BRUEL & KJAER VIBROCONTROL 8000 - TMM Sensor Wiring

© Brüel & Kjaer Vibro ● S1079330.002 / V04 ● █ Page 49 of 188
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Brüel & Kjaer Vibro │ Instruction
VC-8000 MPS
Content
EN
8.2 TMM Sensor Wiring
The TMM can accept any combination of 2, 3, and 4-wire RTDs or thermocouples.
8.2.1 Wiring RTDs
Figure 8-10) RTD Wiring
RTD
A
B
C
D
Shield
2-wire
NC
White
NC
Red
Shield
3-wire
NC
White
Red
Red
Shield
4-wire
White
White
Red
Red
Shield
Table 8-1) RTD wiring table (IEC 751/ASTM Color Codes)
NOTE!
Some RTD manufacturers (e.g. Minco) have color codes other than IEC 751/ASTM. Be
sure to verify wiring with the information provided with the RTD.
The TMM compensates for the RTD wiring resistance. However, differences in resistance between
the legs of 3-wire RTDs, or temperature drift of the 2-wire RTD extension wires will introduce errors.
Brüel & Kjær Vibro recommends a maximum of 25 ohms of field wiring resistance.
NOTE!
You can share common RTD return wires across channels 1, 2, & 4 and across
channels 3, 5, & 6. Using common return wires between these two groups will cause
reading errors. To avoid confusion - do not share return wires.
The TMM scans two channels at a time in groups of channels 1,2,4 and 3,5,6. If your RTDs share a
common return line, the common line should not be shared across these two groups. Otherwise the
TMM will drive two sensing currents through the common return line and cause reading errors. To
avoid confusion – do not share return wires.