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Channel 1
Network Comms
J3 To/from
Fibre-optic
J1 J2
J1
PCB
WO1
FO1
FO2
J6 RS232 connection:
to Isolated RS232 Board
(using direct ribbon cable)
or to IDR-6A repeater
(using cross-over ribbon cable)
Installing the Network Gateway Unit (Continued)
CONNECTION BETWEEN TWO
CONNECTION BETWEEN TWO
NETWORK PCBs
NETWORK PCBs
A A
B B
A A B B
Channel 2
Network Comms
J4 DC Power
J2
(pre-wired)
WO2
SW1
Wiring Connections - Network PCB (NGM)
Network cables - Conventional wire cables are terminated at connectors J1
Network cables - Conventional wire cables are terminated at connectors J1
(Channel 1) and J2 (Channel 2). Fibre-optic cable connections are made using
(Channel 1) and J2 (Channel 2). Fibre-optic cable connections are made using
the optional Fibre-optic interface PCB (see following pages).
the optional Fibre-optic interface PCB (see following pages).
Cables are to be brought into the back box using 20mm knockouts and
Cables are to be brought into the back box using 20mm knockouts and
appropriate glands - (refer to the panel's Installation & Commissioning
appropriate glands - (refer to the panel's Installation & Commissioning
manual) in accordance with local standards. Cable shields MUST be
manual) in accordance with local standards. Cable shields MUST be
terminated at the gland or back box using the optional earthing blocks (PN:
terminated at the gland or back box using the optional earthing blocks (PN:
020-453).
020-453).
EMC requirements: a ferrite (supplied with the NGU) is
EMC requirements: a ferrite (supplied with the NGU) is
required for each conventional wire network cable. Fit the
required for each conventional wire network cable. Fit the
! !
ferrite directly under the gland at the back box knockout. The
ferrite directly under the gland at the back box knockout. The
screen (if plastic glands are used) and both cores (plastic or
screen (if plastic glands are used) and both cores (plastic or
metal glands) of the cable must pass through the ferrite.
metal glands) of the cable must pass through the ferrite.
Connect terminal A to A and B to B.
Connect terminal A to A and B to B.
Jumper Link Setting
Jumper Link Setting
If cables are connected at J1 and/or J2, ensure jumper links are fitted as
If cables are connected at J1 and/or J2, ensure jumper links are fitted as
follows:
follows:
Channel 1 - WO1
Channel 1 - WO1
Channel 2 - WO2
Channel 2 - WO2
When using fibre-optic cables, ensure jumper links are fitted in the following
When using fibre-optic cables, ensure jumper links are fitted in the following
positions instead:
positions instead:
Channel 1 - FO1
Channel 1 - FO1
Channel 2 - FO2
Channel 2 - FO2
Note: For further details refer to the Fibre-optic PCB installation instructions.
Note:
For further details refer to the Fibre-optic PCB installation instructions.
Earth Fault Monitoring (EFM)
Earth Fault Monitoring (EFM)
No action needs to be taken at the NGU as EFM must be set at the
No action needs to be taken at the NGU as EFM must be set at the
adjacent panels. Ensure that jumper links JP1 and JP2 are NOT fitted.
adjacent panels. Ensure that jumper links JP1 and JP2 are NOT fitted.
Note: If an external dc power supply is used, and the external supply has its
Note: If an external dc power supply is used, and the external supply has its
0V connected to mains earth, the earth fault monitoring circuit will detect a
0V connected to mains earth, the earth fault monitoring circuit will detect a
fault.
fault.
5
997-451, Issue 6 July 2006
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