How Do the Pins Map from the SLSC Side of an RTI to the DUT Side Connectors?

Updated Aug 19, 2025

Issue Details

I am using an SLSC-12202 and see in the Getting Started Guide that the Vsup signals can be connected to the rear of the card through the XJ4 connector:

However, when I look at the JH1 pinout on the RTI-12308, it doesn't mention which contacts match up to the XJ4 connector. How do I know where to wire these signals?

 

Solution

The pins on the XJ4 connector on the rear of any SLSC card go from A at the bottom of the connector to F at the top. The pins on the JH1 connector on a Rear Transition Interface (RTI) go from 1 at the bottom-right to 6 at the top-left. 

For RTIs and SLSC cards that have 8 pins on the XJ4 and JH1 connectors, the pin mappings would be A-I and 1-8, respectively, but would follow the same pattern as the SLSC-12202 and RIT-12308.

The signals on the SLSC-12202 could be mapped as follows:

 

SLSC-12202 SignalXJ4 Connector PinJH1 Connector PinRTI-12308 Signal
Vsup_0F6V1+
COME3V1-
Vsup_1D5V2+
COMC2V2-
No ConnectionB4V3+
NC ConnectionA1V3-

 

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