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SfAR-S-8TO User Manual

www.ismacontrolli.com

DMP277en | 3rd Issue rev. 2 | 05/2022

page 7 of 20

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4 Communication

4.1 Grounding and Shielding

In most cases, I/O modules will be installed in an enclosure along with the other devices,

which generate electromagnetic radiation. Relays, contactors, transformers, motor

invertors, etc., are examples of such devices. Radiation can induce electrical noise into

both power and signal lines, as well as direct radiation into the module. Whether or not

the SfAR modules are immune to such effects, the interferences must be suppressed at

their source if possible to ensure the proper functioning of the entire system.

Appropriate grounding, shielding and other protective steps should be taken at the

installation stage to prevent these effects. It is recommended to at least follow the rules

below:

line power cables must be routed with spatial separation from signal and data

transmission cables;

aAnalog and digital signal cables should also be separated;

it is recommended to use shielded cables for analog signals, cable shields should not

be interrupted by intermediate terminals;

the shielding should be earthed directly after the cable enters the cabinet.

It is recommended to install interference suppressors when switching inductive loads

(e.g., coils of contactors, relays, solenoid valves). RC snubbers or varistors are suitable for

AC voltage and freewheeling diodes for DC voltage loads. The suppressing elements must

be connected as close to the coil as possible.

4.2 Network Termination

Transmission line effects often present problems for data communication networks.

These problems include reflections and signal attenuation. To eliminate the presence of

reflections of signal from the end of the cable, the cable must be terminated at both ends

with a resistor across the line adequate to its characteristic impedance. Both ends must

be terminated since the propagation is bidirectional. In 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 31. Addresses from 32 to 255

can be set via RS485 or USB.

Addr

SW1

SW2

SW3

SW4

SW5

OFF

Содержание SfAR-S-8TO

Страница 1: ...www ismacontrolli com DMP277en 3rd Issue rev 2 05 2022 SfAR S 8TO User Manual Expansion Module 8 Triac Outputs ...

Страница 2: ... Functions 9 4 4 Communication Settings 9 4 4 1 Default Settings 9 4 5 Restoring Default Configuration 9 4 6 Configuration Registers 10 4 7 Watchdog 10 5 Indicators 11 6 Connections 12 6 1 Block Diagram 12 6 2 Power Supply Connection 12 6 2 1 DC Power Connection 12 6 2 2 AC Power Connection 13 6 3 Communication Bus Connection 13 6 4 Connection of Triac Outputs 13 6 4 1 Connection of Electrovalve 1...

Страница 3: ... the product without incurring any liability for the purposes of commercial law This information does not discharge you from the liability of your own judgement and verification We reserve the right to change product specifications without notice Please read the instructions carefully and follow the recommendations concluded therein 1 1 Revision History Rev Date Description 3 2 25 May 2022 Rebrand...

Страница 4: ...enomena like surges and bursts to devices They also isolate products from inductive phenomena from other transformers and loads Power supply systems for the product should be protected by external devices limiting overvoltage and effects of lightning discharges Avoid powering the product and its controlled monitored devices especially high power and inductive loads from a single power source Power...

Страница 5: ...g on a DIN rail in accordance with DIN EN 5002 The module is equipped with a set of LEDs to indicate the status of inputs and outputs which is useful for diagnostic purposes and helping to find errors Module configuration is done via USB by using a dedicated computer program It also allows for changing the parameters using the Modbus protocol or set the Modbus address using the DIP switches under ...

Страница 6: ...S485 Up to 128 devices Table 2 Technical specification 3 3 Dimensions The appearance 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 are located on the front of the module Figure 1 Dimensions ...

Страница 7: ...termediate terminals the shielding should be earthed directly after the cable enters the cabinet It is recommended to install interference suppressors when switching inductive loads e g coils of contactors relays solenoid valves RC snubbers or varistors are suitable for AC voltage and freewheeling diodes for DC voltage loads The suppressing elements must be connected as close to the coil as possib...

Страница 8: ... OFF ON OFF ON OFF 11 ON ON OFF ON OFF 12 OFF OFF ON ON OFF 13 ON OFF ON ON OFF 14 OFF ON ON ON OFF 15 ON ON ON ON OFF 16 OFF OFF OFF OFF ON 17 ON OFF OFF OFF ON 18 OFF ON OFF OFF ON 19 ON ON OFF OFF ON 20 OFF OFF ON OFF ON 21 ON OFF ON OFF ON 22 OFF ON ON OFF ON 23 ON ON ON OFF ON 24 OFF OFF OFF ON ON 25 ON OFF OFF ON ON 26 OFF ON OFF ON ON 27 ON ON OFF ON ON 28 OFF OFF ON ON ON 29 ON OFF ON ON O...

