Isolated ModBus RTU 4-20mA output.

DAT10024

• Isolated 4 Channel Output.
• 4-20mA, 0-20mA.
• 0-10V, 2-10V.
• Modbus RTU, Modbus ASCII.
• PC or DIP Switches Programmable
• Up Scale, Down scale Burn Out.
• Baud rate up to 115.2Kbps.
• Passive and Active Current Outputs.
• Watch dog timer
• Each channel is Isolated.

General Description

The DAT10024 Isolated ModBus RTU 4-20 mA output module is a four channel Modbus RTU Isolated Current and Voltage output converter. The DAT10024 can also operate with Modbus ASCII and has the option to select a 0-10 Vdc output. Each output channel can be set up independently i.e. Channel 0 could be 0-10 V and Channel 1 could be 4-20 mA. The power up settings can be configured differently per independent Channel. The 4-20 mA analog output can be Passive or Active. A watch dog timer is available to ensure plant safety.
The DAT10024 is set up with either the free PC based software available on our download page or with the use of the DIP Switches. The DIP switch settings can be found in the user guide or on the 3000-10000 software as the wizard settings. The wizard settings allow you to set the switches as per the Address, Baud-rate, RTU or ASCII, and the parity.

INPUT	OUTPUT	POWER SUPPLY
Modbus RTU.	4-20mA, 0-20mA.	Power Supply Voltage 20-30Vdc
Modbus ASCII.	0-10 Vdc 2-10 Vdc.	Reverse polarity protection 60Vdc
CURRENT CONSUMPTION	CONFIGURATION	ISOLATION
Between 60 and 115 mA	PC Programmable	Between Input/Comms/Power Supply 1500Vac.
	DIP Switch Programmable
EMC	HOUSING	TEMPERATURE
For Industrial environments	Material self-extinguishing	Operating Temperature 14°F +140°F -10°C +60°C
Immunity EN 61000-6-2	Dimensions W x H x T 4.1/4" x 4 1/2" x 2 1/4"	Storage Temperature -40°F +185°F-40°C +85°C
Emission EN 6100-6-4	106 x 112x x 57 mm	Humidity (non condensing) 0-90%
	Weight 7 oz 200 g

DAT10024 Datasheet

Buy Online
Applications
Drawings
DAT10024 User Guide
Modbus Analog Output
Application Note Frequently Asked Questions

Specifications

Output type:	Min	Max
Current mA	0 mA	+20 mA
Voltage Vdc	0 Vdc	+10 Vdc

Output Accuracy

Current	± 10 uA
Voltage	± 5 mV
Thermal Drift	± 0.01%/℉
Load Resistance
Voltage	> 5KΩ
Current	< 500Ω
Auxiliary Voltage
4 Channels	> 13 Vdc @ 20 mA
Response Time
from 10% to 90$	15 ms
Sample Time	50 ms
Data Transmission
Baud rate	2400bps to 115.2 Kbps
Max distance	4000ft 1.2 Km.

Power supply
Power supply voltage	10 .. 32 Vdc
Reverse polarity protection	60 Vdc max
Current Consumption	150 mA Max

Isolation
On all sides	1500 Vac 50Hz, 1Min

Environmental Conditions
Operating Temperature	-4℉ +140℉
	-20℃ +60℃
Storage Temperature	-40℉ +185℉
	-40℃ +85℃
Humidity (not condensed)	0 to 90 %
Max Altitude	2000 m
Installation	Indoor
Category of installation	II
Pollution Degree	2

Material	Self-extinguish plastic
Ingress Protection	IP20
Wiring Diameter	AWG 14-18 0.8÷2.1 mm2
Tightening Torque	0.5 N m
Mounting	DIN Rail EN50022
Weight	0.45 lbs. 200 g.

EMC	0.45 lbs. 200 g.
Immunity	EN 61000-6-2
Emission	EN 61000-6-4

DAT10024: Communication Protocols

The DAT10024 is designed to work with the Modbus RTU and Modbus ASCII protocol.
These standard protocols allow the DAT10024 isolated Modbus RTU to 4-20mA device to work with most PLC's DCS's and SCADA applications.

