CTI 062-00108, Installation And Operation Manual

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C T I 2552 Installation and O peration G uide
Figure 9 Copper Wire Table at 25 Degrees Celsius
2.6 Wiring the Input Connectors
RTD input signals are accepted through a screw terminal connector block located on the front of the
module. Consult the RTD manufacturer's recommendations for selecting the input wire type and size.
The Model 2552 uses a fixed connector to terminate field wiring. This is used because the chemistry of
a removable connector may have an adverse effect on the accuracy of the measurement. CTI has
carefully selected a connector that minimizes this effect.
Refer to Figure 11 for correct wiring for 2, 3, or 4 wire RTDs to the Model 2552. Each channel group
consists of four screw terminals. See Figure 10.
The Model 2552 may compensate for up to 20 Ohm of lead resistance per wire. Use the table in
Figure 9 in planning the maximum distance the RTD may be located from the module.