Страница 9: ...it Read 2 3 30001 Input Registers Registered Read 3 4 40001 Output Registers Registered Read write 4 6 16 Table 4 Types of Modbus functions supported by the module 4 4 Communication Settings The data stored in the module s memory is given in the 16 bit registers The access to registers is via Modbus RTU or Modbus ASCII 4 4 1 Default Settings The default configuration can be restored with the DIP s...

Страница 10: ...even 3 always 0 4 always 1 40004 3 0x03 Stop Bits 1 one stop bit 2 two stop bits 40004 3 0x03 Data Bits 7 7 data bits 8 8 data bits 40006 5 0x05 Response Delay Time in ms 40007 6 0x06 Modbus Mode 0 RTU 1 ASCII Table 6 Configuration registers 4 7 Watchdog This 16 bit register specifies the time in milliseconds to watchdog reset If module does not receive any valid message within that time all digit...

Страница 11: ...cators Figure 2 Indicators Indicator Description Power Supply The 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 The LED indicates that the output is on Table 7 Description of indicators ...

Страница 12: ...r Manual www ismacontrolli com DMP277en 3rd Issue rev 2 05 2022 page 12 of 20 6 Connections 6 1 Block Diagram Figure 3 Block diagram 6 2 Power Supply Connection 6 2 1 DC Power Connection Figure 4 DC power connection ...

Страница 13: ...Issue rev 2 05 2022 page 13 of 20 6 2 2 AC Power Connection Figure 5 AC power connection 6 3 Communication Bus Connection Figure 6 Communication bus connection 6 4 Connection of Triac Outputs 6 4 1 Connection of Electrovalve Figure 7 Connection of electrovalve ...

Страница 14: ...uickly connecting a group of devices with a flat ribbon cable Thanks to this solution it is enough to connect power an RS485 communication to one of the devices in the group and the others will be powered and communicated with ribbon cable The Quick Connector is sufficient to connect up to 10 devices next to each other It is important that the various types of modules in the SfAR S family can be c...

Страница 15: ...of 20 7 DIP Switch Figure 10 DIP switch Switch Function Description 1 Module address 1 Setting module address from 0 to 31 2 Module address 2 3 Module address 4 4 Module address 8 5 Module address 16 6 Restoring default settings Restoring default settings Table 8 Description of switches ...

Страница 16: ... ASCII or RTU 40009 8 0x08 Watchdog Read write Watchdog 40013 12 0x0C Default Outputs State Read write Default outputs state 40019 18 0x12 PWM Output Read write PWM output state 40020 19 0x13 Default Duty Cycle Output 1 Read write Value default duty cycle output 1 From 0 to 100 20021 20 0x14 Default Duty Cycle Output 2 Read write Value default duty cycle output 2 From 0 to 100 20022 21 0x15 Defaul...

Страница 17: ... of received packets with error 40036 35 0x23 Incorrect Packets MSR Read write 40037 36 0x24 Sent Packets LSR Read write No of sent packets 40038 37 0x25 Sent Packets MSR Read write 40052 51 0x33 Outputs Read write Outputs state 40133 132 0x84 Period PWM Output 1 Read write Range adjustment period 0 65535 s 40134 133 0x85 Period PWM Output 2 Read write Range adjustment period 0 65535 s 40135 134 0...

Страница 18: ...e Output 4 Read write Value duty cycle output 4 From 0 to 100 40145 144 0x90 Duty Cycle Output 5 Read write Value duty cycle output 5 From 0 to 100 40146 145 0x91 Duty Cycle Output 6 Read write Value duty cycle output 6 From 0 to 100 40147 146 0x92 Duty Cycle Output 7 Read write Value duty cycle output 7 From 0 to 100 40148 147 0x93 Duty Cycle Output 8 Read write Value duty cycle output 8 From 0 t...

Страница 19: ...tput 6 state 199 198 0x0C6 Default Output 7 State Read write Default output 7 state 200 199 0x0C7 Default Output 8 State Read write Default output 8 state 817 816 0x330 Output 1 Read write Output 1 state 818 817 0x331 Output 2 Read write Output 2 state 819 818 0x332 Output 3 Read write Output 3 state 820 819 0x333 Output 4 Read write Output 4 state 821 820 0x334 Output 5 Read write Output 5 state ...

Страница 20: ... network as well as to read and write the current value of other registers of the module It is a convenient way to test the system as well as to observe real time changes in the registers Communication with the module is via the USB cable The module does not require any drivers Figure 11 PC connection The SfAR Configurator is a universal software where it is possible to configure all available mod...

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