Aspar Sdm-8ao 8 Analog Outputs Expansion Module User Manual (+ PDF)

aspar SDM-8AO 8 Analog Outputs Expansion Module User Manual

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This manual will help you with proper support and proper operation of the device. The information contained in this manual have been prepared with utmost care by our professionals and serve as a description of the product without incurring any liability for the purposes of commercial law. This information does not release you from the obligation of own judgment and verifica tion. We reserve the right to change product specifications without notice. Please read the instructions carefully and follow the recommendations contained therein.

WARNING!
Failure to follow instructions can result in equipment damage or impede the use of the hardware or software.

Contents hide

1 Safety rules

2 Module Features

3 Communication configuration

4 Switches

5 Front panel removing

6 Indicators

7 Module Connection

8 Setting output mode

9 Opening the housing

10 Modules Registers

11 Configuration software

12 Documents / Resources

12.1 References

13 Related Posts

Safety rules

Before first use, refer to this manual
Before first use, make sure that all cables are connected properly
Please ensure proper working conditions, according to the device specifications (eg: supply voltage, temperature, maximum power consumption)
Before making any modifications to wiring connections, turn off the power supply.

Module Features

Purpose and description of the module
The SDM-8AO module has a set of 8 analog outputs that could work as a current output (0-20mA or 4-20mA) or as a voltage output (0-10V). Setting the output curent or voltage value is done via RS485 (Modbus protocol), so you can easily integrate the module with popular PLCs, HMI or PC equipped with the appropriate adapter. This module is connected to the RS485 bus with twisted-pair wire. Communication is via MODBUS RTU or MODBUS ASCII. The use of 32 bit ARM core processor provides fast processing and quick communication. The baud rate is configurable from 2400 to 115200 The module is designed for mounting on a DIN rail in accordance with DIN EN 5002. The module is equipped with a set of LEDs used to indicate the status of inputs and outputs useful for diagnostic purposes and helping to find errors. Module configuration is done via USB by using a dedicated computer program. You can also change the parameters using the MODBUS protocol.

Technical Specifications

Power Supply	Voltage	10-30 VDC; 10-28VAC
	Maximum Current^*	DC: 52 mA @ 24VDC AC: 62 mA @ 24VAC
	Maximum power consumption	DC: 1,25W; AC: 1,5VA
Outputs	No of outputs	8
	Voltage output	0V do 10V ( resolution 1.5mV)
	Current output	0mA do 20mA ( resolution 5μA)
	Current output	4mA do 20mA (value in ‰ – 1000 steps) (resolution 16μA)
	Measurement resolution	12 bits
	ADC processing time	16ms / channel
Temperature	Work	-10 °C – +50°C
Temperature	Storage	-40 °C – +85°C
Connectors	Power Supply	2 pins
	Communication	3 pins
	Outputs	2x 10 pins
	Configuration	Mini USB
Size	Height	110 mm
	Length	62 mm
	Width	88 mm
Interface	RS485	Up to 128 devices

Dimensions of the product
Look and dimensions of the module are shown below. The module is mounted directly to the rail in the DIN industry standard. Power connectors, communication and IOs are at the bottom and top of the module. USB connector configuration and indicators located on the front of the module.

Communication configuration

Grounding and shielding
In most cases, IO modules will be installed in an enclosure along with other devices which generate electromagnetic radiation. Examples of these devices are relays and contactors, transformers, motor controllers etc. This electromagnetic radiation can induce electrical noise into both power and signal lines, as well as direct radiation into the module causing negative effects on the system. Appropriate grounding, shielding and other protective steps should be taken at the installation stage to prevent these effects. These protective steps include control cabinet grounding, module grounding, cable shield grounding, protective elements for electromagnetic switching devices, correct wiring as well as consideration of cable types and their cross sections.

