Ebyte 4440-GPRS Bedienungsanleitung
E850-DTU(4440-GPRS)
User Manual
This manual may change with the continuous improvement of the product. Please refer to the latest version of the instruction.
Chengdu Ebyte Electronic Technology Co., Ltd. reserves all rights of final interpretation and modification of this manual.
Wireless Data Transceiver E850-DTU(4440-GPRS) datasheet
Copyright ©2012–2018，成都亿佰特电子科技有限公司 2
Feature
Support 4-channel analog input, default current detection
Support 4-channel switch input, default dry contact
Support 4-channel relay output
Support socket connection to remote server, support TCP Client
Support Modbus TCP/RTU protocol
Support Ebyte cloud, controlled by command
Support 2 working mode, master and slave, slave can cascade multiple devices through RS485
Support reload button to restore factory settings, tap the button and press for 5 seconds, the
Modbus device address、RS485 baud rate and parity bit restore factory settings
Hardware watchdog with high reliability
Multiple indicators to show working status
The power supply has good functions such as overcurrent, overvoltage and anti-reverse
connection
Note: Products can be customized, such as conditional control (how to output based on input state)
1. Quick start
This chapter is a quick introduction to the E850-DTU (4440-GPRS) series. It is recommended that
users read this chapter carefully and follow the instructions. It will have a systematic understanding of
the product, and users can also select the chapters of interest as needed. . For specific details and
instructions, please refer to the following sections.
Wireless Data Transceiver E850-DTU(4440-GPRS) datasheet
Copyright ©2012–2018，成都亿佰特电子科技有限公司 4
1.1.4 Analog input connection
1.2 Quick instruction
Cable connection: The computer connects to the E850-DTU (4440-GPRS) via USB to RS485.
Network connection: Insert SIM card in power-off state.
Power supply: E850-DTU (4440-GPRS) working voltage is DC 8-28V.
1.2.1 RS485 control
Select the port, click “Search”, and search the device.
After the device is searched, click "Stop".
Wireless Data Transceiver E850-DTU(4440-GPRS) datasheet
Copyright ©2012–2018，成都亿佰特电子科技有限公司 5
At this time, you can see the current device address, for the "auto refresh" process, you can perform
the switch output control, the switch input read, the analog input read.
1.2.2 Network control
At the website: http://yun.cdebyte.com/www/data_direct ，The acquisition can be controlled by
commands, and the command supports the Modbus TCP/RTU protocol.
Wireless Data Transceiver E850-DTU(4440-GPRS) datasheet
Copyright ©2012–2018，成都亿佰特电子科技有限公司 6
2. Introduction
E850-DTU (4440-GPRS) is a network IO product that supports 4 switch inputs (default dry
contact), 4 analog inputs, and 4 relay outputs. Support Modbus TCP/RTU protocol. The product is
highly easy to use and can be easily and quickly integrated into your system for GPRS-based remote
control.
2.1 Parameters
Item
Description
Wireless parameter
Standard frequency band
850/900/1800/1900MHz
Hardware parameter
Size (H*W*D)
172*107*29mm
Weight
-
Working temperature
-20℃~+70℃
Storage temperature
-40℃~+85℃
Working humidity
5%~95%
Storage humidity
1%~95%
Working voltage
8V~28V
Current collection range
0mA~20mA
Wireless Data Transceiver E850-DTU(4440-GPRS) datasheet
Copyright ©2012–2018，成都亿佰特电子科技有限公司 7
Accuracy
0.2%
Data interface
RS485：1200~115200bps
Software parameter
Network type
GPRS
Configuration command
Modbus TCP/RTU
Network protocol
Modbus TCP/RTU
Working mode
Master mode, slave mode
Data transmission mode
TCP Client
2.2 Size and interface
Wireless Data Transceiver E850-DTU(4440-GPRS) datasheet
Copyright ©2012–2018，成都亿佰特电子科技有限公司 8
No.
