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Installation
8.4.5 Thermocouple Input Wiring
Function blocks AINU1 and AINU2 can be configured for thermocouple or RTD input.
Thermocouple input wiring is shown in Figure 8-16. Shown is a typical grounded tip thermocouple. If an
ungrounded thermocouple is used, the thermocouple wire shield can be grounded at the Moore 353. Thermocouple
wire often has a solid conductor. Make connections as outlined in Section 8.4.2. Be sure that the solid conductor is
satisfactorily clamped by the terminal screw and pressure plate. Two reference junctions (RJ) are supplied in the
I/O Expander board installation kit. Install as outlined below.
FIGURE 8-16 Universal Analog Input AINU1, Thermocouple Input
Thermocouple reference junction (RJ) installation:
1. Slip a length of insulating sleeving over the portion of each reference junction lead that will remain exposed
after installation. Carefully form the leads as shown below.
0.63
(15.9)
(7.9)
(0.25)
Notes:
1. Insulate leads with sleeving.
2. Dimensions are in inches (millimeters)
and are approximate.
Direct Entry Connector
2. Note the connector type and loosen the two terminal screws using a straight blade screwdriver with a 1/8" (3
mm) blade width. Insert the reference junction leads into the two openings in the side of the connector adjacent
to the selected terminal numbers. Position the Reference Junction as described for the connector type at hand.
1) Direct Entry Connector - Carefully press the reference junction down between the connectors.
8-18
Model 353
Rear Terminals
+
45
Thermocouple Wire
T/C
+
46
_
47
RJ
_
48
Notes:
1. RJ - Cold Junction Reference
2. See Table 8.1 for AINU2 terminals.
3. Grounded junction shown. For ungrounded junction, connect
cable shield to AINUc_ (Analog Input Universal Common).
0.06
(1.5)
0.3
0.5
(12.7)
0.1
FIGURE 8-17 Reference Junction Lead Forms
Isolated
Power
Universal
Converter,
Isolated
Inputs
Isolated
Ground
X03114S2
0.25
0.75
(6.4)
(19)
Notes:
0.5
1. Insulate leads with
(12.7)
sleeving.
2. Dimensions are in
inches (millimeters)
0.1
and are approximate.
(0.25)
Side Entry Connector
UM353-1
March 2003
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