Baldor mn1854 9 & 25 Pin RS-232 Cable Connections for UL Installations, RS-232 PC Connections

7 to 8 4 to 5

4 to 6 6 to 20

RTS to CTS DSR to DTR

RS–232 PC Connections

A null modem connection must be made between the LinStep+ and the computer COM port. This will ensure that the transmit and receive lines are properly connected. Either a 9 pin or a 25 pin connector can be used at the computer, Figure 3-6. Maximum recommended length for RS232 cable is 6 ft. (1.8 meter).

Figure 3-6 9 & 25 Pin RS-232 Cable Connections for UL Installations

9 Pin Connector

RS232 Connector

N/A	LinStep+
N/A	(DCE)
N/A

Rx

Tx

Com

Connector location is shown in Figure 3-4.

RXD– 4		RXD	Computer	Pin	Signal
			COM	2	RXD
TXD – 5		TXD
			Port	3	TXD
Com – 6		GND		5	GND
			(DTE)
Chassis				25 Pin Connector
If required, RTS, CTS, DSR and DTR may also				Pin	Signal
be connected for a full null modem connection.				2	RXD
Jumper	9 Pin	25 Pin		3	TXD
				7	GND

Figure 3-7 9 & 25 Pin RS-232 Cable Connections for CE Installations

RS232 Connector

Control RXD

Computer

RXD COM

(DCE)

TXD

TXD Port

GND

PEPE

GND (DTE)

Note: For CE installations, connect the overall shield at each end of the cable to PE. The voltage potential between the PE points at each end of the cable must be Zero Volts.

MN1854 Receiving & Installation 3-7