Network Termination
Transmission line effects often present a problem on data communication networks. These problems include reflections and signal attenuation. To eliminate the presence of reflections from the end of the cable, the cable must be terminated at both ends with a resistor across the line equal to its characteristic impedance. Both ends must be terminated since the direction of propagation is bidirectional. In the case of an RS485 twisted pair cable this termination is typically 120 Ω.

Setting Module Address in RS485 Modbus Network
The following table shows how to set switch to determine the address of the module. The module address is set with the switches in the range of 0 to 127. Addresses From 128 to 255 can by set via RS485 or USB.

Switch	Address
SW1	+1
SW2	+2
SW3	+4
SW4	+8
SW5	+16
SW6	+32
SW7	+64

Ex. if switches 1, 3 and 5 are on than module addres is:
Address = 1 + 4 + 16 = 21

Types of Modbus Registers
There are 4 types of variables available in the modul

Typ e	Beginning address	Variable	Access	Modbus Command
1	00001	Digital Outputs	BitRead & Write	1, 5, 15
2	10001	Digital Inputs	Bit Read	2
3	30001	Input Registers	Registered Read	3
4	40001	Output Registers	Registered Read & Write	4, 6, 16

Communication settings
The data stored in the modules memory are in 16-bit registers. Access to
registers is via MODBUS RTU or MODBUS ASCII.

Default settings
You can restore the default configuration by the switch SW8 (see 3.5.2 – Restore the default configuration)

Baud rate	19200
Parity	No
Data bits	8
Stop bits	1
Reply Delay [ms]	0
Modbus Type	RTU

Restore the default configuration
To restore the default configuration:

turn off the power
turn on the switch SW8
turn on the power
when power and communication LED start blinking alternately than turn off the switch SW8
Caution! After restoring the default configuration all values stored in the registers will be cleared as well.

Configuration registers

Modbus	Dec	Hex	Name	Values
40003	2	0x02	Baud rate	0 – 24001 – 48002 – 96003 – 192004 – 384005 – 576006 – 115200other – value * 10
40005	4	0x04	Parity	0 – none1 – odd2 – even3 – always 14 – always 0
40004	3	0x03	Stop Bits LSB	1 – one stop bit 2 – two stop bits
40004	3	0x03	Data Bits MSB	7 – 7 data bits8 – 8 data bits
40006	5	0x05	Response delay	Time in ms
40007	6	0x06	Modbus Mode	0 – RTU1 – ASCII

Watchdog function
This 16-bit register specifies the time in milliseconds to watchdog reset. If module does not receive any valid message within that time, all Digital and Analog Outputs will be set to the default state. This feature is useful if there is an interruption in data transmission and for security reasons. Output states must be set to the appropriate state in order to assure the safety of persons or property. The default value is 0 milliseconds which means the watchdog function is disabled.

Switches

Switch	Function	Description
1	Module address +1	Setting module address from 0 to 127
2	Module address +2
3	Module address +4
4	Module address +8
5	Module address +16
6	Module address +32
7	Module address +64
8	Restoring default settings	Restoring default settings(see 3.5.2 – Restore the default configuration).

Front panel removing

To remove the panel and gain access to the switch, you must pry open the panel using a thin tool (eg a small screwdriver) as in the picture below.

Indicators

Indicator	Description
Power supply	LED indicates that the module is correctly powered.
Communication	The LED lights up when the unit received the correct packet and sends the answer.
Outputs state	LED indicates that the output is on.

Module Connection

Analog outputs

Power supply of analog outputs

Communication, power supply

Setting output mode

Each of outputs can be configured as a voltage outputs or a current outputs. To change the operating mode in addition to configuration changes by using the program or via RS485, also set the jumpers inside the module as shown below

Jumper	Description
	Current output (default)
	Voltage output

Opening the housing

Remove the clip by pressing it and moving toward the center of the housing
Separate the housing gently tilting the clamps using a thin tool.

