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Rev 20.11.2019 

V1.07 - Page 12 

Subject to modifications! 

romutec Steuer.-und Regelsysteme GmbH   Jochsberger Straße 39    D-91592 Buch am Wald 

www.romutec.de 

Subject to technical changes 

 

 
 

 
 

Overview terminal assignment: 

 
 
 

romod 8 DO eco 

 

 

 

 

 

 

 

 

 

 

 

 

DOs with ground referenced 
semiconductor o24 V DC! 

 

G

ND

 

2

4

AC/

DC

 

+2

4

V

 DC

  

fo

D

O

s

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DO No. 1-8 

 

 

 

 

 

 

 

 

 

 

 

 

 

Terminal: 

 

 

 

 

 

11 

 

12 

 

13 

 

14 

 

15 

 

16 

 

17 

 

18 

 

+24VDC for DOs 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Terminal: 

 

 

10  19 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power supply 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Terminal: 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 
 
The two supply terminals (10 + 19) for the DOs are connected with each other internally. 
 
 
 

Bus connection 

Terminal No.

 

I-GND 

 

 

 

Net A (

–) aka /D 

 

 

 

Net B (+) aka D 

 

 

 

 
 
 
 

 

Summary of Contents for romod

Page 1: ...digital and analog inputs and outputs for use in building automation and control systems with Modbus RTU interface for DIN rail mounting romutec Steuer u Regelsysteme GmbH Jochsberger Straße 39 D 91592 Buch am Wald Phone 49 0 98 67 97 90 0 Fax 49 0 98 67 97 90 90 E Mail info romutec de ...

Page 2: ...ut module with MOSFET outputs 8 DO eco 11 5 3 Digital output module with relay outputs 8 DO R eco 13 5 4 Digital input output module with relay outputs 4 DIO R eco 15 5 5 Digital output module with relay outputs 4 DO R eco 17 5 6 Analog input module 8 AI eco 19 5 7 Analog output module 8 AO eco 21 Appendix 23 A Technical specifications 23 B Dimensions and weights 24 C Wiring diagrams 25 Fig C 1 ro...

Page 3: ... autobaud Applications systems of building automation e g heating ventilation air conditioning and refrigeration systems as well as in equipment for operational control Direct connection to the MODBus RTU interface as slave devices Connection via RS485 EIA485 The romod eco modules operate as slaves to all PLC or DDC systems that can provide MODBus RTU master functionality Programming is done via t...

Page 4: ...hould not be installed in the immediate vicinity of frequency converters Frequency converters must be provided with all safety measures in order to comply with the required regulations and guidelines e g line filter etc Do not use the product near water or other liquids which can damage the electronic components The supply voltage must correspond to the information in the technical data The termin...

Page 5: ...sion modules the following types are available Digital input modules 16 DI eco activation of the inputs conventionally wired via terminal and passing over the bus to the MODBus master device for further processing Digital output modules 8 DO eco with ground referenced semiconductor outputs 24 V DC activation of outputs by commands via MODBus Digital output modules 8 DO R eco with potential free re...

Page 6: ...e range of 0 254 Dip 1 most left represents the value 1 Dip 8 most right signifies the value 128 The following should be considered when setting the addresses There are not allowed any duplicate addresses Each address can be assigned only once per MODBus line The addresses can be selected arbitrarily in the range of 0 254 setting sequential addresses is not necessary Note When setting the address ...

Page 7: ...e wired whether with braided shield or individual strands and connected to ground earth potential There is no internal connection between I GND and the GND of the power supply Terminating the RS 485 interface acc EIA 485 is required Therefore the termination has to be enabled by means of the two pole dip switch on the last device which is connected to the bus The termination will be realized withi...

Page 8: ...es of sensors active and passive ones The sensor type is defined for each analog input using a configuration register Types of sensors connected to the analog inputs This has an effect on the displayed analog values as the sensor characteristics are implemented in the module Selection Automatic baud rate detection or manually setting the baud rate It can be selected whether the automatic baud rate...

Page 9: ...tely The digital inputs can be used as counters but only for DC signals For each input a prescaler may be adjusted in order to count e g just every second or third pulse A subsequent change of the prescaler also results in a retroactive amendment of the corresponding counter values The pulse duration must be at least 10 ms to be reliably detected For AC control of the inputs the edge detection has...

