Warning
Please read this instruction sheet carefully before use.
Switch off th e power before wiring.
RTU-485 is an OPEN-TYPE device and therefore should be installed in an enclosure free of airborne dust,
humidity, electric shock and vibration. The enclosure should prevent non-maintenance staff from operating the
device (e.g. key or specific tools are required to open the enclosure) in case danger and damages on the
device may occur.
DO NOT touch the internal circult in one minute after the power is switched off.
DO NOT connect input AC power supply to any of the I/O terminals; otherwise serious damage may occur.
Check all the wiring again before switching on the power and DO NOT touch any terminal when the power is
switched on. Make sure the ground terminal is correctly grounded in order to prevent electromagnetic
interference.
Introduction
Thank you for choosing Delta RTU-485 communication module. RTU-485 is a Modbus remote I/O
communication module for Delta's PLC to remote-control Slim series DI/DO and AI/AO extension units.
As a standard Modbus slave, RTU-485 is compatible with other master station complying with Modbus
protocol.
Product Profile & Outline
SG D- D+
STOP
RUN
RTU-485
RUN
ALAR M
POWE R
RS-4 85
1
2
3
5
6
Unit: mm
1. POWER indicator 9. Mounting hole for extension unit
2. RUN indicator 10. Nameplate
3. ALARM indicator 11. Extension port for extension unit
4. RUN/STOP switch 12. DIN rail slot (35mm)
5. Communication indicator 13. Fastening hole for extension unit
6. Address setup DIP switch 14. DIN rail clip
7. Communication mode setup DIP switch 15. Mounting rail for extension unit
8. RS-485 c ommunication port 16. Power input
ENGLISH
Specifications
RTU-485 Connector
Type Removable 3-pin connector
Transmission
method RS-485
Transmission cable 2 twisted isolation cables
Electrical isolation 500V DC
Communication
Valid communication
address 1 ~ F0 (decimal: 1 ~ 240)
Series transmission
speed 1,200/2,400/4,800/9,600/19,200/38,400/57,600/115,200 bps (bits per second)
Communication
mode
7,E,1-ASCII / 7,O,1-ASCII / 7,E,2-ASCII / 7,O,2-ASCII / 7,N,2-ASCII / 8,E,1-ASCII /
8,O,1-ASCII / 8,N,1-AS CII / 8,N,2-ASC II / 8,E,1-RTU / 8,O,1-RTU / 8,N,1-RTU/
8,N,2-RTU
Electrical Specification
Power voltage 24V DC (-15% ~ 20%) (with DC input polarity reverse protection)
Environment
Noise immunity
ESD (IEC 61131-2, IEC 61000-4-2): 8KV Air Discharge, 4KV Contact Discharge
EFT (IEC 61131-2, IEC 61000-4-4): Power Li4ne: 2KV, Digital I/O: 1KV
Analog & Communication I/O: 1KV
Damped-Oscillatory Wave: Power Line: 1KV, Digital I/O: 1KV
RS (IEC 61131-2, IEC 61000-4-3): 80MHz ~ 1000MHz , 1.4GHz ~ 2.0GHz , 10V/m
Operation/storage Operation: 0ºC ~ 55ºC (temperature), 50 ~ 95% (humidity), pollution degree 2
Storage: -25ºC ~ 70ºC (temperature), 5 ~ 95% (humidity)
Shock/vibration
immunity
International standards: IEC61131-2
、
IEC 68-2-6 (TEST Fc)/IEC61131-2 & IEC 68-2-27
(TEST Ea)
Standards IEC 61131-2, UL508
Components
RUN/STOP Switch
Status Explanation
1. RUN indicator on RTU-485 is On.
2. AI/AO extension unit in RUN status.
1. AI/AO extension unit switches from RUN to STOP status.
RUN STOP 2. Y points on DI/DO extension unit are all Off.
1. RUN indicator on RTU-485 is Off.
2. AI/AO extension unit in STOP status.
3. Communication control is not allowed in AI/AO extension unit.
STOP
4. Communication control is not allowed in DI/DO extension unit.
1. RTU-485 re-detects the number of points in DI/DO unit and the
number of AI/AO units.
RU N
STOP RUN
2. AI/AO extension unit switches from STOP to RUN status.
Address Setup DIP Switch
DIP Switch Setting Explanation
H’01 ~ H’F0 For valid RTU-485 address, the definition of ID0 ~ ID7
are: 2
0
, 2
1
, 2
2
, … 2
6
, 2
7
.
H’00, H’F1 ~ H’FF In the Modbus protocol, H’00 is defined as broadcast
mode. H’F1 ~ H’FF are incorrect RTU-485 addresses.
Communication Mode Setup DIP Switch
The communication setup switch is a set of 8-bit DIP switches. PA0 ~ PA3 are for setting up RTU-485
communication mode, DR0 ~ DR2 are for setting up the series transmission speed, and A/R is for setting
up ASCII/RTU mode. There are 13 communication modes and 8 series transmission speeds available.
