Connect Tech 104 External Power Connector Pinout P8 Signal Direction, External Power Connection

Connect Tech FreeForm/PCI-104 User Manual

RS-485 Headers (P5, P6)

Table 6: RS-485 Port 1 Pinout (P5)

Pin	Signal	Direction
1	RXD+1	Input
2
3	RXD-1	Input
4
5	TXD+1	Output
6
7	TXD-1	Output
8
9	GND	power
10

External Power Connector (P8)

Table 7: RS-485 Port 2 Pinout (P6)

Pin	Signal	Direction
1	RXD+2	Input
2
3	RXD-2	Input
4
5	TXD+2	Output
6
7	TXD-2	Output
8
9	GND	power
10

The external connector provides 5V to the power regulation circuitry. In addition, the power connector enables the 3.3V regulator and provides VIO to the PCI Bridge.

The external power connector should only be used when the FreeForm/PCI-104 is being programmed out side of a PCI / PCI-104 system.

Table 8: External Power Connector Pinout (P8)

Pin	Signal	Direction
1	5V	Power
2	3.3 enable (connect to 5V)	Input
3	VIO (connect to 5V)	Power
4	GND	Power

It is recommended that a Connect Tech Inc. FreeForm/PCI-104 power supply is used. Orientation of the power supply connector is important. Ensure that the clip on the cable aligns with the catch on P8, as shown below.

Figure 3: External Power Connection

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