PEP Modular Computers Modular Computers RS485 - SPI Connectors (ST5 and BU1)

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SMART I/O User’s Manual

Chapter 3 SMART-EXT

3.4.3 SPI Connectors (ST5 and BU1)

On both sides of the board are standard 2x5 pinrow connectors (BU1, ST5),

that provide the interface connection between SMART-EXT units and the

SMART-BASE.

A 10-wire flat cable is soldered directly on the left-hand side of the board

(BU1), that interfaces the SMART-BASE module or other (earlier cascaded)

SMART-EXT modules.

Pinouts for this 10-pin connector

Note

Pin 10 of BU1 is only useful on the first SMART-EXT connected to the

SMART-BASE. For this reason, SMART-Modules utilizing this feature

can only be connected to the first slot of the first extension unit.

Pin Nr. Signal Pin Nr. Signal

1 System VCC (+5V) 2 Serial RxD from SMART-BASE

3 System VCC (+5V) 4 Serial TxD from SMART-BASE

5 Serial Ext. Select 6 Serial CLK from SMART-BASE

7 System GND 8 Reset (Power ON/OFF)

9 System GND 10 (BU1)

Serial Ext. Interrupt

(INT4 1st Module only)

10 (ST5) N/C