Ampro Corporation PCI-104 quick start Signal From Description Pin # Onboard DB9 Connector

Appendix B I/O Interface Board

Table B-5 lists the connections on the I/O Board between Serial Port 2 connector (J7A) and the Utility 1a interface connector (J4) or other connections on the board.

Table B-5. Serial Port 2 (COM2) Interface Pin/Signal Descriptions (J7A)

J7A	Signal	From	Description
Pin #		Onboard
(DB9)		Connector
		& Pin #
1	DCD2*	J4-11	Data Carrier Detect 2 – Indicates external serial device is detecting a
			carrier signal (i.e., a communication channel is currently open). In
			direct connect environments, this input is driven by DTR2 as part of
			the DTR2/DSR2 handshake.
2	RXD2	J4-13	Receive Data 2 Input – This line is typically held at a logic 1 (mark)
			when no data is being transmitted, and is held “Off” for a brief
			interval after an “On” to “Off” transition on the RTS2 line to allow
			the transmission to complete.
3	TXD2	JP1-2	Serial Transmit Data 2 Output – The signal on this line comes from
		(J4-15, or	J4-15 or J4-20 thorough the only jumper (JP1) on the I/O Interface
		J4-20)	Board.
			TXD2 signal – This signal (J4-15) is available if jumper JP1 on the
			I/O Board is set to pins 1-2 (default setting). This line (TXD2) is
			typically held to a logic 1 when no data is being sent. Typically, a
			logic 0 (On) must be present on RTS1, CTS1, DSR1, and DTR1
			before data can be transmitted on this line.
	TTL		TTL signal – This signal (J4-20) is available if jumper JP1 on the
			I/O Board is set to pins 2-3.
4	DTR2*	J4-17	Data Terminal Ready 2 – Indicates port is powered, initialized, and
			ready. Used as hardware handshake with DSR2 for overall readiness.
5	GND	J4-19	Ground
6	DSR2*	J4-12	Data Set Ready 2 – Indicates external serial device is powered,
			initialized, and ready. Used as hardware handshake with DTR2 for
			overall readiness to communicate.
7	RTS2*	J4-14	Request To Send 2 – Indicates serial port is ready to transmit data.
			Used as hardware handshake with CTS2 for low level flow control.
8	CTS2*	J4-16	Clear To Send 2 – Indicates external serial device is ready to receive
			data. Used as hardware handshake with RTS2 for low level flow
			control.
9	RI2*	J4-18	Ring Indicator 2 – Indicates external serial device is detecting a ring
			condition. Used by software to initiate operations to answer and
			open the communications channel.

Notes: The shaded area denotes power or ground. The signals marked with * = Negative true logic.

CoreModule 800 QuickStart Guide 29