Resistance Temperature Device (Rtd) Inputs On Scm - Emerson ControlWave EFM Instruction Manual

ControlWave EFM Instruction Manual

3.7 Resistance Temperature Device (RTD) Inputs on SCM

Caution
3-16
System controller module connector TB2 provides connection to a 3-
wire 100 ohm platinum bulb RTD (using the DIN 43760 curve).
Wire the RTD according to Table 3-9, Figure 3-8 and Figure 3-9. 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 System Controller Module Connector
TB2
TB2 Pin
1
2
3
Figure 3-8. 3-Wire RTD Temperature Input Wiring
I/O Modules
Signal
RTD EXC
RTD+
RTD-
Function
Excitation
Sense
Return
Revised Dec-2013