Contec SPC-8450-LVA User manual

SBC Series
Single Board Computer Middle Size PCI
with LAN, VGA, Audio
SPC-8450-LVA
User’s Manual
CONTEC CO.,LTD.

SPC-8450-LVA i
Check Your Package
Thank you for purchasing the CONTEC product.
The product consists of the items listed below.
Check, with the following list, that your package is complete. If you discover damaged or missing
items, contact your retailer.
Product Configuration List
- Industrial PCI CPU board (SPC-8450-LVA) …1
- Product Guide …1
- IPC Precaution List ...1
- Driver disk utility *1 (CD-ROM) ...1
- IDE 80Ribbon Cable...1
- FDD Ribbon Cable...1
- Serial port(9pin D-SUB male x 2) ribbon cable(with bracket) ...1
- Parallel port(25pin D-SUB female x 1) ribbon cable(with bracket) ...1
- Audio jack cable(with bracket)...1
- 6 pin mini-DIN cable (2 in 1 for PS2 Mouse & Keyboard functions)
- DVI-Analog RGB conversion adapter...1
- +12V power supply cable...1
- Jumper short pin...5
*1 The CD-ROM contains the driver software and User’s Manual (this Manual)
Serial cable
IDE 80 Ribbon Cable
Floppy Ribbon Cable
DVI-Analog RGB
Converter
Driver disk utility
[CD-ROM]
Product
Guide
Product Guide
IPC Precaution
List
IPC Precaution List
+12V power supply cable
Jumper Short Pin
(2.0mm)
x 5
6 pin mini-DIN cable
(2 in 1 for PS2 Mouse
& Keyboard functions)
CPU board
[SPC-8450-LVA] Parallel cable Audio jack cable

ii SPC-8450-LVA
Copyright
Copyright 2005 CONTEC CO., LTD. ALL RIGHTS RESERVED.
No part of this document may be copied or reproduced in any form by any means without prior written
consent of CONTEC CO., LTD.
CONTEC CO., LTD. makes no commitment to update or keep current the information contained in this
document. The information in this document is subject to change without notice.
All relevant issues have been considered in the preparation of this document. Should you notice an
omission or any questionable item in this document, please feel free to notify CONTEC CO., LTD.
Regardless of the foregoing statement, CONTEC assumes no responsibility for any errors that may appear
in this document or for results obtained by the user as a result of using this product.
Trademarks
Intel, Celeron and Pentium are registered trademarks of Intel Corporation.
Microsoft Windows is a registered trademark of Microsoft Corporation.
All Other product names or trademarks are properties of their respective owners.
Caution about Battery
Replace only with the same or equivalent type recommended by the manufacturer.
Dispose of used batteries according to the local ordinances or regulations.

SPC-8450-LVA iii
Table of Contents
Check Your Package ................................................................................................................................i
Copyright.................................................................................................................................................ii
Trademarks ..............................................................................................................................................ii
Caution about Battery..............................................................................................................................ii
Table of Contents....................................................................................................................................iii
1. Introduction 1
About the SBC.........................................................................................................................................1
Features.............................................................................................................................................1
Option List........................................................................................................................................1
Customer Support....................................................................................................................................2
Web Site............................................................................................................................................2
Limited One Year Warranty....................................................................................................................2
How to Obtain Service ............................................................................................................................2
Liability....................................................................................................................................................2
Safety Precautions ...................................................................................................................................3
Safety Information............................................................................................................................3
Handling Precautions .......................................................................................................................3
Environment .....................................................................................................................................4
Inspection..........................................................................................................................................4
Storage..............................................................................................................................................4
Disposal ............................................................................................................................................4
2. System Reference 5
Specifications...........................................................................................................................................5
Power Requirements................................................................................................................................6
Connector & Jumper Location ................................................................................................................7
Block Diagram.........................................................................................................................................8
3. Hardware Installations 9
Installation procedure ..............................................................................................................................9
CPU Installation: ...................................................................................................................................10
Main Memory Installation: CN21.........................................................................................................11
Serial Port Connector: CN1 , CN2........................................................................................................12
RS-422 / RS-485 specifications .....................................................................................................13
USB Connector: CN3, CN9 ..................................................................................................................14
DVI Connector: CN4.............................................................................................................................15
10/100BASE-TX LAN Connector: CN6 ..............................................................................................16
Keyboard / Mouse Connector: CN7......................................................................................................16