Page 10: ...r activation of digital inputs use 24V AC DC GND 24V AC DC COM for DIs DI No 1 8 1 2 3 4 5 6 7 8 Terminal 11 12 13 14 15 16 17 18 DI No 9 16 9 10 11 12 13 14 15 16 Terminal 19 20 21 22 23 24 25 26 COM für DIs Terminal 10 27 Power supply Terminal 1 2 Sink and source operation mode is possible with the inputs The two COM terminals of the DIs are bridged internally Bus connection Terminal No I GND 3 ...

Page 11: ...legrams via the MODBus for a certain time These predefined states are set separately for each output whereas the time until activating the safe state is common for all outputs of a module Note The time for triggering the safe state should not be too short in order to avoid malfunctions as they can occur e g when another device which is connected to the bus fails and will so cause time outs Regardi...

Page 12: ...iew terminal assignment romod 8 DO eco DOs with ground referenced semiconductor outputs 24 V DC GND 24V AC DC 24V DC for DOs DO No 1 8 1 2 3 4 5 6 7 8 Terminal 11 12 13 14 15 16 17 18 24VDC for DOs Terminal 10 19 Power supply Terminal 1 2 The two supply terminals 10 19 for the DOs are connected with each other internally Bus connection Terminal No I GND 3 Net A aka D 4 Net B aka D 5 ...

Page 13: ...MODBus for a certain time These predefined states are set separately for each output whereas the time until activating the safe state is common for all outputs of a module Note The time for triggering the safe state should not be too short in order to avoid malfunctions as they can occur e g when another device which is connected to the bus fails and will so cause time outs Regarding the system co...

Page 14: ...oltages of DOs are potential free two groups GND 24V AC DC COM DO 1 4 COM DO 5 8 DO No 1 8 1 2 3 4 5 6 7 8 Terminal 11 12 13 14 15 16 17 18 COM for DOs Terminal 10 19 Power supply Terminal 1 2 The two COM supply terminals 10 19 for the DOs are NOT connected with each other internally Important The signals to be switched must have the same phasing Bus connection Terminal No I GND 3 Net A aka D 4 Ne...

Page 15: ...oreover on and off delays can be set for each output as well as minimum times for the states ON and OFF Mutual interlocking of outputs is also possible All digital outputs can be configured so that they will assume a defined state safe state if the module has not received valid bus telegrams via the MODBus for a certain time These predefined states are set separately for each output whereas the ti...

Page 16: ... reset to zero automatically If a DI s status has altered several times e g from 0 to 1 and back to 0 a change will be signalized anyway Regarding the system configuration addressing max number of modules connected to a MODBus Master installation connection to the bus etc please follow the instructions in the chapter Configuration Important technical data Power supply 24 V AC or DC connection via ...

Page 17: ...ld not be too short in order to avoid malfunctions as they can occur e g when another device which is connected to the bus fails and will so cause time outs Furthermore a delay time can be defined which must elapse between the switching of two outputs at least Thus the system perturbations resulting from the switching operations can be reduced Regarding the system configuration addressing maximum ...

Page 18: ...h am Wald www romutec de Subject to technical changes Overview terminal assignment romod 4 DO R eco Output voltages of DOs are potential free GND 24V AC DC not used not used DO No 1 4 Terminal 10 11 12 13 14 15 16 17 Power supply Terminal 1 2 Bus connection Terminal No I GND 3 Net A aka D 4 Net B aka D 5 DO 4 DO 2 DO 3 DO 1 ...

Page 19: ...e sensor types e g Pt1000 Ni1000 may be connected to the module Unused inputs should be configured for 0 10V signals and connected to GND potential Regarding the system configuration addressing maximum number of modules connected to a MODBus Master interface installation connection to the bus etc please follow the instructions in the chapter Configuration Supported types of sensors Type of sensor ...

Page 20: ... or DC connection via terminals Current consumption max 40 mA DC 80 mA AC Resolution AI 10 Bit Impedance 20 MΩ Overview terminal assignment romod 8 AI eco AIs for active sensors 0 10 V and various types of RTD sensors GND 24V AC DC GND for AIs AI No 1 8 1 2 3 4 5 6 7 8 Terminal 10 12 13 15 16 18 19 21 GND for AIs Terminal 11 14 17 20 Power supply Terminal 1 2 Bus connection Terminal No I GND 3 Net...

Page 21: ...configured so that they will assume a defined state safe state if the module has not received valid bus telegrams via the MODBus for a certain time These predefined states are set separately for each output whereas the time until activating the safe state is common for all outputs of a module Note The time for triggering the safe state should not be too short in order to avoid malfunctions as they...

