Resource Data Management RS485 Modbus Interface
USB to RS485 Modbus® Interface
Resource Data Management
Modbus network support can be enabled using the RDM USB to RS485 Modbus network adaptor, part number PR0623/ PR0623 DIN. A single adapter is supported by the DMTouch and allows for two RS485 Modbus networks, with up 32 devices on each network line. Similarly when used in conjunction with the intuitive plant TDB, it can also support the two network lines with 32 devices on each.
Support is provided for a range of Modbus devices and new devices are being added continuously. Contact RDM Technical support to obtain the most up to date list of supported devices.
Note: This feature requires Data Manager software version V1.53.0 or above.
* Optional dependent on application
Mechanical
Dimensions 35 x 22 x 260mm
Weight 50g (1.7 oz)
Mechanical
Dimensions 112 x 53 x 67mm
Weight 110g (3.8 oz)
RS485 Configuration
Note the RS485 configuration defaults of the Adapters are the following:
Baud rate 9600
Data bits 8
Parity No
Stop Bits 1
When connected to a DMTouch with software V3.1 or above or an Intuitive TDB with software V4.1 or above the adapter can be configured with the following set up.
| Baud Rate | Data Bits | Parity | Stop Bits |
| 1200 | 8 | E | 1 |
| 1200 | 8 | N | 2 |
| 2400 | 8 | E | 1 |
| 2400 | 8 | N | 2 |
| 4800 | 8 | E | 1 |
| 4800 | 8 | N | 2 |
| 9600 | 8 | E | 1 |
| 9600 | 8 | N | 2 |
| 19200 | 8 | E | 1 |
| 19200 | 8 | N | 2 |
| 38400 | 8 | E | 1 |
| 38400 | 8 | N | 2 |
Specifications
DC Voltage 5V
Rated Current 0.1A (USB Powered)
Adding a Modbus Device
DMTouch
On the DMTouch the adapter/ software needs to be activated before it will communicate to the Modbus devices. Please consult RDM sales for activation.
When activated, it will open a number of useable ‘templates’ for devices to communicate with the DMTouch.
Currently the following Modbus® devices are supported:
| Modbus® Energy Meters | SIRIO Energy Meter |
| 4MOD Pulse Counter | Socomec Diris A20 |
| AcuDC 240 | Socomec Diris A40 |
| AEM33 Power Monitor | SPN ILC Energy Meter |
| Autometer IC970 | VIP396 Energy Meter |
| Carlo Gavazzi EM21 | VIP396 Energy Meter (IEEE) |
| Carlo Gavazzi EM24-DIN | RDM Energy Meter |
| Carlo Gavazzi WM14 | |
| Compact NSX | |
| Countis E13, E23, E33, E43, E53 | Other Modbus® Devices |
| Cube 350 | Gas Detection |
| Dent Powerscout Energy meter | CPC Infrared RLDS Unit 1 |
| EMM R4h Energy meter | TQ4200 Mk 11 (16 Chan) |
| Enviro ENV900 | TQ4200 Mk II (24 Chan) |
| Enviro ENV901 | TQ4000 (4 Chan) |
| Enviro ENV901-THD | TQ4300 (12 Chan) |
| Enviro ENV903-DR-485 | TQ4300 (16 Chan) |
| Enviro ENV910 Single Phase | TQ8000 (24 Chan) |
| Enviro ENV910 Three Phase | TQ8000 (16 Chan) |
| Flash D Power Monitor | TQ8000 (8 Chan) |
| Flash D Power Monitor (3 Wire ) | TQ100 (30 Chan) |
| ICT Energy Meter EI | Safety Gas Detection System |
| ICT Energy Meter EI Flex – 1phase | Carel Gas Detection |
| ICT Energy Meter EI Flex – 3phase | MGS Gas 404A Detector |
| IME Nemo 96HD | Others |
| Integra 1530 | Toshiba FDP3 A/C Interface |
| Integra Ci3/Ri3 Energy Meter | Polin Bakery Controller |
| Janitza UMG 604 | ISpeed Inverter Drive |
| Janitza UMG 96S | RESI Dali Lighting System |
| Kamstrum Multical 602 | Sabroe Unisab III |
| Measurlogic DTS | AirBloc SmartElec2 |
| Nautil 910 Energy Meter | Emerson Control Techniques VSD |
| Schneider Masterpact NW16 H1 | Daikin ZEAS Remote Condensing units 11- 26 |
| Schneider PM710 | NXL Vacon Inverter Template |
| Schneider PM750 | NSL Vacon Inverter Template |
| Shark Energy Meter |
Note: Please be aware that the templates listed above were generated on request and designed to the customers’ requirements. Please contact RDM Technical Support for information regarding the template.
