Installation guide

RS-422 SINGLE-POSITION JUNCTION BOX (J-BOX) 8000-2573-20, REV. H
INSTALLATION GUIDE 5 of 10
Connecting AC Power
The J-box comes wired for 120Vac and has a 2m
(6ft-7in) SJT 3-conductor power cord attached.
Plug the cord into a dedicated 24-hour,
unswitched outlet.
If the box is to be driven by 240Vac, then the
power cord (if used) and jumpers across the
primary winding of the transformer within the box
will have to be changed (Figure 6).
CAUTION: Use only regulatory-approved
polarized power cords.
Hardwiring the J-Box
If the box is to be hardwired to the ac source, then
the chassis within the box and the power cord will
have to be removed to facilitate connection. Refer
to Figures 5, 6, and 13 for how to remove these
parts.
CAUTION: Keep the disconnect device (circuit
breaker) readily accessible when hardwiring J-box.
Do the following:
1. Unplug line cord from ac outlet.
2. Loosen two screws, then slide and lift circuit
board assembly to remove and access ac
connections (Figure 5).
Figure 5. Accessing connections
3. Disconnect ac power cord from TB1 (Figure 6).
4. Loosen four screws to detach chassis.
5. Detach strain relief securing cord and remove
cord (if necessary, refer to Figure 13).
Figure 6. Transformer compartment detail
L1
N / L2
GND
24V
12V
0V
GND
120V
0V
120V
0V
Power On/Off
Switch
TB1
Red
Red
Blk
Blk
1
2
3
4
Transformer
Transformer Primary
Jumper Settings
120Vac
240Vac
1-3, 2-4
2-3
Chassis Connections AC Line Connections
Color Pin Function Pin Function
Green/
Yellow
E1 Ground E1 Ground
Black 2 Neutral (N / L2) 2 Neutral (N / L2)
Black 3 Line (L1) 3 Line (L1)
Loosen screws, then
slide and lift PC board
assembly to remove.
TB1
Chassis
Screws (4)