Allen-Bradley CompactBlock LDX 1790D-4T0, User Manual

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Publication 1790-UM003A-EN-P - May 2002
Installation and Wiring 2-15
4. At the other end of the cable, cut the drain wire and foil shield
back to the cable and apply shrink wrap.
5. Connect the signal wires to the terminal block. Connect the other
end of the cable to the analog input device.
6. Repeat steps 1 through 5 for each channel on the module.
Wiring the Terminal Blocks
The following figures show how to wire the terminal blocks.
Figure 2.1 1790D-4R0-RTD Input Module D-Shell Wiring
Figure 2.2 1790D-T4R0 and 179P-T4R0 RTD Input Module D-Shell Wiring
TIP
See Appendix D Using Thermocouple Junctions for
additional information on wiring grounded,
ungrounded, and exposed thermocouple types.
IMPORTANT
When using an ungrounded thermocouple, the shield
must be connected to ground at the module end.
19 18 17 16 15 14 13 12
11
10
9
8 7 6 5 4 3 2 1
37
36
35 34
33 32 31
30 29 28 27 26 25 24 23 22
21
20
+24V NC
NC
NC
CH0_A
CH0_B
CH1_A
CH1_B
NC
NC
CH2_A
CH2_B
CH3_A
CH3-B
NC
NC
NC
GND
GND
+24V +24V
GND
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
Wire pins 17, 18, 19 to Field Power (+) 24V dc
Wire pins 35, 36, 37 to Field Power (-) GND
43256
20
18
16 14 12 10
8 6 4 2
19 17 15 13 11 9 7 5
3 1
NC NC CH3_B NC CH0-B
NC
NC
CH2_B CH1_B GND
NC NC CH2_A CH1_A
+24V
NC NC CH3_A NC
CH0_A
432X1
Wire pin 1 to Field Power (+) 24V dc
Wire pin 2 to Field Power (-) GND
AB Drives