LevelMaster 7100 User manual 2105835 Rev AA
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To wire for communication:
1.
Remove the communication 4-position terminal connector from the port (J11).
2.
Loosen the screws on the communication connector.
3.
Insert the wires in the connector, observing the pinout required. If wires are color-coded, take note of the color for each pin.
If not color-coded, label or keep track of the wire positions to ensure that they will be connected to the correct pins on the
other end of the wire, either at the controller or another LevelMaster (if connecting to a multiple-unit bus).
IMPORTANT NOTES:
For electronics boards, part number 2104836-001, RS-485 termination is performed on
software. No jumpers for hardware configuration are available onboard.
Configure RS-485 termination according to the position of the LevelMaster on the RS-485 bus:
If it is the only unit installed, ensure that it is configured to terminate the RS-485 bus. See section 5.3.2,
Configuring RS-485 bus termination
.
If it is the first of unit on the RS-485 bus, ensure that it is configured as an intermediate sensor (factory
default).
For legacy boards (part number 2018546-005), terminate as described in section 4.1.3,
Onboard termination
.
a.
If the unit is the only unit connected to the flow computer or remote controller, insert the wires run from the host
controller in one of the pin pairs available (first and fourth pin, or second and third pins on J11). Secure the inserted
wires by tightening the screws on the connector.
b.
If the unit will be connected to a multiple-unit RS-485 bus:
i.
Insert the communication wires run from the host controller in the outer (T+, T-) pair, first and fourth pin on J11.
ii.
Insert the communication wires run from an additional LevelMaster in the remaining pin pair as described in
Section 4.4,
Wiring additional LevelMasters
4.
Proceed to section 4.3.2,
.
Wiring for power
The LevelMaster can be powered from an external power source or from the host controller (Figure 22).
Figure 22: Wiring for power (single board installation)
When using ABB Totalflow flow computers or remote controllers, power can be provided from their serial (COM) ports,
eliminating the need for an external power supply.
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