Communications; Serial Communications Specification - Extech Instruments S4500THS User Manual

Portable Printing Solutions
3.3 C
OMMUNICATIONS
The S4500THS Printer is able to support two modes of communication
simultaneously – Either RS232 and IrDA (If Dip switch # 1 is ON) or
RS232 and 802.11b or Bluetooth (If Dip switch # 1 is OFF and Dip Switch
# 2 is ON).
Dip Switch # 2 is used to control the RS232 Port. If the Switch is turned
ON the RS232 port is disabled and if it is turned OFF the RS232 Port is
enabled. If RS232 interface is not required, disabling the port will save
battery power.
Bluetooth or 802.11b RF communication is available if optional daughter
boards are installed (802.11b). The printer can have either Bluetooth or
802.11b enabled but not both of them at the same time.
3.3.1 S
ERIAL
The RS232C Interface signals for the S4500THS Series printers are

terminated on a 6 PIN RJ type data connector located on the side of the
printer.
Six connections are provided from the Serial Interface to the host computer.

The TABLE 3 below lists the Serial Interface signals and pin outs on the RJ
connector and the connector pin locations are shown in
10
FIGURE 7.
A minimum of two connections are required for operation:

RXD – pin 3 and Common – pin 1
The communication Parameters: Baud rate, Data Bit and Parity must be set

same as the host device settings.
T
Extech Instruments Corporation 285 Bear Hill Road, Waltham, MA 02451-1064 Phone: 1-877-4-EXTECH (439-8324) Fax: (781) 890-7864 Web site: www.extech.com
Copyright © 2005 Extech Instruments Corporation. All rights reserved including the right of reproduction in whole or in part in any form.
:
C
OMMUNICATIONS SPECIFICATION
RJ D
ATA
F
IGURE
RJ25 Connector
Functional Description
Pin Number
3 RS232 from Host (INPUT)
2 RS232 from Printer (OUTPUT)
6 Request to send from Host (INPUT)
4 Clear to from Printer (OUTPUT)
1,5 Logic common
3 - 4500THS P
ABLE
:
C S
ONNECTOR HOWING
N L
UMBER OCATIONS
F V
RONT IEW
7 - RJ D C
ATA ONNECTOR
' S RS232C I
RINTERS ERIAL
S4500THS User Guide
P
IN
Signal Name
RXD
TXD
RTS
CTS
COM
S
NTERFACE IGNALS