OSD138 Universal Fibre Optic Data Modem Item Number: 159-0251/4
Installation guide
1
Description
The following is the installation guide for the fibre optic
modems into the Ampac FireFinder and FireFinder
PLUS Fire Detection Control and Indicating Equipment
(FDCIE).
The fibre optic modem used is an OSD138.
There are 4 kits available –which depend on the
number of fibre connections available between FDCIE
panels and the type of fibre (singlemode or multimode)
available.
Warning and Precautions
Optical Output Operation
The multimode version of the OSD138 is a
Class 1 LED product. Wavelength of
850nm and <-8dBm power output.
The single mode and WDM
versions of the OSD138 are
Class 3A laser products.
Wavelength of 1310nm and
<+5dBm power output or wavelength of 1550nm and
<+7dBm power output.
Precautions
➢All service personnel should be provided training
as to the hazards of direct viewing of laser
radiation and the precautionary measures during
serving of equipment.
➢Areas where laser products are installed should be
restricted in access to trained service personnel
only and appropriate warning signs posted in the
work area
➢All laser apertures should be covered by protective
covers when not connected to optical fibres. Never
leave outputs uncovered.
➢Laser equipment should be positioned above or
below eye level where possible. Apertures should
be positioned away from personnel
➢Protective eyewear should be worn in the vicinity
of laser equipment
Installation
Observe anti-static precautions at all times
1. Power down the FACP, disconnect the batteries
2. Mount the Modems in an appropriate position on
the backpan. Observing all precautions
3. Connect 27VDC from an Aux Power connector
inside the FDCIE system to the Power Connector
of the OSD138 Modem. Note: Pin 1 +ve Pin 2 0V
(see Figures 5 - 12). Note will depend on which
OSD138 used
4. Connect the COMMS from the Network Interface
Card (NIC) to the OSD Communication Connector.
There are 3 different NIC configurations available –
see following wiring diagrams
5. Set the Data mode control switch as outlined in the
appropriate wiring diagram
6. Terminate the Optical Fibre with the appropriate
optical connector. Before connection inspect the
ends of the connectors to ensure no dust or dirt is
present as it could contaminate the modem
connector and result in poor performance. If it
necessary to clean the cable connectors, use
isopropyl alcohol and the lint free tissue to remove
contamination.
7. Power up the FACP, connect the batteries and
test.