Furthermore, if you have a Modbus® device which is not listed please contact RDM Technical Support.
The USB dongle is not ‘plug & play’, for the DMTouch to recognise the device, it must be present when powered up (or restarted).
To add a Modbus device, log in and navigate through the following menus:
Selecting the ‘Add device’ option, will show the following page:
Within the page, all fields will need to be entered:
Device Type: Select Modbus/ USB device
Name: The six character name which appears on the ‘device list’
Alias: Enter an appropriate description for the device
Type: Select the device from the drop down menu.
USB Line: Select either Line 1 or Line 2, depending on the network line the controller is physically connected.
Modbus Address: Enter the Modbus address of the device.
Once details are entered, the Modbus controller will show in the device list.
Intuitive Plant TDB
With the Intuitive Plant TDB, the Modbus USB is already activated. Therefor similar to the dmTouch, the adapter needs to be present when the controller is booting up (restart). Currently, the following Modbus devices are listed within the intuitive controller:
| Device | Device |
| Flash D Power Mon (4 Wire) | Schneider PM710 |
| VIP396 Energy Meter | Flash D Power Mon (3 Wire) |
| 4MOD Pulse Counter | Sirio Energy Meter |
| Autometer IC970 | VIP396 Energy Meter (IEEE) |
| Socomec Diris A20 | Shark Energy Meter |
| AEM33 Power Monitor | Powerscout |
| Enviro ENV901 | Enviro ENV900 |
| AEM33 Power Monitor |
Note: Please be aware that the templates listed above were generated on request and designed to the customers’ requirements. Please contact RDM Technical Support for information regarding the template.
Furthermore, if you have a Modbus® device which is not listed please contact RDM Technical Support.
To add a Modbus device, log in and navigate through the following menus: Network – Add Device
Within the page, all fields will need to be entered:
Device Type: Select Modbus/ USB device
Name: The six character name which appears on the ‘List’ page
Type: Select the device from the drop down menu.
Modbus Address: Enter the Modbus address of the device.
Network Line: Select either Line 1 or Line 2, depending on the network line the controller is physically connected.
Once details are entered, the Modbus controller will appear within the ‘List’ of devices under Network – List.
Disclaimer
The specifications of the product detailed in this document may change without notice. RDM Ltd shall not be liable for errors or omissions, for incidental or consequential damages, directly or indirectly, in connection with the furnishing, performance or misuse of this product or document
Modbus® is a registered trademark of the Modbus Organisation, Inc.
Revision History
| Revision | Date | Changes |
| 1.0 | 08/09/2015 | First document |
| 1.0a | 03/05/2017 | New documentation format. |
| 1.0b | 18/12/2019 | Update to US Offices |
| 1.0c | 03/02/2022 | USB Modbus setup table added |
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Visit www.resourcedm.com/support for more information on RDM solutions, additional product documentation and software downloads.
While every effort is made to ensure the information given within this document is accurate, Resource Data Management Ltd shall not be liable for errors or omissions, for incidental or consequential damages, directly or indirectly, in connection with the furnishing, performance or misuse of this product or document. All specifications are subject to change without notice.
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Documents / Resources
 | Resource Data Management RS485 Modbus Interface [pdf] User Guide RS485 Modbus Interface, RS485, Modbus Interface, Interface |