Definition
Function
Description
1
RS485 G
Signal ground
Signal ground, can be no onnected
2
RS485 A
RS485 A
RS485 A connects with device A
3
RS485 B
RS485 B
RS485 B connects with device B
4
DC-IN -
Power input negative
Power ground
5
DC-IN +
Power input positive
Power input, DC 8V~28V, recommended 12V/24V
6
DC-IN
DC 5.5*2.1mm
Power input, DC 8V~28V, recommended 12V/24V
7
Ground screw
Ground
Ground
8
Reload
Reset button
Long press 5s to work
9
SIM Card slot
SIM Card slot
Insert SIM card to connect network
10
ANT
Antenna interface
GPRS antenna
Signal interface
1
AI 1
Analog input 1
Analog input pin, forming an input with AIG
2
AIG
Analog input ground
Can be paired with AI 1
3
AI 2
Analog input 2
Analog input pin, forming an input with AIG
4
AIG
Analog input ground
Can be paired with AI 2
5
AI 3
Analog input 3
Analog input pin, forming an input with AIG
6
AIG
Analog input ground
Can be paired with AI 3
7
AI 4
Analog input 4
Analog input pin, forming an input with AIG
8
AIG
Analog input ground
Can be paired with AI 4
9
DI 1
switch input 1
Forming dry contact with DIG
10
DIG
switch input ground
Can be paired with DI 1
11
DI 2
switch input 2
Forming dry contact with DIG
Wireless Data Transceiver E850-DTU(4440-GPRS) datasheet
Copyright ©2012–2018，成都亿佰特电子科技有限公司 9
12
DIG
switch input ground
Can be paired with DI 2
13
DI 3
switch input 3
Forming dry contact with DIG
14
DIG
switch input ground
Can be paired with DI 3
15
DI 4
switch input 4
Forming dry contact with DIG
16
DIG
switch input ground
Can be paired with DI 4
17
NC 1
Relay 1 normally
closed pin
Can be paired with common end of relay 1
18
COM 1
Common end of relay
1
Can be paired with other pins of relay 1
19
NO 1
Relay 1 normally
open pin
Can be paired with common end of relay 1
20
NC 2
Relay 2 normally
closed pin
Can be paired with common end of relay 2
21
COM 2
Common end of relay
2
Can be paired with other pins of relay 2
22
NO 2
Relay 2 normally
open pin
Can be paired with common end of relay 2
23
NC 3
Relay 3 normally
closed pin
Can be paired with common end of relay 3
24
COM 3
Common end of relay
3
Can be paired with other pins of relay 3
25
NO 3
Relay 3 normally
open pin
Can be paired with common end of relay 3
26
NC 4
Relay 4 normally
closed pin
Can be paired with common end of relay 4
27
COM 4
Common end of relay
4
Can be paired with other pins of relay 4
28
NO 4
Relay 4 normally
open pin
Can be paired with common end of relay 4
LED
1
AI 1
Analog input channel
1 indication
Green LED, large enough input (≥0.5mA) lights up
2
AI 2
Analog input channel
2 indication
Green LED, large enough input (≥0.5mA) lights up
3
AI 3
Analog input channel
3 indication
Green LED, large enough input (≥0.5mA) lights up
4
AI 4
Analog input channel
4 indication
Green LED, large enough input (≥0.5mA) lights up
5
DI 1
switch input channel
1 indication
Green LED, lights up when DI 1 and DIG are shorted
6
DI 2
switch input channel
2 indication
Green LED, lights up when DI 2 and DIG are shorted
7
DI 3
switch input channel
Green LED, lights up when DI 3 and DIG are shorted
Wireless Data Transceiver E850-DTU(4440-GPRS) datasheet
Copyright ©2012–2018，成都亿佰特电子科技有限公司 10
3 indication
8
DI 4
switch input channel
4 indication
Green LED, lights up when DI 4 and DIG are shorted
9
DO 1
Relay 1 output
indication
Green LED, lights up when NO 1 and COM 1 close
10
DO 2
Relay 2 output
indication
Green LED, lights up when NO 1 and COM 1 close
11
DO 3
Relay 3 output
indication
Green LED, lights up when NO 1 and COM 1 close
12
DO 4
Relay 4 output
indication
Green LED, lights up when NO 1 and COM 1 close
13
NET
Network indication
Yellow LED, Constantly bright after entering network
14
DATA
Serial data indication
Yellow LED, Lights up when the RS485 interface has
data transmission (blinking)
15
WORK
Work/Reset
indication
Yellow LED，Regular blinking / quick blinking after
successful reset
16
PWR
Power indication
Red LED, Constantly bright
Note: Grounding: It is recommended to connect the case to the ground
2.3 Reload button description
Long press 5S is valid, after the reset is successful, the WORK led blinks quickly, and the Modbus
device address, RS485 serial port baud rate and parity bit are restored to the factory settings.
3. Modbus
3.1 Register Address Table
Register Address Table（Function code: 0x01H、0x05H、0x0FH、0x03H、0x06H、0x10H）
Register
address
Number of
registers
Register properties
Register
type
Register value
range
Function code
supported
00017
(0x0010)
1
DO1 switch output
Read/Write
0x0000 or
0xFF00（0x05
function code）
0-1（0x01、
0x0F function
code）
0x01
0x05
0x0F
00018
(0x0011)
1
DO2 switch output
Read/Write
00019
(0x0012)
1
DO3 switch output
Read/Write
00020
(0x0013)
1
DO4 switch output
Read/Write
Reserve
10017
(0x0010)
1
DI1 switch intput
Read only
0-1
0x02
10018
(0x0011)
1
DI2 switch intput
Read only
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