Page 22: ... Wald www romutec de Subject to technical changes Overview terminal assignment romod 8 AO eco Output voltage AOs 0 10 V DC GND 24V AC DC GND for AOs AO No 1 8 1 2 3 4 5 6 7 8 Terminal 10 12 13 15 16 18 19 21 GND for AOs Terminal 11 14 17 20 Power supply Terminal 1 2 Bus connection Terminal No I GND 3 Net A aka D 4 Net B aka D 5 ...

Page 23: ... 4 DIO R eco max 1 7 W DC 3 7 W AC with all outputs activated 4 DO R eco max 0 4 W DC 1 0 W AC 8 AI eco max 1 0 W DC 1 9 W AC 8 AO eco max 1 8 W DC 3 9 W AC with all analog outputs loaded Counting puls only digital inputs duration min 10 ms only for DC signals Max counter value digital inputs 65 535 2 16 1 Bus interface RS485 Supported baud rates 9 600 Baud 19 200 Baud Autobauding 38 400 Baud 57 6...

Page 24: ... to technical changes D H B Dimensions and weights The dimensions of the modules can be seen from the following figures and the table below Type H W D Weight 16 DI eco 92 72 70 125 8 DO eco 92 72 70 127 8 DO R eco 92 72 70 146 4 DIO R eco 92 72 70 137 4 DO R eco 92 72 70 146 8 AI eco 92 72 70 133 8 AO eco 92 72 70 128 All dimensions in mm weight in grams W ...

Page 25: ... 2019 V1 07 Page 25 Subject to modifications romutec Steuer und Regelsysteme GmbH Jochsberger Straße 39 D 91592 Buch am Wald www romutec de Subject to technical changes C Wiring diagrams Fig C 1 romod 16 DI eco ...

Page 26: ...Rev 20 11 2019 V1 07 Page 26 Subject to modifications romutec Steuer und Regelsysteme GmbH Jochsberger Straße 39 D 91592 Buch am Wald www romutec de Subject to technical changes Fig C 2 romod 8 DO eco ...

Page 27: ...ject to modifications romutec Steuer und Regelsysteme GmbH Jochsberger Straße 39 D 91592 Buch am Wald www romutec de Subject to technical changes Fig C 3 romod 8 DO R eco Important The signals to be switched must have the same phasing ...

Page 28: ...ect to modifications romutec Steuer und Regelsysteme GmbH Jochsberger Straße 39 D 91592 Buch am Wald www romutec de Subject to technical changes Fig C 4 romod 4 DIO R eco Important The signals to be switched must have the same phasing ...

Page 29: ...Rev 20 11 2019 V1 07 Page 29 Subject to modifications romutec Steuer und Regelsysteme GmbH Jochsberger Straße 39 D 91592 Buch am Wald www romutec de Subject to technical changes Fig C 5 romod 4 DO R eco ...

Page 30: ...Rev 20 11 2019 V1 07 Page 30 Subject to modifications romutec Steuer und Regelsysteme GmbH Jochsberger Straße 39 D 91592 Buch am Wald www romutec de Subject to technical changes Fig C 6 romod 8 AI eco ...

Page 31: ...Rev 20 11 2019 V1 07 Page 31 Subject to modifications romutec Steuer und Regelsysteme GmbH Jochsberger Straße 39 D 91592 Buch am Wald www romutec de Subject to technical changes Fig C 7 romod 8 AO eco ...

Page 32: ... Description 16 DI eco 16 DI rail mounted module 8 DO eco 8 DO rail mounted module semiconductor outputs 24 Volts 8 DO R eco 8 DO rail mounted module relay outputs NO 4 DIO R eco 4 DI DO rail mounted module relay outputs NO 4 DO R eco 4 DO rail mounted module 4x relay outputs NO bistable relays 8 AI eco 8 AI rail mounted module inputs active 0 10 V and passive RTD configurable 8 AO eco 8 AO rail m...

Page 33: ...th DI1 followed by the other ones up to DI16 1 00 01 DI 1 2 00 02 DI 2 3 00 04 DI 3 4 00 08 DI 4 5 00 10 DI 5 6 00 20 DI 6 7 00 40 DI 7 8 00 80 DI 8 9 01 00 DI 9 10 02 00 DI 10 11 04 00 DI 11 12 08 00 DI 12 13 10 00 DI 13 14 20 00 DI 14 15 40 00 DI 15 16 80 00 DI 16 R1100 Value Hex Inverting Digital Inputs DI No DI16 DI1 Using this register the 16 digital inputs can be inverted individually Each D...

