Hardware reference guide

Modbus Plus NOM
35013379 11/2011 287
Optical Star Passive Couplers
The AMP Model 95010-4 is a pig-tail option and must be used with an enclosure
(use AMP Model 502402-4, a 19 in rack-mount enclosure, 1.7 in high).
Other Tools
The following table shows other tools that may be needed for fiber optic links.
Cables
It is recommended that you use 62.5/125 μm cable (such as AMP 503016-1, AMP
502986-1, or equivalent) with a maximum attenuation of 3.5 dB/km in most of the
configurations.
NOTE: Modicon recommends using the 990XCA65609 cable.
When passive star couplers are used, 100/140 micron cable (such as AMP503016-
3, AMP502986-3, or equivalent) with a maximum attenuation of 5.0 dB/km is
recommended because higher optical power can be pumped in 100 μm cable and
as a result, greater distance (up to 1 km) between units can be achieved.
NOTE: All cables must have a maximum cable diameter of not more than 3 mm at
the terminal side.
Connections
The following information discusses connecting the NOM25200 on fiber cable,
adding a new mode to the network, and repairing the break in the cable.
NOTE: When a new network is assembled, it is recommended that you connect all
cables before powering up the system. Connect fiber optic cables as described
previously in this section.
Product Part Number Description/Use
3M (Photodyne) Optical
Source Driver
9XT Hand-held optical source driver (requires
a light source)
3M (Photodyne) Optical
Light Source
1700-0850-T 850 nm Light Source, ST Connectors for
9XT
3M (Photodyne) Power
Meter
17XTA-2041 Hand-held Fiber Optic Power Meter
3M Optical Light Source,
660 nm, visible
7XE-0660-J Use with 9XT to troubleshoot raw fiber,
requires FC/ST patch cord
3M FC/ST Patch Cord BANAV-FS-0001 Connects FC connector on 7XE to ST
3M Bare Fiber Adapter,
ST-compatible
8194 Permits use of above source and meter
to test raw fiber (two required)