iv SPC-8450-LVA
External Keyboard Connector: CN8......................................................................................................17
Audio Connector: CN10 ........................................................................................................................17
CD-IN Connector: CN11 .......................................................................................................................17
External Battery Connector: CN12........................................................................................................17
Primary IDE Connector: CN13..............................................................................................................18
Floppy Disk Drive Connector: CN14....................................................................................................19
Parallel Port Connector: CN16 ..............................................................................................................20
Front Panel Connector: CN17................................................................................................................21
ATX power control Connector: CN18...................................................................................................22
DC Power supply connector: CN19.......................................................................................................23
+12V power supply Connector: PW1....................................................................................................23
FAN Connector: FAN1/FAN2...............................................................................................................23
4. Jumper Setting 25
RS-232C/422/485 Selector: JP1/JP8 .....................................................................................................25
RS-422 Setting................................................................................................................................26
RS-485 Setting................................................................................................................................26
RS-422/485 Terminator: JP7..........................................................................................................28
CF Master/Slave Selector: JP6...............................................................................................................29
ATX/AT Power supply select: JP9........................................................................................................29
Clear CMOS Content: JP10...................................................................................................................29
5. Board Resources 31
System Address Map .............................................................................................................................31
6. Watch-Dog-Timer (WDT) Setting 33
7. BIOS Setup 37
Introduction............................................................................................................................................37
Starting Setup..................................................................................................................................37
Using Setup.....................................................................................................................................37
Main Menu.............................................................................................................................................39
Standard CMOS Setup...........................................................................................................................40
Advanced BIOS Features Setup.............................................................................................................43
Advanced Chipset Features Setup .........................................................................................................47
Integrated Peripherals ............................................................................................................................51
Power Management Setup .....................................................................................................................57
PnP/PCI Configuration Setup................................................................................................................62
PC Health Status ....................................................................................................................................65

SPC-8450-LVA v
Frequency/Voltage Control ...................................................................................................................66
Defaults Menu ................................................................................................................................67
Supervisor/User Password Setting ........................................................................................................68
Exit Selecting.........................................................................................................................................69
POST Messages.....................................................................................................................................69
POST Beep ............................................................................................................................................69
Error Messages ......................................................................................................................................70
POST Codes...........................................................................................................................................74

vi SPC-8450-LVA

1. Introduction
SPC-8450-LVA 1
1. Introduction
About the SBC
This product, which is equipped with an 845GV chip set, is a PCI bus compliant middle-sized single
board computer that supports Pentium(R) 4, Celeron(R) and Celeron(R) D. It features all-in-one-design
with a variety of interfaces including LAN, DVI-I, EIDE, USB2.0, serial, parallel and PS/2. This product
is also equipped with a CF card slot (Type I/II), enabling boot-up from a CF card.
When connecting external devices or building the system, please read this manual carefully.
Features
- Compact PCI bus middle-sized board
- The corresponding CPU is as follows :
Intel(R) Pentium(R) 4 Processor 1.7G - 2.8GHz(FSB400/533MHz)
Intel(R) Celeron(R) Processor 1.7G - 2.6GHz(FSB400MHz)
Intel(R) Celeron(R) D Processor 2.26G - 2.8GHz(FSB533MHz)
- DDR SDRAM of up to 1GB can be mounted.
- Equipped with a CF card slot (Type I/II), enabling boot-up from a CF card.
- Equipped with DVI-I I/F, enabling connection with the CONTEC PanelLink type LCD display.
- Provides the AC97 compliant sound function.
Option List
CPU
- PCP4-28S Pentium 4 2.8GHz CPU with HeatSink-FAN *1
- PCP4C-20S Celeron 2.0GHz CPU with HeatSink-FAN *1
- PCP4-24 Pentium 4 2.4GHz CPU with HeatSink-FAN *2
- PCP4C-20 Celeron 2.0GHz CPU with HeatSink-FAN *2
*1 Since a heatsink-fan interferes to board, the next 4 slots can use only a PCI half size board(length of 120mm).
*2 Since a heatsink-fan interferes to board, the next 3 slots can not use for board.
Memory
- PC-MDD256-200 200-Pin SO-DIMM DDR-Memory(PC2100, 256MB)
- PC-MDD512-200 200-Pin SO-DIMM DDR-Memory(PC2100, 512MB)
- PC-MDD1G-200 200-Pin SO-DIMM DDR-Memory(PC2100, 1GB)
CABLE
- USB Connector Cable USB connector shielded cable

