Siemens ET 200S Manual page 117

Installing Simplex Connectors
1. Remove about 30 cm of the cladding of the fiber-optic duplex cable.
2. Install the fiber-optic duplex cable with the appropriate simplex connectors.
For detailed instructions on installing the simplex connectors, see the SIMATIC
NET PROFIBUS Networks Manual.
Tip: Do not snap the simplex connectors together individually; instead, snap
them together so that you get a "duplex connector". In this manner you will
achieve a better hold in the connector adapter.
IMPORTANT: The cut and polished surface of the plastic fiber must be
absolutely smooth and even. The plastic cladding also must not stick out or be
separated roughly. Each deviation causes strong attenuation of the light signal
over the fiber-optic cable.
3. Put the simplex connector in the plug-in adapter for the IM151-1 FO
STANDARD and the fiber-optic cable in the appropriate cable ducts. Snap the
connector adapter closed so that you can hear clearly that the side units have
made contact with each other.
When placing the connectors in the connector adapter, make sure that you
position them correctly: the transmitter should always be on top and the
receiver should always be on the bottom.
Fiber-optic cable
duplex line
Distributed I/O System ET 200S
EWA 4NEB 780 6024-02 07
Snap the two simplex connectors
together such that you get a "duplex
connector."
Tip: Cut the lower cable about 10 mm shorter
than the upper cable so that you achieve
better arrangement for the wires.
Maximum 30-mm bending radius
Wiring and Fitting
Connector
adapter for
the IM151-1 FO
STANDARD
5-21