Resistance Temperature Device (Rtd) Inputs On Cpu/System Controller Board - Emerson ControlWave EFM 3808 Instruction Manual

ControlWave Express Instruction Manual (CI-ControlWave Express)
3.3.7 Resistance Temperature Device (RTD) Inputs on CPU/System
Controller Board
Caution
3-12
CPU/System Controller Board connector TB6 provides connection to a
3-wire 100 ohm platinum bulb RTD (using the DIN 43760 curve).
Wire the RTD according to Table 3-9 and Figure 3-4 and Figure 3-5. In
this configuration, the return lead connects to the RTD- terminal and the
two junction leads (Sense and Excitation) connect to the RTD+ and
RTD EXC terminals.
Never ground the RTD cable shield at both ends or allow it to come in
contact with metallic/conductive conduit because multiple ground paths
can cause RTD input errors.
Table 3-9. RTD Connections to CPU/System Controller Board
Connector TB6
TB6 Pin
1
2
3
Figure 3-4. 3-Wire RTD Temperature Input Wiring
I/O Configuration and Wiring
Signal
RTD EXC
RTD+
RTD-
Function
Reference
Sense
Return
Revised Mar-2011