1. Introduction
2SPC-8450-LVA
Customer Support
CONTEC provides the following support services for you to use CONTEC products more efficiently and
comfortably.
Web Site
Japanese http://www.contec.co.jp/
English http://www.contec.com/
Chinese http://www.contec.com.cn/
Latest product information
CONTEC provides up-to-date information on products.
CONTEC also provides product manuals and various technical documents in the PDF.
Free download
You can download updated driver software and differential files as well as sample programs available in
several languages.
Note! For product information
Contact your retailer if you have any technical question about a CONTEC product or need its price,
delivery time, or estimate information.
Limited One Year Warranty
CONTEC Industrial CPU board is warranted by CONTEC CO., Ltd. to be free from defects in material
and workmanship for up to one year from the date of purchase by the original purchaser.
Repair will be free of charge only when this device is returned freight prepaid with a copy of the original
invoice and a Return Merchandise Authorization to the distributor or the CONTEC group office from
which it was purchased.
This warranty is not applicable for scratches or normal wear, but only for the electronic circuitry and
original boards. The warranty is not applicable if the device has been tampered with or damaged through
abuse, mistreatment, neglect, or unreasonable use, or if the original invoice is not included, in which case
repairs will be considered beyond the warranty policy.
How to Obtain Service
For replacement or repair, return the device freight prepaid, with a copy of the original invoice. Please
obtain a Return Merchandise Authorization Number (RMA) from our Sales Administration Department
before returning any product.
* No product will be accepted by CONTEC group without an RMA number.
Liability
The obligation of the warrantor is solely to repair or replace the product. In no event will the warrantor be
liable for any incidental or consequential damages due to such defect or consequences that arise from
inexperienced usage, misuse, or malfunction of this device.

1. Introduction
SPC-8450-LVA 3
Safety Precautions
Understand the following definitions and precautions to use the product safely.
Safety Information
This document provides safety information using the following symbols to prevent accidents resulting in
injury or death and the destruction of equipment and resources. Understand the meanings of these labels
to operate the equipment safely.
DANGER DANGER indicates an imminently hazardous situation which, if not avoided, will
result in death or serious injury.
WARNING WARNING indicates a potentially hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION CAUTION indicates a potentially hazardous situation which, if not avoided, may result
in minor or moderate injury or in property damage.
Handling Precautions
CAUTION
- Do not modify the product. CONTEC will bear no responsibility for any problems, etc., resulting
from modifying this product.
- Do not strike or bend the board.
Otherwise, the board may malfunction, overheat, cause a failure or breakage.
- Do not touch the board's metal plated terminals (edge connector) with your hands.
Otherwise, the board may malfunction, overheat, or cause a failure. If the terminals are touched by
someone's hands, clean the terminals with industrial alcohol.
- There are switches and jumpers on the board that need to be set in advance. Be sure to check these
before installing to the expansion slot.
- Only set the switches and jumpers on the board to the specified settings.
Otherwise, the board may malfunction, overheat, or cause a failure.
DANGER
Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent
type recommended by the manufacturer. Dispose of used batteries according to the manufacturer’s
instructions.

1. Introduction
4SPC-8450-LVA
Environment
Use this product in the following environment. If used in an unauthorized environment, the board may
overheat, malfunction, or cause a failure.
Operating temperature
0 - 60°C
Operating humidity
10 - 90%RH (No condensation)
Corrosive gases
None
Floating dust particles
Not to be excessive
Inspection
Inspect the product periodically as follows to use it safely.
- Check that the board has
no dust or foreign matter adhering.
- The gold-plated leads of the bus connector
have no stain or corrosion.
- Check that the bus connector
of the board and its cable have
been plugged correctly.
Storage
When storing this product, keep it in its original packing form.
(1) Put the board in the storage bag.
(2) Wrap it in the packing material, then put it in the box.
(3) Store the package at room temperature at a place free from direct sunlight, moisture, shock, vibration,
magnetism, and static electricity.
Disposal
When disposing of the product, follow the disposal procedures stipulated under the relevant laws and
municipal ordinances.

