Metrologic Instruments MLPN 2358 manual Pin Assignments for the MCA951 DEC9S

Pin Assignments for the MCA951 (DEC9S)

Located on the MCA is a 9-pin female D-type connector used to connect the MCA to the host device. The output signals on the 9-pin host end of the MCA are dependent upon which version of the scanner that is being used. The following is a list of the pin assignments for the different versions:

Version “9” (OCIA)		Version “11” (46XX)
Pin	Function	Pin	Function
1	OCIA Shield Ground	1	Shield Ground
2	RDATA	2	RS-232 Transmit Output
3	RDATA Return	3	RS-232 Receiver Input
4	Clock Out	4	IBM 4680 -B
5	Power/Signal Ground	5	Power/Signal Ground
6	Clock Out Return	6	IBM 4680 +A
7	Clock In Return	7	Clear to Send Input
8	Clock In	8	Request to Send Output
*9	+5VDC Power to Scanner	*9	+5VDC Power to Scanner

Version “14” (232)		Version “15” (LTPN)
Pin	Function	FuPinction
1	Shield Ground	1	Shield Ground
2	RS-232 Transmit Output	2	RS-232 Transmit Output
3	RS-232 Receiver Input	3	RS-232 Receive Input
4	Data Terminal Ready Input	4	Light Pen Source (+5V Input)
5	Power/Signal Ground	5	Power/Signal Ground
6	Data Set Ready Output	6	Light Pen Data (Output)
7	Clear to Send Input	7	Clear to Send (Input)
8	Request to Send Output	8	Request to Send (Output)
9	+5VDC Power to Scanner	*9	+5VDC Power to Scanner

*When the host supplies power to the scanner, this is the pin assignment for the +5VDC for the scanner. If, in the application, the host device will supply the power necessary for the scanner, reposition an internal jumper within the MCA and plug the 4 position ground jumper to the power supply connector for FCC and ESD purposes. (Refer to Scanner Installation: Powered by External Power Supply page 5).

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