West Control Solutions MRC 9000 - Manual (Page 28)

Section 2 2-9 Edition 3
Rev G
2.3.4 THERMOCOUPLE CONNECTIONS
NOTE: Up to four Input Boards may be present; stacked 4 high. Input Board 1 is the bottom board.
Two versions of Input Board s may be found, see Figure 2-7 and Figure 2-7A.
Input Board 1 is used for Input 1 and, if equipped, Input 2. Input Board 2 is used for Input 3 and Input 4, if
equipped. Input board 3 is for Input 5 and Input 6. Input Board 4 is for Input 7 and Input 8.
Connect the positive (+) leg of the thermocouple to terminal 1 and the negative (-) leg to terminal 2 on the Input
Board(s) to be T/C. Terminal block 1 (TB1) is for Input 1, 3, 5, and 7 and terminal block 2 (TB2) is for Input 2, 4, 6,
and 8.
NOTE: INPUT CONDITIONING JUMPERS MUST BE POSITIONED AS SHOWN FOR A T/C INPUT IN EITHER
FIGURE 2-7 OR 2-7A DEPENDING ON WHICH CIRCUIT BOARD IS FITTED. JUMPERS JU7/JU8 MAY BE
MOVED TO THE NARROW SPAN POSITION FOR BETTER RESOLUTION IF THE MAXIMUM TEMPERA-
TURE DOES NOT EXCEED THE UPPER SPAN LIMIT AS SHOWN IN APPENDIX B, PAGE B-1, AND THE
THERMOCOUPLE BEING USED IS J, K, E, or N ONLY.
FIGURE 2-7 FIGURE 2-7A
JU3 JU1
JU11
U6
JU7
+ + - -
1 1 TB1 TB2
JU2 JU5 JU12
JU4 JU6
JU8
JU15 JU16
NOT USED
INPUT
SPAN
NARROW
T, R, S, B
T/C
WIDE
INPUT 2, 4, 6, 8
JU8
INPUT 1, 3, 5, 7
JU7
NOTE: Terminal Block 1, Terminal 1 is on the RIGHT,
Terminal Block 2, Terminal 1 is on the LEFT.
U1
+ + - -
1 1 TB1 TB2
JU5
JU6
NOT USED
INPUT
SPAN
NARROW
T, R, S, B
T/C
WIDE
INPUT 2, 4, 6, 8
JU8
INPUT 1, 3, 5, 7
JU7
JU16
JU7
JU3
JU2
JU15
JU8