2. System Reference
SPC-8450-LVA 5
2. System Reference
Specifications
Table 2.1. Functional Specifications <1/2>
Type SPC-8450-LVA
CPU(Option)
Intel(R) Pentium(R) 4 Processor 1.7G - 2.8GHz(FSB400/533MHz)
Intel(R) Celeron(R) Processor 1.7G - 2.6GHz(FSB400MHz)
(Only corresponding to the Northwood core)
Intel(R) Celeron(R) D Processor 2.26G - 2.8GHz(FSB533MHz)
Cache Built in CPU
Processor socket Socket 478
Memory(Option) One SO-DIMM 200-pin socket for PC2100 DDR SDRAM for up to 1GB.
Chipset 845GV Chipset includes GMCH (Graphics and Memory Controller Hub),
ICH4 (I/O Controller Hub) and FWH (Firm Ware Hub)
BIOS Award BIOS, PnP support
VGA Built in Intel(R) 845GV, DVI-I connector x 1
Multi I/O Winbond W83627HF
Keyboard / Mouse connector One PS/2 keyboard/Mouse connector(Bundled the 2 in 1 cable) , One box-header 5-pins
connector for external keyboard
Serial I/F Two 16550 UART ports, SERIAL1 is RS-232C, SERIAL2 is RS-232C/422/485 configurable,
Baud rate: 115.2K - 50bps (programmable), Two box-header 5 x 2-pins connectors
Parallel I/F One high-speed parallel port, support SPP/EPP/ECP mode, One box-header 13 x 2-pins
connector
On board expansion bus None
LAN Port 100BASE-TX/10BASE-T, Intel ICH4 integrated controller, One RJ-45 connector
IDE I/F One EIDE port, up to two IDE devices, support Ultra DMA 33/66/100, One box-header 20 x
2-pins connector
SATA I/F None
FDD I/F One FDD port, up to two floppy drives (360KB, 720KB, 1.2MB, 1.44MB, 2.88MB) , One
box-header 17 x 2-pins connector
VGA / DVI I/F DVI-I 29-pin (Bundled the DVI-Analog RGB conversion adapter)
Compact Flash Slot One CF card(Type I / II ) slot, Support boot-up from a card
SSD Socket None
USB Port 3ch USB2.0 compliant ports: One USB A Type connector(Front panel) , One box-header 5 x
2-pins connector that support 2ch
RAID None
Audio AC97 CODEC., One pin-header 5x2-pins connector for speaker-out, line-in, microphone-in.
Watchdog Timer Software programmable 255 levels (1 - 255Sec.). Reset occurrence at the time of time up.
General-purpose I/F None
Hardware Monitor Monitoring of the temperature of CPU and board, power supply voltage, and fan speed
The coin type Lithium battery specification is shown in table
The Lithium battery specification is shown in table
Specification CR2450
Voltage 3V
Capacity 620mAh
Weigh 6.3g
RTC
* Backup time: Over 7 years at none AC power 25ºC.
* Real Time Clock accurate: ±3 minutes/month at 25ºC.
Power Management Power management setup via BIOS Modem Ring On/Wake On LAN
Supports PC98/PC99 ACPI Power management

2. System Reference
6SPC-8450-LVA
Table 2.1. Functional Specifications <2/2>
Type SPC-8450-LVA
Bus specification/Size(mm) PCI/223(L) x 122(H)
DC Power Requirements +5VDC±5%
+12VDC±5%
+5VSB(Stand by) ±5%(Only when using the ATX power supply)
Power supply
specifications(Max.)
Pentium 4 2.4GHz
+5VDC±5%, 5.40A
+12VDC±5%, 6.20A
+5VSB±5%, 0.65A
Operating temperature 0 - 60°C (It depends on the specification of CPU and heat sink.)
10 - 90%RH(No condensation)
Storage temperature -20 - 80°C
Floating dust particles Not to be excessive
Corrosive gases None
Weight 390g
Operating System Support Windows XP Professional
Windows XP Home Edition
Windows 2000 Professional
Power Requirements
Your system requires a clean, steady power source for reliable performance of the high frequency CPU on
the SPC-8450-LVA , the quality of the power supply is even more important. For the best performance
makes sure your power supply provides a range of 4.75 volts minimum to 5.25 volts maximum DC power
source.
Power Consumption
For typical configurations, the CPU card is designed to operate with at least a 250 W power supply. A
higher-wattage power supply should be used for heavily-loaded configurations. The power supply must
meet the following requirements:
- Rise time for power supply: 2 ms - 20 ms
- Minimum delay for reset to Power Good: 100 ms
- Minimum Power down warning: 1 ms
The following table lists the power supply’s tolerances for DC voltages:
Table 2.2. DC voltage tolerance
DC Voltage Acceptable Tolerance
+5V ± 5%
+5VSB (standby) ± 5%
+12V ± 5%