Modules Registers

Modbus	Dec	Hex	Register Name	Access	Description
30001	0	0x00	Version/Type	Read	Version and Type of the device
30002	1	0x01	Switches	Read	Switches state
40003	2	0x02	Baud rate	Read & Write	RS485 baud rate
40004	3	0x03	Stop Bits & Data Bits	Read & Write	No of Stop bits & Data Bits
40005	4	0x04	Parity	Read & Write	Parity bit
40006	5	0x05	Response Delay	Read & Write	Response delay in ms
40007	6	0x06	Modbus Mode	Read & Write	Modbus Mode (ASCII or RTU)
40009	8	0x08	Watchdog	Read & Write	Watchdog
40033	32	0x20	Received packets LSB	Read & Write	No of received packets
40034	33	0x21	Received packets MSB	Read & Write	No of received packets
40035	34	0x22	Incorrect packets LSB	Read & Write	No of received packets with error
40036	35	0x23	Incorrect packets MSB	Read & Write	No of received packets with error
40037	36	0x24	Sent packets LSB	Read & Write	No of sent packets
40038	37	0x25	Sent packets MSB	Read & Write	No of sent packets
30051	50	0x32	Outputs	Read	Bit is set if value ≠ 0
40053	52	0x34	Analog output 1	Read & Write	Value of analog output: in mV for voltage output (max 10240) in μA for current output 0 – 20mA (max 20480) in ‰ for current output 4-20mA (max 1000)
40054	53	0x35	Analog output 2	Read & Write
40055	54	0x36	Analog output 3	Read & Write
40056	55	0x37	Analog output 4	Read & Write
40057	56	0x38	Analog output 5	Read & Write
40058	57	0x39	Analog output 6	Read & Write
40059	58	0x3A	Analog output 7	Read & Write
40060	59	0x3B	Analog output 8	Read & Write
40061	60	0x3C	Default output 1 value	Read & Write	Default value of output set when power is on or when watchdog reset occurs
40062	61	0x3D	Default output 2 value	Read & Write
40063	62	0x3E	Default output 3 value	Read & Write
40064	63	0x3F	Default output 4 value	Read & Write
40065	64	0x40	Default output 5 value	Read & Write
40066	65	0x41	Default output 6 value	Read & Write
40067	66	0x42	Default output 7 value	Read & Write
40068	67	0x43	Default output 8 value	Read & Write
40069	68	0x44	Output 1 setting	Read & Write	Setting of output mode:
70	69	0x45	Output 2 setting	Read & Write	Setting of output mode:

Modbus	Dec	Hex	Register Name	Access	Description
40071	70	0x46	Output 3 setting	Read & Write	0 – output disable 1 – voltage output2 – current output 0-20mA3 – current output 4-20mA
40072	71	0x47	Output 4 setting	Read & Write
40073	72	0x48	Output 5 setting	Read & Write
40074	73	0x49	Output 6 setting	Read & Write
40075	74	0x4A	Output 7 setting	Read & Write
40076	75	0x4B	Output 8 setting	Read & Write

Bit access

Modbus Address	Dec Address	Hex Address	Register name	Access	Description
801	800	0x320	Output 1	Read	If voltage or current is greater than 0 then according bit is set.
802	801	0x321	Output 2	Read
803	802	0x322	Output 3	Read
804	803	0x323	Output 4	Read
805	804	0x324	Output 5	Read
806	805	0x325	Output 6	Read
807	806	0x326	Output 7	Read
808	807	0x327	Output 8	Read

Configuration software

Modbus Configurator is software that is designed to set the module registers
responsible for communication over Modbus network as well as to read and write the current value of other registers of the module. This program can be a convenient way to test the system as well as to observe real-time changes in the registers.
Communication with the module is done via the USB cable. The module does not require any drivers.

Configurator is a universal program, whereby it is possible to configure all available modules.

Manufactured for: Aspar s.c. ul. Oliwska 112
80-209 Chwaszczyno
POLAND
[email protected]
www.ampero.eu
tel. +48 58 351 39 89; +48 58 732 71 73