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	FEATURES   Two serial port connectors on the IOB31   On board headers for mouse and keyboard to support PS/2 keyboard and mouse operation   On board connectors for parallel printer and floppy ports   PCI Express expansion capability for backplanes such as Chassis Plans' BPX3/14
DESCRIPTION The IOB31 is an optional I/O and PCI Express expansion board that connects to the controlled impedance connector (P20) on the NLT or NLI system host board (SHB) to complement the advanced USB and SATA I/O capability of the SHBs. In addition, the IOB31 provides a x4 PCI Express edge connector that connects to a PCI Express expansion slot on backplanes like Chassis Plans' BPX3/14. This PCI Express interface is designed to support additional high-speed backplane card slots while taking advantage of the increased bandwidth capabilities between the SHB and the option cards made possible by PCI Express technology. The layout drawings below show the placement of the board's I/O and PCI Express expansion connectors. The IOB31 comes with mounting hardware and standoffs for securely attaching the IOB31 to either a NLT or NLI SHB.
NOTE: Pin 1 on the connectors is indicated by the square pad on the PCB. P1 - SERIAL PORT 1 CONNECTOR (COM 1) 10 pin dual row header, Amp #103308-1 PIN SIGNAL 1 Carrier Detect 3 Receive Data-I 5 Transmit Data-0 7 Data Terminal Ready-0 9 Signal Gnd PIN SIGNAL 2 Data Set Ready-I 4 Request to Send-O 6 Clear to Send-I 8 Ring Indicator-I 10 NC P2 - SERIAL PORT 2 CONNECTOR (COM 2) 10 pin dual row header, Amp #103308-1 PIN SIGNAL 1 Carrier Detect 3 Receive Data-I 5 Transmit Data-0 7 Data Terminal Ready-0 9 Signal Gnd PIN SIGNAL 2 Data Set Ready-I 4 Request to Send-O 6 Clear to Send-I 8 Ring Indicator-I 10 NC P4 - FLOPPY DRIVE CONNECTOR 34 pin dual row header, Amp #103308-7 PIN SIGNAL 1 Gnd 3 Gnd 5 Gnd 7 Gnd 9 Gnd 11 Gnd 13 Gnd 15 Gnd 17 Gnd 19 Gnd 21 Gnd 23 Gnd 25 Gnd 27 Gnd 29 Gnd 31 Gnd 33 Gnd PIN SIGNAL 2 N-RPM 4 NC 6 D-Rate0 8 P-Index 10 N-Motoron 1 12 N-Drive Sel2 14 N-Drive Sel1 16 N-Motoron 2 18 N-Dir 20 N-Stop Step 22 N-Write Data 24 N-Write Gate 26 P-Track 0 28 P-Write Protect 30 N-Read Data 32 N-Side Select 34 Disk Chng P5 - PARALLEL PORT CONNECTOR 26 pin dual row header, Amp #103308-6 PIN SIGNAL 1 Strobe 3 Data Bit 0 5 Data Bit 1 7 Data Bit 2 9 Data Bit 3 11 Data Bit 4 13 Data Bit 5 15 Data Bit 6 17 Data Bit 7 19 ACK 21 Busy 23 Paper End 25 Slct PIN SIGNAL 2 Auto Feed XT 4 Error 6 Init 8 Slct In 10 Gnd 12 Gnd 14 Gnd 16 Gnd 18 Gnd 20 Gnd 22 Gnd 24 Gnd 26 NC	P6 - I/O Expansion Mezzanine Card Connector 76 pin controlled impedance connector, Samtec #MIS-038-01-FD-K PIN SIGNAL 1 +12V 3 NC 5 NC 7 NC 9 NC 11 NC 13 ICH_SMI# 15 ICH_SIOPME# 17 Gnd 19 L_FRAME# 21 L_DRQ1# 23 L_DRQ0# 25 SERIRQ 27 Gnd 29 PCLK14SIO 31 Gnd 33 SMBDATA_RESUME 35 SMBCLK_RESUME 37 SALRT#_RESUME 39 Gnd 41 EXP_CLK100 43 EXP_CLK100# 45 Gnd 47 C_PE_TXP4 49 C_PE_TXN4 51 Gnd 53 C_PE_TXP3 55 C_PE_TXN3 57 Gnd 59 C_PE_TXP2 61 C_PE_TXN2 63 Gnd 65 C_PE_TXP1 67 C_PE_TXN1 69 Gnd 71 +3.3V 73 +3.3V 75 +3.3V PIN SIGNAL 2 +5V_STANDBY 4 +5V_STANDBY 6 +5V_DUAL 8 +5V_DUAL 10 NC 12 NC 14 ICH_RCIN# 16 ICH_A20GATE 18 Gnd 20 L_AD3 22 L_AD2 24 L_AD1 26 L_AD0 28 Gnd 30 PCLK33LPC 32 Gnd 34 IPMB_DAT 36 IPMB_CLK 38 IPMB_ALRT# 40 Gnd 42 EXP_RESET# 44 ICH_WAKE# 46 Gnd 48 C_PE_RXP4 50 C_PE_RXN4 52 Gnd 54 C_PE_RXP3 56 C_PE_RXN3 58 Gnd 60 C_PE_RXP2 62 C_PE_RXN2 64 Gnd 66 C_PE_RXP1 68 C_PE_RXN1 70 Gnd 72 +5V 74 +5V 76 +5V P7 - KEYBOARD HEADER 5 pin single row header, Amp #640456-5 PIN SIGNAL 1 Kbd Clock 2 Kbd Data 3 Key 4 Kbd Gnd 5 Kbd Power (+5V fused) with self-resetting fuse P8 - PS/2 MOUSE HEADER 6 pin single row header, Amp #640456-6 PIN SIGNAL 1 Ms Data 2 Reserved 3 Gnd 4 Power (+5V fused) with self-resetting fuse 5 Ms Clock 6 Reserved
MODEL NAME: IOB31 MODEL# MODEL NAME DESCRIPTION S6474-000 IOB31 Optional I/O and PCI Express expansion board for the NLT and NLI system host boards NLT Product Detail NLI Product Detail