2. System Reference
SPC-8450-LVA 7
Connector & Jumper Location
CN19
CN18
CN17
JP10
CN12
FAN1JP9JP2,3,4,5
CN8
CN7
CN6
CN4
CN3
JP/JP8
CN1CN2 CN9 CN10 CN11 CN13 CN14 CN16 PW1FAN2
JP6
JP7
CN21
CF
Figure 2.1. Connector & Jumper Location
Item Content Item Content
CN1 / CN2 Serial Port Connector CN18 ATX power control Connector
CN3 / CN9 USB Connector CN19 DC Power supply connector
CN4 DVI Connector CN21 SO-DIMM Memory Socket
CN6 10/100BASE-TX LAN Connector FAN1 FAN Connector1
CN7 Keyboard / Mouse Connector FAN2 FAN Connector2
CN8 External Keyboard Connector PW1 +12V power supply Connector
CN10 Audio Connector JP1 / JP8 RS-232C/422/485 Selector
CN11 CD-IN Connector JP2, 3, 4, 5 Keyboard / Mouse Connector
CN12 External Battery Connector JP6 CF Master/Slave Selector
CN13 Primary IDE Connector JP7 RS-422/485 Terminator
CN14 Floppy Disk Drive Connector JP9 ATX/AT Power supply select
CN16 Parallel Port Connector JP10 Clear CMOS Content
CN17 Front Panel Connector CF CF Slot

2. System Reference
8SPC-8450-LVA
Block Diagram
LPC BUS AC'97 LINK
DC TO DC
REGULATOR Processor
PWM
SOCKET 478
P4/Celeron D
PROCESSOR CLOCK
Generator
ADDR
GMCH
845GV
DVH
CONNECTOR TMDS
Sir164
DDR266
SO-DIMM
Modules x 1
HUB LINK
PCI GOLD FINGER
LAN 10/100M
Connector
LAN DATA
PCI CNTRL
PCI ADDR/DATA
RGB BUS
DVOS BUS
ICH4
USB
USB 2.0
PORT 1-3
IDE
(Primary)
CF Card Slot
(Secondary)
UDMA66/100
AC'97
CODEC
FirmWare Hub
Super I/O
Parallel
Serial1/
Serial2
Keyboard
Mouse
Floppy
ADDR
CTRL CTRL
DATA DATA
AGTL+BUS
Figure 2.2. Block Diagram

3. Hardware Installations
SPC-8450-LVA 9
3. Hardware Installations
This chapter provides information on how to use the jumpers and connectors on the SPC-8450-LVA in
order to set up a workable system.
Installation procedure
(1) Confirm the power supply is off.
(2) Install the processor with correct orientation.
(3) Insert the DRAM module with correct orientation.
(4) Mount the Fan on the top of the processor and connect it to FAN2 connector.
(5) Insert +12V Power supply cable to PW1 connector.
(6) The jumpers are set up according to the conditions to be used.
(7) Insert all external cables (Hard disk, floppy, keyboard, Mouse, LAN, etc.)
(8) Insert CRT or LCD monitor to DVI-I connector (CN4).
(9) Turn on the power.
(10)Enter the BIOS setup mode by pressing ‘Del’ key during boot up.
(11)Use the “Load BIOS Optimal Defaults” feature.
(12)Configure the Peripheral Setup and the Standard Setup correctly.
CAUTION
The CMOS memory may be in an undefined state at power-on after a period of no battery backup.

