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Hazardous locations
In hazardous locations, the LevelMaster can not be directly wired to the host controller or power supply. The LevelMaster and
the host controller must be wired through a CSA-certified barrier board that can be purchased from ABB Totalflow. Figure 32
shows the barrier board, onboard connectors and pinouts.
The intrinsically-safe terminal connectors (shown at the bottom left corner of the board) provide the connection points for the
LevelMaster. The terminal connectors shown at the top of the board provide the connection points to the host controller and
power supply (if one is required).
IMPORTANT NOTE: The CSA
installation drawing document listed on the nametag (document number 2018387-CD).
Limitations when using barrier boards
Hazardous area certification restrictions limit the number of LevelMasters and the length of cable that can be fed through the
barrier. Those limitations are described in Table 6.
Installation scenario
Group D Locations
Group C Locations
Wiring the LevelMaster to the barrier board
This procedure wires the LevelMaster to the intrinsically safe connectors on the barrier board.
To wire the LevelMaster to the barrier board:
1.
Remove the intrinsically safe J2 and J3 terminal connectors (Figure 33).
2.
Loosen the screws on the J2 and J3 terminal connectors.
3.
Insert the wires from the LevelMaster in the correct connector pins:
a.
Insert communication wires in CHANNEL 1 and CHANNEL 2 on J3.
b.
Insert power wires in the Power OUT and GND pins on J2.
certified barrier must be installed in a safe area, in conformance with the control
-
Figure 32: Totalflow CSA-certified barrier board
Table 6: Wiring limitations when using barrier boards
Barrier board
Number of
part number
barriers
2100336-001
1
2100336-002
1
Maximum wire length (in feet)
from barrier to LevelMaster
500
500
LevelMaster 7100 User manual 2105835 Rev AA | 35
Maximum number of
LevelMasters on the bus
per barrier
4
3
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Troubleshooting
