Installing the Kit PSU7A Assembly in a Back Box (Continued)
3
11
22
IF PSU7A IS A REPLACEMENT FOR 'OLD'
VERSION WITH INTEGRAL MAINS LEAD: Remove
the existing mains terminal block and use its screw to
fit terminal block of mains cable PN: 082-254 in its
place. The cable has a factory-fitted clip which must
be affixed to the side wall of the back box (at the
marked cross-hairs - see illustration at right).
YOU MUST ALSO MAKE THE SAFETY
EARTH CONNECTION (K to L).
IF PSU7A IS A REPLACEMENT FOR 'OLD'
VERSION WITH INTEGRAL MAINS LEAD: Remove
the existing mains terminal block and use its screw to
fit terminal block of mains cable PN: 082-254 in its
place. The cable has a factory-fitted clip which must
be affixed to the side wall of the back box (at the
marked cross-hairs - see illustration at right).
YOU MUST ALSO MAKE THE SAFETY
EARTH CONNECTION (K to L).
!!
230 VAC,
50/60 Hz
H
I
E
L
G
J
F
K
M
NN
LL
MF: 5A (T) 250V HRC
MF: 5A (T) 250V HRC
LL
NN
230V (a.c.), 5A
230V (a.c.), 5A
1
The 230VAC mains input wiring (H) must be
terminated at the mains termination block (I) in the
top right-hand side of the Back Box. The PSU mains
cable (E) is factory-fitted to the termination block.
Push the mains cable's connector into the socket on
the PSU7A. Pull tight the cable clip at the side of the
back box.
2
The blade connector (G) to the left of the terminal
block is also used to earth the main chassis; the
other end of this earth lead (J) connects to the main
chassis rear enclosure earth terminal. The safety
earth is provided by a short factory-fitted lead (K)
from the mains termination block to the blade
connector (L) on the Back Box side wall. This blade
connector is also used to earth the DTP/Booster
module earth lead (M).
Mains and Safety Earth Wiring
Connections
!!
Note:
Connections to the DTP/Booster module kit are shown
on the instruction sheet (997-267-000-X) supplied with
that kit.
Note:
All blade connections to earth
incorporate a locking barb. To make a
connection push the shrouded
receptacle on to the earth blade (1). To
remove this connection, pull the
shroud (2), NOT the earth wire.
WARNING. Risk of electric shock. Before working
on mains connections, ensure the mains power
supply to the panel is disconnected.
Segregate mains wiring from all other wiring.
TRANSIT CABLE CLIP: Before proceeding, CAREFULLY cut
the cable clip that secures the ferrite cable loop to the front of
the back box. DO NOT cut the cable clip that secures the
mains cable to the side of the back box.
TRANSIT CABLE CLIP: Before proceeding, CAREFULLY cut
the cable clip that secures the ferrite cable loop to the front of
the back box. DO NOT cut the cable clip that secures the
mains cable to the side of the back box.
'X'
230 VAC,
50 Hz
H
I
E
C
J
M
K
NN
LL
MF: 5A (T) 250V HRC
MF: 5A (T) 250V HRC
LL
NN
230V (a.c.), 5A
230V (a.c.), 5A
VIEW
X
F
Connections in 'original' back box
1
The 230VAC mains input wiring (H) must be terminated at the
mains termination block (I) in the top right-hand side of the
Back Box. The PSU mains cable (E) is factory-fitted to the
termination block. Push the mains cable's connector into the
socket on the PSU7A. Pull tight the cable clip at the side of
the back box.
2
One of the blade connectors is used to earth the main
chassis; the other end of this earth lead (J) connects to the
main chassis rear enclosure earth terminal. The safety
earth is provided by a short factory-fitted lead (K) from the
mains termination block to the another of the blade
connectors. The fourth blade connector is used to earth the
DTP/Booster module earth lead (M).
Connections in 'revised' back box
Note:
Connections to the DTP/Booster module kit are shown
on the instruction sheet (997-267-000-X) supplied with
that kit.
997-277-000-9, Issue 9 February 2010
