SSI Wiring

Note: When positive voltage is sent to an axis’s drive, the axis must extend. The extend direction is defined as the direction that causes the transducer to return increasing counts.

Use shielded twisted pairs for all connections to inputs and outputs. Route the transducer wiring separate from other wiring. You must provide the power supplies needed by your transducers.

RMC SSI Input

Six-Pin Plug-in Terminal Block

Pin	Function
1	SSI Axis + Clock
2	SSI Axis - Clock
3	SSI Axis Common
4	SSI Axis + Data
5	SSI Axis - Data
6	Case

SSI uses differential line driver (RS422) clock and data signals. Connect both the +Clock and Clock between the RMC and transducer for the clock signal, and both the +Data and Data between the RMC and transducer for the data signal.

The power (+24V) and ground is not provided by the RMC, and therefore must be provided externally to the transducer.

Connect the transducer DC ground to SSI Cmn.

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RMC Drive Outputs

Four-Pin Plug-in Terminal Block

Pin	Function
1	Axis 0 Drive
2	Drive Common
3	Axis 1 Drive
4	Case

When positive voltage is sent to an axis’s drive, the axis must extend. The extend direction is defined as the direction that causes the transducer to return increasing counts.

CAUTION: If the outputs from the RMC are reversed, the axis will be uncontrollable when power is connected. Confirm that your wiring is correct!