Serial Quick Reference Guide - National Instruments

1 Serial Quick Reference GuideFor more information about NI products, refer to to the NI Trademarks and Logo Guidelines at for more information on National Instruments trademarks. Other product and company names mentioned herein are trademarks or trade names of their respective companies. For patents covering National Instruments products/technology, refer to the appropriate location: Help Patents in your software, the file on your media, or the National Instruments Patents Notice at You can find information about end-user license agreements (EULAs) and third-party legal notices in the readme file for your NI product.

2 Refer to the Export Compliance Information at for the National Instruments global trade compliance policy and how to obtain relevant HTS codes, ECCNs, and other import/export data. 2004 2013 National Instruments . All rights Modular JackPin232422/4851No Connect No Connect2RI1 TXD 3 CTSTXD+4 RTSRTS (HSO )5 DSR1 CTS (HSI )6 GNDRXD 7 DTR1 RXD+8 TXDRTS+ (HSO+)9 RXDCTS+ (HSI+)10 DCD1 GND1 These signals are No Connect on the PCI-232I and PXI-8422 MalePin232 DTE232 DCE422/4851 DCD2 DCDGND2 RXDTXDCTS+ (HSI+)3 TXDRXDRTS+ (HSO+)4 DTR2 DSRRXD+5 GNDGNDRXD 6 DSR2 DTRCTS (HSI )7 RTSCTSRTS (HSO )8 CTSRTSTXD+9RI2 RITXD Note.

3 DCE mode supported on USB-232/2 and USB-232/4 These signals are No Connect on the PCI-232I and PXI-8422 ports and ports 9 16 on legacy 16-port MalePin232422/4852 TXDRTS+ (HSO+)3 RXDCTS+ (HSI+)4 RTSRTS (HSO )5 CTSTXD+6 DSR3 CTS (HSI )7 GNDRXD 8 DCD3 GND20 DTR3 RXD+22RI3 TXD Pins not listed in this table are No Connect. 3 These signals are No Connect on the PCI-232I and PXI-8422 LoopbackRS-232 SignalsUART Data Frame Example0xD9 8 Data Bits, Odd Parity, 1 Stop BitRS-485/422 LoopbackRS-485/422 SignalsRS-485 Topologies2-Wire Multidrop Network Using Terminating Resistors4-Wire Full-Duplex Multidrop Network Using Terminating ResistorsRS-485 terminators are available at Programming ExampleFor more information about LabVIEW, refer to TableDecHexCharDecHexCharDecHexCharDecHe xChar00x00(nul)320x20(sp)640x40@960x60 10x01(soh)330x21!

4 650x41A970x61a20x02(stx)340x22 660x42B980x62b30x03(etx)350x23#670x43C99 0x63c40x04(eot)360x24$680x44D1000x64d50x 05(enq)370x25%690x45E1010x65e60x06(ack)3 80x26&700x46F1020x66f70x07(bel)390x27 710x47G1030x67g80x08(bs)400x28(720x48H10 40x68h90x09(tab)410x29)730x49I1050x69i10 0x0A(lf)420x2A*740x4AJ1060x6Aj110x0B(vt) 430x2B+750x4BK1070x6Bk120x0C(ff)440x2C,7 60x4CL1080x6Cl130x0D(cr)450x2D-770x4DM10 90x6Dm140x0E(so) (si)470x2F/790x4FO1110x6Fo160x10(dle)480 x300800x50P1120x70p170x11(dc1)490x311810 x51Q1130x71q180x12(dc2)500x322820x52R114 0x72r190x13(dc3)510x333830x53S1150x73s20 0x14(dc4)520x344840x54T1160x74t210x15(na k)530x355850x55U1170x75u220x16(syn)540x3 66860x56V1180x76v230x17(etb)550x377870x5 7W1190x77w240x18(can)560x388880x58X1200x 78x250x19(em)570x399890x59Y1210x79y260x1 A(sub)580x3A:900x5AZ1220x7Az270x1B(esc)5 90x3B;910x5B[1230x7B{280x1C(fs)600x3C<920x5C\1240x7C|290x1D(gs)610x3D=930x5D]1250x7D}300x1E(rs)620x3E>940x5E^1260x7E~310x1F(us)630x3F?

5 950x5F_1270x7F(del)RS-485 Transceiver ControlNI- Serial FeaturesHardware Flexible baud rates up to 3 Mb/s High-performance DMA engine Isolation up to 2000 V RS-485 transceiver controlSoftware Deterministic control with LabVIEW Real-Time Over 3000 instrument drivers online Powerful development toolsFor more information about NI Serial products, refer to 10 Pin 1 Pin 1 Pin 9 Pin 5 Pin 6 Pin 1 Pin 25 Pin 13 Pin 14 Pin 1 Pin 9 Pin 5 Pin 6 Pin 1 Pin 9 Pin 5 Pin 6TX/RXAllSPACE, '0'MARK, '1'UNKNOWN25 V3 V 3 V 25 VDataRS-232RS-485 IdleS01234567 PSIdle010110110+5 V 5 V5 V5 V0 V0 VTX+TX Voltages are for illustration only.

6 Actual voltage levels may 1 Pin 9 Pin 5 Pin 6 Pin 1 Pin 9 Pin 5 Pin 6TX/RXAllIf ' ' < '+'then MARK, '1'If ' ' > '+'then SPACE, '0'RS-422 Voltage: 7 VRS-485 Voltage: 7 V to +12 VMASTERS lave 1120 Slave 2 Slave n120 TxTxRxTxRxTxRxRxMASTERS lave 1120 Slave 2 Slave n120 TxTxRxTxRxTxRxRx120 120 TXRXONONDTRONDTRDTRTXTX4-WireDTR/EchoDTR /No EchoAuto2-WireEnabl