3. Hardware Installations
10 SPC-8450-LVA
CPU Installation:
The SPC-8450-LVA supports a single Intel 478pin FC-PGA2 type, Pentium 4, Celeron or Celeron D
processor. The processor’s VID pins automatically program the voltage regulator on the CPU card to the
required processor voltage. The host bus speed is automatically selected. The processor connects to the
CPU card through the 478-pins socket.
The CPU card supports the processors listed in table below:
CeleronProcessor
Host Bus frequency Cache size
400MHz 128KB
Celeron D Processor
Host Bus frequency Cache size
533MHz 256KB
Pentium 4 Processor
Host Bus frequency Cache size
400MHz / 533MHz 256K/512K/1MB
The socket-478 comes with a lever to secure the processor. Make sure the notch on the corner of the CPU
corresponds with the notch on the inside of the socket.
After you have installed the processor into the socket 478, check if the configuration setup for the CPU
type and speed are correct. The CPU should always have a Heat Sink and a cooling fan attached to
prevent overheating.
CAUTION
Ensure that the CPU heat sink and the CPU top surface are in total contact to avoid CPU overheating
problem that would cause your system to hang or be unstable
The heights of the heat sink that optional CPU.
PCP4-24, PCP4C-20 :70mm
PCP4-28S, PCP4C-20S :83mm
Height

3. Hardware Installations
SPC-8450-LVA 11
Main Memory Installation: CN21
The SPC-8450-LVA support one single-side or double-sided DDR200(PC1600)/266(PC2100)
unregistered SO-DIMM, 200-pin SO-DIMM sockets for a maximum memory of 1GB. Using the non-
ECC DDR SDRAM SO-DIMM.
The CPU card supports the following memory features:
- 200-pin SO-DIMM with gold-plated contacts
- 200 MHz (PC1600)/266 MHz (PC2100) DDR SDRAM
- Non-ECC DIMM
- Unbuffered, unregistered single-sided or double-sided SO-DIMMs
Table 3.1. DDR SDRAM
SO-DIMM Size Non-ECC
128MB 16Mbit x 64
256MB 32Mbit x 64
512MB 64Mbit x 64
1024MB 128Mbit x 64
CAUTION
All memory components and DIMM used with the SPC-8450-LVA CPU card must comply with the
PC SDRAM Specification. These include: the PC SDRAM Specification *memory component
specific), the PC Unbuffered DIMM Specification, and the PC Serial Presence Detect Specification.

3. Hardware Installations
12 SPC-8450-LVA
Serial Port Connector: CN1 , CN2
Serial1(CN1) and Serial2(CN2) are 10-pin box-headers. Both are onboard serial ports of the CPU card
SPC-8450-LVA. The following table shows the pin assignments of these connectors. RS-232C/422/485
assigned for Serial2(CN2) connector only.
Table 3.2. Serial Port connector (CN1, 2)
Pin No.
1
2
3
4
5
6
7
8
9
10
RS-232C
DCD
RXD
TSD
DTR
GND
DST
RTS
CTS
RI
N.C.
RS-422*
TX-
TX+
RX+
RX-
GND
RTS-
RTS+
CTS+
CTS-
N.C.
RS-485*
TX-
TX+
RX+
RX-
GND
N.C.
N.C.
N.C.
N.C.
N.C.
CN1/CN2
16
510
* RS-422/485 assigned for Serial2(CN2) connector only.
Pin assignment after conversion by attached cable (D-SUB 9Pin Male Connector, No.4-40UNC )
Table 3.3. Attached cable (9pin D-SUB) pin assignment
Pin No.
1
2
3
4
5
6
7
8
9
RS-232C
DCD
RXD
TXD
DTR
GND
DSR
RTS
CTS
RI
RS-422
TX-
TX+
RX+
RX-
GND
RTS-
RTS+
CTS+
CTS-
RS-485
TX-
TX+
RX+
RX-
GND
N.C.
N.C.
N.C.
N.C.
15
9
6
CAUTION
- For RS-485, TX+(pin 2) and RX+ (pin 3) must jumper together inside the D type connector.
-TX- (pin 1) and RX- (pin 4) is the same.

3. Hardware Installations
SPC-8450-LVA 13
RS-422 / RS-485 specifications
- Transmission system: Asynchronous, half-/full-duplex serial transmission conforming to RS-422/
RS-485
-Baud rate: 115.2K - 50bpx (programmable)
-Signal extensible distance: 1.2km Max.
RTS#
JP1: 7-8
TXD D
JP1: 5-6
JP1: 4-6 R
RXD
47k Ω
6.2kΩ
6.2kΩ
47k Ω
R
CTS#
47k Ω
6.2kΩ
6.2kΩ
47k Ω
RTS# DJP7: 3-4
120 Ω
JP7: 1-2120 Ω
JP7: 7-8120 Ω
10 5
61
JP7: 5-6120 Ω
+5V
CN2
Terminating Resister