Northern Telecom Meridian SL-1 Installation Manual page 50

2-42 Installation and connections
Chart 2-9 Continued
QCAD321 JUNCTION BOX ASSEMBLY INSTALLATION
STEP PROCEDURE
11 Insert the wires through the lock nut and secure the 90° elbow to the cabinet. Ensure
that the locking teeth on the nut are facing downward against the cabinet metal.
12 If previously removed, reinstall the SDI port.
13 Disconnect and remove the red and black wires going from TB3 at the rear of the -48 V
rectifier to TB1 at the rear of the QUX19 unit (Fig. 2-9) or QUX21 unit (whichever is
equipped).
Note: Do not discard these wires as they are required if the batteries are removed at a
future date.
14 Connect the power and control wiring from the QCAD321 junction box as follows (see
Fig. 2-9):
Connect the long black and red wires (designated wires 1 and 2) equipped with ring
lugs to terminals 1 and 2 of TB3 on the QRF12 rectifier.
Remove straps between +OUT and +SENSE and -OUT and -SENSE terminals of TB4
on the QRF12 rectifier.
Connect the black and red wires equipped with spade tip connectors to +SENSE (black
wire to terminal 2) and -SENSE (red wire to terminal 3) terminals of TB4 on the
QRF12 rectifier.
Connect the two black and red wires not equipped with connectors (bare-ended) to the
R (1) and BK (2) terminals of TB1 at the rear of the QUX19 or QUX21 power unit
(whichever is equipped). Ensure that the connections are secure.
Connect the white wire equipped with two spade tip connectors (designated DCON) to
DCON connection of TB4 on the QRF12 rectifier and extend to terminal 3 of TB2 at
the rear of the QUX19 or QUX21 power unit (whichever is equipped).
Connect the remaining green wire to the GRD 1A lug on the ground bar at the rear of
the cabinet.
15 Remove assigned DISCHARGE fuse from the QBL15 battery distribution box (Fig. 2-
14).
16 Install and connect a 4 AWG red wire between the CHARGE bus in the QBL15 and
terminal 1 of terminal block TB1 in the QCAD321 junction box (Fig. 2-14 and 2-15).
Appendix 1 to 553-2601-200
Chart Continued