coupler is possible. The Mini-Starcoupler has a plastic housing that can
be snapped onto a DIN EN 50022 rail. The auxiliary power supply is fed
in via terminals on one side of the housing. Because of its extremely
wide auxiliary voltage range (DC 24 - 250 V and AC 60 - 250 V), the
Starcoupler can be connected without switchover to all common types of
station batteries and AC mains voltage supplies.
The readiness for service of the unit is indicated by means of a potential-
free signalling contact (terminals 1,2) that can be used to communicate
the following fault conditions to a control center:
•
No supply voltage
Failure of internal power supply
When a fault condition is present, the contact is closed.
2.4 Data
Transfer
Operation of the mini star coupler is transparent and full-duplex. Data
received from the master unit are forwarded by the receiver of channel
1 to all outputs (channels 2, 3, 4 and 5). Data from one of the outputs
(channel 2, 3, 4 and 5) are sent to the transmitter of channel 1. The logic
of the optical interfaces is positive (Light OFF in idle state), incoming
light signals are treated as active = 1 (high). For use in systems
operating
with a negative logic, the star coupler can be switched over to negative
logic by means of a switch that is accessible from outside. Inversion of
the logic applies to both the optical input and the optical output of this
interface. On delivery, the star coupler is set to positive logic (Light OFF
in idle state). When set to negative logic, the receiver must have light in
idle state, otherwise the star coupler is blocked.
19.10.2006
Mini-Starcoupler
Page 9 of 28
