Omron LCM100 manual Appendix a, RS-232 Connector Pin Assignments

DATA-LINC GROUP

Appendix A

RS-232 Connector Pin Assignments

LCM100 User’s Guide

Both modules of the LCM100 have female DB-25 connectors which can be directly connected to DTE and DCE equipment. All output levels are a minimum of +6 volts when active and a maximum of –6 volts when inactive, measured in a 3k ohm load. Inputs will sink 10Ma and have a typical turn-on threshold of +1.25 volts and a turn-off threshold of +0.8 volts.

J2
Pin	Description
1	Ground
	In the RS-232C environment, this line provides a safety frame ground for
	RS-232 equipment.
2	Transmit Data (Output)
	This line transfers data to the RS-232C device.
3	Receive Data (Input)
	This line accepts data input from the RS-232C device.
4	Request to Send
	Request to send output; indicates that the terminal is ready to transmit data.
	This line is enabled, pulled up to +12 volts through a 4.7K ohm resistor.
5	Clear to Send
	Clear to Send input; acknowledges that the terminal may begin
	transmission. This line is enabled, pulled up to +12 volts through a 4.7K ohm
	resistor.
6	Data Set Ready
	Data Set Ready input; acknowledges that the remote device is on and
	operational. This line is enabled, pulled up to +12 volts through a 4.7K ohm
	resistor.
7	Signal Ground
	This line provides a common signal connection.
8	Carrier2 Detect (Output)
	This line is a high level (+12 VDC) when carrier is detected, and a low level
	(-12 VDC) when carrier is not detected.

PN 161-09998-001A 6