PA3 PA2 PA1 PA0 A/R Communication mode
OFF OFF OFF OFF ON 7,E,1-ASCII
OFF OFF OFF ON ON 7,O,1-ASCII
OFF OFF ON OFF ON 7,E,2-ASCII
OFF OFF ON ON ON 7,O,2-ASCII
OFF ON OFF OFF ON 7,N,2-ASCII
OFF ON OFF ON ON 8,E,1-ASCII
OFF ON ON OFF ON 8,O,1-ASCII
OFF ON ON ON ON 8,N,1-ASCII
ON OFF OFF OFF ON 8,N,2- ASCII
OFF ON OFF ON OFF 8,E,1-RTU
OFF ON ON OFF OFF 8,O,1-RTU
OFF ON ON ON OFF 8,N,1-RTU
ON OFF OFF OFF OFF 8,N,2-RTU
Other settings of PA3, PA2, PA1, PA0 and A/R will be regarded as invalid
communication modes
DR2 DR1 DR0 Series Transmission speed
OFF OFF OFF 1,200 bit/s
OFF OFF ON 2,400 bit/s
OFF ON OFF 4,800 bit/s
OFF ON ON 9,600 bit/s
ON OFF OFF 19,200 bit/s
ON OFF ON 38,400 bit/s
ON ON OFF 57,600 bit/s
ON ON ON 115,200 bit/s
Function Codes Supported by RTU-485
RTU-485 complies with the standard Modbus protocol, supporting the 7 function codes, H’01, H’02, H’03,
H’05, H’06, H’0F, and H’10. Please refer to the standard Modbus protocol for the specific data format of
each function code.
Function code
Function Data type Applicable address
H’01 Read the output status of bit
device bit DO area: H ’0500 ~ H’057F
H’02 Read the input status of bit
device. bit DI area: H’0400 ~ H’047F
Special function area: H’0000 ~ H’001F
CR of the 1
st
AI/AO unit: H’1600 ~ H’1630
CR of the 2
nd
AI/AO unit: H’1640 ~ H’1670
CR of the 3
rd
AI/AO unit: H’1680 ~ H’16B0
CR of the 4
th
AI/AO unit: H’16C0 ~ H’16F0
CR of the 5
th
AI/AO unit: H’1700 ~ H’1730
CR of the 6
th
AI/AO unit: H’1740 ~ H’1770
CR of the 7
th
AI/AO unit: H’1780 ~ H’17B0
H’03 Read register word
CR of the 8
th
AI/AO unit: H’17C0 ~ H’17F0
H’05 Write single datum into bit
device bit DO area: H ’0500 ~ H’057F
RUN/STOP RTU module: H’0003
H’06 Write single datum into register word Applicable to CR with write attribute in t he 1
st
~ 8
th
AI/AO extension unit.
H’0F Write many data into bit device bit DO area: H’0500 ~ H’057F
RUN/STOP RTU module: H’0003
H’10 Write many data into register word Applicable to CR with write attribute in the 1
st
~ 8
th
AI/AO extension unit.
Example: Use function code 03 to read CR0 and CR1 in the 1
st
AI/AO extension unit: (ASCII mode)
The request message sent from master PLC to RTU-485 is “: 01 03 16 00 00 02 E4 CR LF”
The responding message sent from RTU-485 to the master PLC is “: 01 03 04 00 88 00 00 70 CR LF”
Note:
1. RTU-485 can only read and write one AI/AO extension unit at the same time.
2. RTU-485 is able to read/write maximum 16 words ata time in the communication control.
L D Indicators
POWER Indicator
LED status Indication How to deal with it
Off No power
Check if the power and connection of
RTU-485 work normally. If both work
normally, your RTU-485 malfunctions.
Please change to a new RTU-485.
Constantly On in green RTU-485 module is powered -
RUN Indicator
LED status Indication How to deal with it
Off RTU-485 and the connected AI/AO
extension unit are in STOP status. -
Constantly On in green RTU-485 and the connected AI/AO
extension unit are in RUN status. -
ALARM Indicator
LED status Indication How to deal with it
Red light flashes Low power voltage Adjust the voltage supplied to RTU-485 to
normal voltage.
Incorrect communication format
Reset to the communication format
supported by RTU-485 and re-power the
module after the setup.
Incorrect station No. Check if the station No. is within H’01 ~
H’F0.
Constantly On in red
1. No extension unit connected
2. More than 8 extension unit
connected
3. More then 128 I/O points in the
extension unit.
1. Make sure the extension unit is correctly
connected.
2. Make sure the number of connected
extension units is less than 8.
3. Make sure the number of I/O points is
less than128.
RS-485 Indicator
LED status Indication How to deal with it
Red light flashes during
communication
The LED will flash once when RTU-485
and the master completes the
communication of 1 message.
