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SROUT
4.
4.1.
4.2.
10
Router Option Card for Lon® Star Coupler
RER 111
Interfaces
General
The router option card has five separate interfaces:
- a 64-pin E1 card connector for the connection to the mother board of the
RER 111 unit
- a fibre-optic transceiver pair
- a 9-pin D-type female connector for transformer-isolated twisted pair connection
- a service switch
- a 40-position SIMM connector for the RTR-10 core module.
Twisted pair interface
A 9-pin D-type female connector is used for the transformer-isolated twisted pair
interface. In the picture below the connector is viewed from the outside, looking into
it. The contacts are on top of the connector with pin 1 on the left hand side.
5
4
3
2
9
8
7
6
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Table 4.2.-1 The pin designations for the twisted pair interface
Pin
Signal
1
Net A
2
Net B
For the communication cable specifications regarding the twisted pair network, refer
to the document "Junction Box and Wiring Guidelines For Twisted Pair L
Networks", August 1994. Echelon Corporation.
If a shielded cable is used, the protective shield should be connected to the casing of
the D-type connector. The connector of the option card is earthed to the case of the
RER 111 unit. Figure 4.2.-2 below illustrates the connection of the protective shield
to the cable connector.
The cable connector has to be made of a conductive material.
Protective shield
Conductive casing
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1
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Description
Signal line
Signal line
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1MRS 750109-MUM
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ABB Automation
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