Plastic Core Fiber Optic Cable; Glass Core Fiber Optic Cable; Fiber Optic Interface Connections - Mettler Toledo IND500x Installationsanleitung

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2.5.7.2 Plastic Core Fiber Optic Cable

For very short distances up to 40m (130 ft), a plastic core fiber optic cable is available. This cable is available
with connectors already installed on each end or is available in bulk and a termination kit can be used for
connection in the field. Please refer to the appropriate price pages and catalogs for available lengths and part
numbers.

2.5.7.3 Glass Core Fiber Optic Cable

Cable lengths longer than 40m (130 ft.) require use of a hard clad silica (glass) core cable. This cable
requires special tools to properly install connectors so field termination of the cable is not recommended.
If necessary, cables can be coupled using a special optic coupler, but the coupler signal loss is equivalent to
150 m (500 ft.) of cable. When one coupler is used the useable distance is reduced to 150 m (500 ft.)

2.5.7.4 Fiber Optic Interface Connections

The following instructions describe fiber optic cable connections to the terminal. Refer to the technical manual of
the other connected device for details on connecting the other ends of the cables.
1 Make certain that power is removed from the terminal.
2 For the harsh enclosure, feed the ends of the fiber optic cables through the split bushing of the correct cable
gland (identified in [Main PCB Page 9]) until the cable reaches the fiber optic interface board - approxi-
mately 90 mm (3.5 in.). The COM5 cables should enter through cable gland closest to the corner of the
enclosure and the COM4 cables should enter through the cable gland beside the COM5 gland.
Figure 46: Split Grommet for Fiber Optic Cables
3 Be sure the fiber optic cable is not bent to less than a 15 mm (0.59 inch) radius. Any sharp kinks in the
fiber optic cable will damage it and then the cable must be replaced. Coil any excess cable neatly in large
loops close to the IND500x or other device and secure it so it does not get damaged.
4 When installing a fiber optic cable, the connectors on the end of the cable will snap into the transmitter or
receiver on the interface board. Grasp the connector only (not the cable) when inserting or removing. Only
gentle pressure is required. Some typical wiring schemes are listed in Control Drawings #30595335.
5 On the harsh enclosure terminal, after all fiber optic cables have been connected, tighten the compression
nuts on the outside of the harsh enclosure cable glands to secure the fiber optic cables.
See also
Main PCB Page 9
IND500x
W1/W3 W2/W4
Closed Closed
Jumper Position
Installation​ ​ 41