB LevelMaster 7100 User Manual

Figure 26: Two-LevelMaster RS-485 bus of same board type using single communication contact pair

Figure 27 displays wiring between two LevelMasters with different board types. The first LevelMaster is the intermediate sensor
on the bus. The additional LevelMaster, with a legacy board, is the last sensor on the bus and must be configured to terminate
the bus (JP1 jumpers are placed on 5-6, 7-8 and 9-10 as indicated in section 4.1.3, Onboard termination jumpers (legacy boards
only).
J1
Legacy electronic board
(2018546-005)
Last sensor on RS485 bus
IMPORTANT NOTE: When wiring from the LevelMaster to the host controller, do not cut off spare wires. Tape
them securely back to the cable jacket as spares, in case of damage.
LevelMaster 7100 User manual 2105835 Rev AA | 30
1
2
JP1

Figure 27: Two-LevelMaster RS-485 bus (mixed board type)

To host controller and power source:
1) Direct connection or
2) Through barrier
J11
T- T- T+ T+
1
EARTH 3
New electronic board
J12
Intermediate sensor on RS485 bus
- +
POWER
D9
(2104836-001)