Instruction manual

ControlWave ExpressPAC Instruction Manual (CI-ControlWave EPAC)
3-12 I/O Configuration and Wiring Revised Mar-2011
3.3.7 Resistance Temperature Device (RTD) Inputs on CPU/System
Controller Board
CPU/System Controller board connector TB6 provides connection to a
3-wire 100 ohm platinum bulb RTD (using the DIN 43760 curve). The
RTD connection enters the unit through the bottom of the enclosure.
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.
Caution
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 Signal Function
1 RTD EXC Reference
2 RTD+ Sense
3 RTD- Return
Figure 3-4. 3-Wire RTD Temperature Input Wiring
ControlWave ExpressPAC
CPU/System Controller
Board