DAT10024 User Instructions

Before installing the DAT10024, it is important to read the Installation Instructions.
There are two methods to configure the DAT10024 by either the 3000/10000 configuration software available on the CD shipped with the DAT10024 or available from the download page on www.datexel.com. The other method is the DIP Switches available on the DAT10024. Selection information is available on the user guide or the software wizard in the 3000/10000 Software.
Should you choose the Software method and the communication setting are unknown then simply link the INIT to REF terminal and recycle the power and the communication settings are defined as below.

Title	With INIT	Datexel default
Mode	Modbus RTU	Modbus RTU
Baud-rate	9600 bps	3840 bps
Parity	None	None
Number of bit	8	8
Stop Bit	1	1
Address	1	1

DAT10024 LED Signaling

LED	Color	State	Description
PWR	Green	On	Device Powered
PWR	Green	Off	Device not Powered
PWR	Green	Blink	1 Sec Watch Dog alarm condition
RX	Yellow	Blink	Data on receiving line of RS485
RX	Yellow	Off	No Data on receiving line of RS485
TX	Yellow	Blink	Data on transmission line of RS485
TX	Yellow	Off	No Data on transmission line of RS485

DAT10024: Installation Instructions

The DAT10024 can be mounted horizontally on the DIN rail.
When the converters are mounted next to each other it will be necessary to separate them by 1/4" if the temperature is above 113 ℉ or 45 ℃. It may also be necessary if the power supply is above 18 Vdc.
Allow for adequate ventilation and avoid positioning the DAT10024 isolated Modbus RTU to 4-20mA close to equipment generating heat or vibration.
Do not install the isolated Modbus RTU to 4-20mA converter near power sources such as motors, induction ovens or inverters.
It is necessary to use shielded cable on the RS485 communication lines.

Isolated ModBus RTU 4-20 mA output module Wiring Diagram

Connection Terminals

Power Supply
Positive	V+
Negative	V-
Modbus RS485	D- and D+ and Screen
INIT	INIT to REF Link
Analog Output
Channel 0 Passive Current	I0 and GNA0
Channel 1 Passive Current	I1 and GNA1
Channel 2 Passive Current	I2 and GNA2
Channel 3 Passive Current	I3 and GNA3
Channel 0 Active Current	I0 and GNA0
Channel 1 Active Current	I1 and GNA1
Channel 2 Active Current	I2 and GNA2
Channel 3 Active Current	I3 and GNA3
Channel 0 Voltage	I0 and GNA0
Channel 1 Voltage	I1 and GNA1
Channel 2 Voltage	I2 and GNA2
Channel 3 Voltage	I3 and GNA3

Isolated ModBus RTU 4-20 mA output module Power Supply

Isolated ModBus RTU 4-20 mA output configuration.

Isolation Structure

The DAT10024 Isolated ModBus RTU 4-20 mA output module has all way Isolation.

Isolated ModBus RTU 4-20 mA output module Isolation Structure.

Dimensions

The DAT10024 is a 6 DIN standard and has measurement 4.17" 106 mm wide, 4.4" 112 mm height and the depth is 2.25" 57 mm.

How to order the DAT10024 Isolated ModBus RTU 4-20 mA output module

The DAT10024 can be supplied with customer requirements. If no request is made it will be supplied Modbus RTU, Parity none, Baud-rate 38400 bps, 1 stop bit, Modality None.

DAT10024	Modbus RTU	Current

Column 1 Product Name	DAT10024
Column 2 Input type	Modbus RTU or ASCII
Column 3 Output	Voltage or Current

Applications

4-20 mA output from Modbus RTU
0-10 V output from Modbus RTU

Frequently Asked Questions

What is a 4-20 mA Passive output or a Active Output? Does the DAT10024 have Passive outputs or Active Outputs.
What resolution output does the Isolated ModBus RTU 4-20 mA have?

Back to General Description

Application Note Modbus RTU DAT10024 with a Voltage and Current output.
Printed Version

Set up the DAT10024 with Software or DIP Switches.

The DAT10024 comes by default with the following settings.
Address 1, RTU, Parity None, Baud Rate 38400.
The DIP Switches can be changed to your particular requirements. The options for the DIP Switch setting can be found on the Datasheet or the DAT3000-10000 software under the Wizard tab. For the above settings SW1 should have 1,2,3,4 and 6 on. SW2 Should just have 1on.

