Advertisement
C C
D D
Battery 1
Battery 1
Battery 2
Battery 2
+
-
-
+
F F
+
Installing the Network Gateway Unit (Continued)
Fuse FP2 T 6.3A H 250V
Fuse FP2 T 6.3A H 250V
+
+
-
-
T H
T H
E R
E R
M
M
C C D D
RED
RED
BLACK
BLACK
WHITE
WHITE
5V DC
5V DC
CONNECTOR
CONNECTOR
AT NGM
AT NGM
RED
RED
BLACK
BLACK
WHITE
WHITE
5V DC
5V DC
CONNECTOR
CONNECTOR
AT I/F BOARD
AT I/F BOARD
28V DC
28V DC
CONNECTOR
CONNECTOR
0V
0V
! !
NO
NO
CONNECTION
CONNECTION
Wiring Connections - Batteries
This procedure only applies if the PSU3A is fitted.
This procedure only applies if the PSU3A is fitted.
CAUTION - ENERGY HAZARD! NEVER short the battery
CAUTION - ENERGY HAZARD! NEVER short the battery
! !
terminals.
terminals.
Use valve-regulated, lead-acid type12V, 12Ah batteries.
Use valve-regulated, lead-acid type12V, 12Ah batteries.
1
1 Externally isolate the mains supply at the third-party-supplied isolation
Externally isolate the mains supply at the third-party-supplied isolation
unit.
unit.
2 Connect the battery supply wiring plug (A) to the power socket (B).
2
Connect the battery supply wiring plug (A) to the power socket (B).
3 Place the batteries temporarily in position (with their terminals outermost)
3
Place the batteries temporarily in position (with their terminals outermost)
and measure from the PSU's 4-way output socket to the rear terminal of
and measure from the PSU's 4-way output socket to the rear terminal of
each battery (i.e. one positive and one negative). Disconnect the leads
each battery (i.e. one positive and one negative). Disconnect the leads
B B
from the output socket. Cut the battery leads supplied to length. Measure
from the output socket. Cut the battery leads supplied to length. Measure
A A
from the socket to a position on the side wall - NOT the top plate - of the
from the socket to a position on the side wall - NOT the top plate - of the
right-hand battery and cut the thermistor lead to length. In both cases
right-hand battery and cut the thermistor lead to length. In both cases
E E
make the leads as short as possible. Reconnect the leads to the socket.
make the leads as short as possible. Reconnect the leads to the socket.
Remove the batteries from the back box.
Remove the batteries from the back box.
4 Connect the red wire (C) to the positive terminal of battery 2 and the black
4
Connect the red wire (C) to the positive terminal of battery 2 and the black
wire (D) to the negative terminal on battery 1.
wire (D) to the negative terminal on battery 1.
5
5 Fit the batteries in the back box. Use a suitable silicon-based sealant to
Fit the batteries in the back box. Use a suitable silicon-based sealant to
secure the thermistor (E) to the side wall - NOT the top plate - of the right
secure the thermistor (E) to the side wall - NOT the top plate - of the right
hand battery.
hand battery.
6
6 Connect the interlink cable (F) between battery 1 positive and battery 2
Connect the interlink cable (F) between battery 1 positive and battery 2
negative terminal. This will power up the NGU, so do this AFTER wiring to
negative terminal. This will power up the NGU, so do this AFTER wiring to
the PCBs has been connected (see following pages).
the PCBs has been connected (see following pages).
7
7 When all wiring connections have been completed, fit the cover to the
When all wiring connections have been completed, fit the cover to the
back box (ensure the interlink cable is not squashed), and then apply
back box (ensure the interlink cable is not squashed), and then apply
power.
power.
Using an External 28V dc Power Supply - Optional
Using an External 28V dc Power Supply - Optional
The external dc power supply must satisfy the ratings given in the section
The external dc power supply must satisfy the ratings given in the section
'NGU Electrical Specifications'.
'NGU Electrical Specifications'. The mains block earth connection must
still be connected to earth
still be connected to earth - see 'Wiring Connections - Mains and Safety
Earth' on the previous page.
Earth' on the previous page.
1
1 Bring the 28V dc cable into the back box via a 20mm knockout. Route the
Bring the 28V dc cable into the back box via a 20mm knockout. Route the
cable behind the chassis, as close as possible to the rear wall of the back
cable behind the chassis, as close as possible to the rear wall of the back
box.
box. Never route the cable across the front of the NGM.
Never route the cable across the front of the NGM.
2
2 Connect the dc supply to the 0V and
Connect the dc supply to the 0V and
TB2 on the PSU3A to Network Interface PCB. The use of 1.5mm cable is
TB2 on the PSU3A to Network Interface PCB. The use of 1.5mm cable is
recommended. See EMC requirements warning below.
recommended. See EMC requirements warning below.
3 Remove the white wire (PSU FAULT) between the PSU3A to Network
3
Remove the white wire (PSU FAULT) between the PSU3A to Network
Interface PCB 5V connector TB1 and the NGM 5V connector. Connect the
Interface PCB 5V connector TB1 and the NGM 5V connector. Connect the
fault output from the external supply to the removed connection at the
fault output from the external supply to the removed connection at the
NGM. (Open circuit = fault, Short circuit to 0V = OK). If the external supply
NGM. (Open circuit = fault, Short circuit to 0V = OK). If the external supply
does not have a fault output, jumper between this removed connection
does not have a fault output, jumper between this removed connection
and the black wire (0V) at the NGM.
and the black wire (0V) at the NGM.
EMC requirements: a ferrite (supplied with the NGU) is
EMC requirements: a ferrite (supplied with the NGU) is
required for the dc power input cable and for the fault signal
required for the dc power input cable and for the fault signal
! !
cable. Fit the ferrite directly under the gland at the back box
cable. Fit the ferrite directly under the gland at the back box
knockout. The screen (if plastic glands are used) and all
knockout. The screen (if plastic glands are used) and all
cores (plastic or metal glands) of the cable must pass
cores (plastic or metal glands) of the cable must pass
through the ferrite.
through the ferrite.
Use of an external dc power supply does not comply with
Use of an external dc power supply does not comply with
EN54 Part 4.
EN54 Part 4.
EN54
EN54
!
!
4
The mains block earth connection must
- see 'Wiring Connections - Mains and Safety
__
__
terminals of the 28V connector
terminals of the 28V connector
! !
997-451, Issue 6 July 2006
2
2
Advertisement
