MT100 Multipoint Flow Meter INSTALLATION
Flow Element Connections
See the appropriate wiring diagram in APPENDIX A for interconnect wiring between the flow element and remote electronics. Run
separate 8-conductor shielded cable per sensing element. The flow meter will not operate properly without these connections. If the ACT
and REF wires are reversed the flow meter will not function properly (inaccurate flow/temperature readings). Use shielded cable with all
signal applications. For the flow element wiring (non-QDC application), connect the shield to GND in the transmitter enclosure. The other
end of the shield is left floating (no connection to the flow element enclosure).
As shown in Figure 22 below the MT100 flow element sensors connect to detachable 9-position connector plugs (8 total) on the SB4 main
board and the optional SB8 extension board (on standoffs). The connector plug accepts 28-16 AWG (0.14 mm
2
-1.5 mm
2
) wire (refer to
Table 2, page 23 for wire size vs. length info). Connect a flow element sensor to the appropriate plug as follows:
1. Remove connector plug from board (pull straight out).
2. Route sensor wires through remote enclosure’s conduit opening/cable gland.
3. Strip wire ends (0.27 in [7 mm]) and connect to appropriate connector terminals as shown in Figure 22.
4. Plug connector block back into its pin socket on the board.
5. Gather sensor wires into a bundle (use tie-wraps as required) and push them into the nearest cable guide bushing.
6. Repeat steps 1-5 for remaining flow element sensors.
Detachable 9-Position
Sensor 5 Sensor 6 Sensor 7 Sensor 8
Connector Plug (4 places with SB4 only,
or 8 places with SB8)
Screw Clamp
SB8, Extension
Board
Wire Entrance
HTR EXC
HTR RTN
ACT EXC
ACT SEN
GND SEN
GND
REF EXC
REF SEN
SHIELD
Cable Guide Bushing
(8 Places)
SB4, Main
Board
Sensor 4
Sensor 1
Sensor 3
Sensor 2
C01283-1-1
Figure 22 – Flow Element Connections
Fluid Components International LLC 25
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