Terminal Connections for Modbus RTU Analog Output Module.

Connect 24 Vdc to V+ and V-.
Connect RS485 to D+ and D-.
Connect a Multimeter on I0 and AUX0 for the 4-20mA output for channel 0.
Connect a Multimeter on V0 and GND0 for the 0-10V dc output for channel 0.

It is advisable to use the DAT3580 to connect the DAT10024 to the PC. The advantage of using the DAT3580 is that it will isolate your PC from the DAT10024. The DAT3580 options are USB, Ethernet and RS232. If the DAT3580USB version is used, install the USB drivers. If the DAT3580MBTCP or the DAT3580GW are used, make sure the Ethernet parameters are compatible with the net and transmission of data over port 502 is allowed.

Modbus RTU Slave to Voltage and Current output.

Set-up PC.

Download the 3000-10000 Software from www.datexel.com download page.
Close all other software.
UnZIP the Modbus_3000_10000_setup software.
Run the 3000-10000 software.
To start the software click the English version.

Start page for the Modbus 3000-10000 software

Set Up Communication.

The software should automatically select the correct communication port. It is possible to override the communication port or refresh if you change the physical port.
Select the communication port setting as per the DIP Switches Baud rate 38400bps, RTU, Data Bit 8, Stop Bit1, Parity None. Click Open communication. The Port Status will change to green.

Communication screen for the Modbus 3000-10000 software

Selecting the Modbus RTU Slave DAT10024.

The green light only indicates the port is open. Even if the settings are incorrect the light will turn green.
Select Model and the drop down navigation will appear.
Select DAT10024 for Current or Voltage.

Selecting the DAT10024 Isolated Modbus RTU

Setting the Address of the DAT10024 Modbus Slave.

Change the Address to connect to 1 or whatever you have selected on the DIP Switch.
Click "Read data" (Single poll).
The screen should now display the below screen.
If there is a function error, no CRC match, check Baud rate, RS485 connection or Modbus Slave Address.
This needs to be fixed before further progress. Recheck DIP Switch settings to the wizard or the DIP Switch setting on the Datasheet.
If all else fails connect the INIT link. Reset the power, close the port, set the comms port settings to 9600bps, RTU, Data Bit 8, Stop Bit1, Parity None and reopen the port. Select DAT10024 and then read data again.

Selecting the Voltage output on the DAT10024

If communication is established, the screen below should appear. You will see on the right side the DIP Switch settings Comm parameters.
Under the output type select Voltage or Current. For this example we selected Voltage.
Below the Measures tab, type the desired output. Then click Write.
Connect a Multimeter to the correct output and check that the DAT10024 is outputting the desired Voltage.

Selecting Voltage output for the Modbus RTU DAT10024.

Providing a 4-20mA output from the DAT10024 Modbus Slave.

To provide a 4mA output type under the Output type label and select mA for Current.
Below the Measures tab, type 4.000. Then click Write.
Connect a Multimeter to the correct output and check that the DAT10024 is outputting the desired Current.

Selecting 4mA output for the Modbus RTU DAT10024.

Address The actual Address of the DAT10024 connected.
Baud rate The actual baud rate of the DAT10024 connected.
Parity The actual parity mode of the DAT10024 connected.
N°Bit The actual number of bit selection of the DAT10024 connected.
Mode The actual Modbus modality (RTU or ASCII) set for the DAT10024 connected
Name The string read from the DAT10024 of 4 ASCII characters used to name it example DAT10024.
FW Version The firmware version read from the DAT10024.
WTD (x0.5) The watchdog time read from the DAT10024 is in steps of 0.5 seconds.
Delay (x1 ms) The delay time between the reception of a query and transmission of the response. Expressed as steps of 1 millisecond.
Button Wdt_en Indicates if the bit to enable the watchdog time of the device has been set: red indicates the bit is set, grey indicates the bit is not set.
Button Wdt_ev Indicates if the watchdog timer event is occurred: red if the event occurs, grey if the event has not occurred. This condition is also signaled by the blinking of the led “PWR” of the device and the safe state of the digital outputs.
Button Pup_ev Indicates if the Power up event has occurred: red if the event has occurred, grey if the event has not occurred. This condition is also signaled by the power-up state of the digital outputs.