West Control Solutions MRC 9000 - Manual (Page 31)

Section 2 2-12 Edition 3
Rev G
2.3.7 CURRENT 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 2-10 and Figure 2-10A.
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 positive (+) leg to terminal 1 and connect negative (-) leg to terminal 2 on the Input Board(s) to be
current input. Terminal block 1 (TB1) is Input 1, 3, 5, and 7 and terminal block 2 (TB2) is Input 2, 4, 6, and 8.
Installation of an appropriate shunt resistor is NOT REQUIRED. Positioning JU15/16 properly connects the
appropriate shunt resistor that is populated on the Input Board.
NOTE: INPUT CONDITIONING JUMPERS MUST BE POSITIONED AS SHOWN FOR CURRENT INPUT IN
EITHER FIGURE 2-8 OR 2-8A DEPENDING ON WHICH CIRCUIT BOARD IS FITTED. ALSO NOTE: THERE
IS NO SENSOR BREAK DETECTION FOR ZERO BASED CURRENT INPUTS. EXAMPLE: 0-20MA.
FIGURE 2-10 FIGURE 2-10A
JU3 JU1
JU11
U6
JU7
+ + - -
1 1 TB1 TB2
JU2 JU5 JU12
JU4 JU6
JU8
JU15 JU16
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
JU16
JU7
JU3
JU2
JU15
JU8