-
注意事項
請在使用之前，詳細閱讀本使用說明書。
實施配線，務必關閉電源。
本機為開放型
OPEN TYPE
）機殼，因此使用者使用本機時，必須安裝於具防塵、防潮及免於電擊
／衝擊意外的外殼配線箱內。另必須具備保護措施 如：特殊的工具或鑰匙才可打開），防止非維護
人員操作或意外衝擊本體，造成危險及損壞。
輸入電源切斷後，一分鐘之內，請勿觸摸內部電路。
交流輸入電源不可連接於輸入／輸出信號端，否則可能造成嚴重損壞。請在上電前再次確認電源配線，
且請勿在上電時觸摸任何端子。本體上的接地端子 務必正確的接地，以提高產品抗雜訊能力。
產品簡介
感謝您使用台達
RTU-485
通訊模組，
RTU-485
為
Modbus
遠端
I/O
通訊模組，可實現台達可程式控制器對
Slim
系列
DI/DO
，
AI/AO
擴充模組的遠端控制
。此 ，
RTU-485
做為標準的
Modbus
從站設備，也可以相
容其他遵循
Modbus
協定的主控設備。
產品外觀及各部介紹
產品外觀及各部介紹產品外觀及各部介紹
產品外觀及各部介紹
SG D- D+
STOP
RUN
RTU-485
RUN
ALAR M
POWE R
RS-4 85
1
2
3
5
6
尺寸單位：
mm
1. POWER
指示燈
9.
擴充機定位孔
2. RUN
指示燈
10.
銘牌說明
3. ALARM
指示燈
11.
擴充機連介面
4. RUN/STOP
開關
12. DIN
軌槽
(35mm)
5. Communication
指示燈
13.
擴充機固定扣
6.
站號設置開關
14. DIN
固定扣
7.
通訊模式設置開關
15.
擴充機固定槽
8. RS-485
通訊口
16.
電源輸入口
繁體中文
繁體中文繁體中文
繁體中文
功能規格
RTU-485
連接器
連接器連接器
連接器
接頭
可插拔式
3Pin
連接器
傳輸方式
RS-485
傳輸電纜
2
絞線式隔離線
電氣隔離
500V DC
通訊
通訊通訊
通訊
有效通訊位址
1 ~ F0
（十進位為
1 ~ 240
）
串列傳輸 率
支援
1,200
、
2,400
、
4,800
、
9,600
、
19,200
、
38,400
、
57,600
、
115,200 bps
（位元
/
秒）
通訊模式
支援
7,E,1-ASCII
、
7,O,1-ASCII
、
7,E,2-ASCII
、
7,O,2-ASCII
、
7,N,2-ASCII
、
8,E,1-ASCII
、
8,O,1-ASCII
、
8,N,1-ASCII
、
8,N,2-ASCII
、
8,E,1-RTU
、
8,O,1-RTU
、
8,N,1-RTU
、
8,N,2-RTU
電氣規格
電氣規格電氣規格
電氣規格
電源電壓
24 V DC (-15% ~ 20%)
（具直流輸入電源極性反接保護）
環境規格
環境規格環境規格
環境規格
雜訊免疫力
ESD (IEC 61131-2, IEC 61000-4-2): 8KV Air Discharge
，
4KV Contact Discharge
EFT (IEC 61131-2, IEC 61000-4-4): Power Line: 2KV, Digital I/O: 1KV
Analog & Communication I/O: 1KV
Damped-Oscillatory Wave: Power Line: 1KV, Digital I/O: 1KV
RS (IEC 61131-2, IEC 61000-4-3): 80MHz~1000MHz , 1.4GHz~2.0GHz , 10V/m
操作
/
儲存環境
操作：
0ºC ~ 55ºC
（溫度）、
50 ~ 95%
（濕度）、污染等級
2
儲存：
-25ºC ~ 70ºC
（溫度）、
5 ~ 95%
（濕度）
耐震動
/
衝擊
國際標準規範
IEC61131 -2
、
IEC 68-2-6 (TEST Fc)/IEC61131-2 & IEC 68-2-27 (TEST Ea)
標準
IEC 61131-2
、
UL508
標準
各部元件介紹
RUN/STOP
開關
開關開關
開關
狀
態
說
明
1. RTU-485
模組的
RUN
燈亮
RUN 2. AI/AO
擴充模組處於
RUN
狀態
1. AI/AO
擴充模組由
RUN
切換到
STOP
狀態
RUN STOP 2. DI/DO
的
Y
點全部變為
OFF
狀態
1. RTU-485
模組的
RUN
燈熄滅
2. AI/AO
擴充模組處於
STOP
狀態
3. AI/AO
擴充模組不可通訊控制
STOP
4. DI/DO
擴充機不可通訊控制
1. RTU-485
模組重新偵測擴充機
DI/DO
點數和
AI/AO
台數
S TOP
R U N
STOP RUN 2. AI/AO
擴充模組由
STOP
切換到
RUN
狀態
