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PCL-741Isolated Dual PortRS-232/Current-LoopInterface Card

6 PCL-741 User's Manual

Chapter 2 Hardware Installation 72HardwareInstallationCHAPTER

8 PCL-741 User's ManualInitial InspectionDepending on the option you ordered, you should find (in addition tothis manual) the following items i

Chapter 2 Hardware Installation 9Jumper and Switch Location

10 PCL-741 User's ManualCard ConfigurationEach port of the PCL-741 card has four associated status jumpergroups and one six position DIP switch

Chapter 2 Hardware Installation 11Default SettinosThe board will be shipped in the RS-232 mode, the jumpers on the10*3 pin jumper will be set

12 PCL-741 User's ManualProtocol SelectionFirstly you have to decide which mode each port will be operating in,RS-232 or current-loop driver mo

Chapter 2 Hardware Installation 13You may configure both the Tx and Rx on one port to operate in thesame mode, or you can configure each Tx a

The required switch settings for various base addresses are as shownbelow:Port base address (SW1 or SW2)Base address A3 A4 A5 A6 A7 A8200-207 ●●●●●●20

Interrupt Level (IRQ) SettingThe PCL-741 card is designed to access interrupt levels 3 up to level15 with the exception of 6, 8, 13, and 14. If the ca

Part No. 2000740010 2nd EditionPrinted in Taiwan June 2001Copyright NoticeThis documentation and the software included with this product arecopyr

16 PCL-741 User's Manual6.Carefully grasp the upper edge of the PCL-741 card. Align thehole in the retaining bracket with the hole on top of th

Chapter 3 Wiring 173WiringCHAPTER

18 PCL-741 User's ManualwiringRS-232 Signal wiringSince the RS-232 interface is not strictly defined, many devices havetheir own connection met

Chapter 3 Wiring 19Modem connectionsPCL-741: DB-9 Male Modem (DCE)Pin Signal Pin Signal3 TxD 2 RxD2 RxD 3 TxD7 RTS 4 CTS8 CTS 5 RTS6 DSR 6 DT

20 PCL-741 User's ManualThe maximum length of a RS-232 cable is 100 ft. If you need toconnect over longer distances7 (longer than 100 h), pleas

Chapter A PC I/O Address Reference 29APC I/O AddressReferenceCHAPTER

30 PCL-741 User's ManualAPPENDIX B PC 1/0 Address usageThe following table indicates the PC I/O address usage assignrnent.To prevent conflictin

ContentsChapter 1 Introduction ... 1Description ...

Chapter 1 Introduction 11IntroductionCHAPTER

2 PCL-741 User's ManualDescriptionThe PCL-741 card provides two isolated RS-232 or current-loopserial ports for communication applications in d

Chapter 1 Introduction 3Features Two independent RS-232 or Current-loop serial ports Each port can be individually configured to RS-232 or c

4 PCL-741 User's ManualSpecificationsBoard Number of ports: 2 Protocol selection: RS-232 or 4~20 mA current-loop UART: 2 x 16C550 (16-byte F

Chapter 1 Introduction 5Current-loop interface Signal driver/Receiver: 6N136 Signals: TxD+, TxD-, RxD+, RxD- Current value: 20 mA (Standard