Page 34: ...r DI 16 R10116 R10051 Register Counter values 32 Bits of the digital inputs Each two registers contain the 32 bit counter value of a DI raw value prescaler has no influence Important Counters are only suitable for DC signals A maximum of 8 values i e 16 registers may be read with one command R10082 R10051 R10052 Counter value DI 1 R10081 R10082 Counter value DI 16 R1101 Value Hex Delay of the edge...

Page 35: ... R2135 Value Hex Setting the mask for Safe State of the DOs DO No DO8 DO1 If it is required that the DOs will have a defined state when the bus fails the corresponding bits of this register must be set to 1 Each DO is assigned to a bit of the register The assignment corresponds to that of the register R121 Controlling the DOs via bus command The settings of this register are stored in non volatile...

Page 36: ...lue Hex Toggling the DOs via bus command DO No DO4 DO1 Each DO is assigned to a bit of the register The assignment corresponds to that of the register R121 The respective DO must not be configured as permanently tracking the status of a DI in the registers R2001 R2004 bits 9 12 otherwise control via bus is not possible 1 00 01 Toggling of DO1 4 00 08 Toggling of DO4 R115 Value Hex Mask for complet...

Page 37: ...e state as DI4 R3501 Value Hex Mask for interlocking DO 1 against other DOs Bit No If DO1 has to be interlocked against other DOs the corresponding bits must be set in this register DOs configured here will take priority over DO1 A cross over interlock has to be avoided If in contrast all bits are set to 0 the states of the other DOs do not affect this DO 00 00 Other DOs will not affect DO 1 1 00 ...

Page 38: ...oncerning DO 1 R 3204 Switch on delay concerning DO 4 R3211 Register Switch off delay for digital outputs Each register contains the value of the switching off delay of a digital output in milliseconds R3214 R 3211 Switch off delay concerning DO 1 R 3214 Switch off delay concerning DO 4 R3101 Register Minimum time for state off before switching on a digital output again Each register contains the ...

Page 39: ...ition is that the corresponding bits in register R 2135 are set to 1 Each digital output is assigned to a bit of the register The settings of this register are stored in non volatile memory 00 00 All DOs will be switched OFF if safe state is triggered 1 00 01 DO 1 will be switched ON when safe state is triggered 4 00 08 DO 4 will be switched ON when safe state is triggered Digital Inputs R101 Valu...

Page 40: ...R10101 R 10204 Prescaler of counter DI 4 R10104 R10051 Register Counter values 32 Bits of the digital inputs Each two registers contain the 32 bit counter value of a DI raw value prescaler has no influence Important Counters are only suitable for DC signals R10058 R10051 R10052 Counter value DI 1 R10057 R10058 Counter value DI 4 R1101 Value Hex Delay of the edge detection DI Nr DI4 DI1 This regist...

Page 41: ... a second 10 Delay time 100 ms R121 Value Hex Controlling the DOs via bus command DO No DO4 DO1 Each DO is assigned to a bit of the register 1 00 01 Activating DO 1 4 00 08 Activating DO 4 R111 Value Hex Current state of the DO DO No DO4 DO1 This register shows the current status of each DO Each DO is assigned to a bit of the register The assignment corresponds to that of the register R121 Control...

Page 42: ...outputs in case of a failure of the MODBus The prior condition is that the corresponding bits in register R 2135 are set to 1 Each digital output is assigned to a bit of the register The assignment corresponds to that of the register R121 Controlling the DOs via bus command The settings of this register are stored in non volatile memory 00 00 All DOs will be switched OFF if safe state is triggered...

Page 43: ...alue Hex Flag indicating a change at analog inputs Input No AI8 AI1 The bits of this register are set when the value of an analog input has changed by more than the value of the delta determined in registers R1591 R1598 When the register has been read all bits are automatically reset to zero Each analog input is assigned to a bit of the register The least significant bit is associated with analog ...

Page 44: ...ch is connected to an analog input e g 0 10V or Pt1000 R1508 R 1501 Type of sensor AI 1 R 1508 Type of sensor AI 8 Valid values Units of measured values 0 0 10 V mV 1000 1 V 2 Resistance 0 5 k 10 1000 100 0 3 Resistance 0 15 k 1000 1000 4 in preparation 5 Pt 100 C 10 1000 100 0 C 6 Pt 1000 C 10 1000 100 0 C 7 Ni 1000 C 10 1000 100 0 C 8 Ni 1000 L G C 10 1000 100 0 C 9 KTY81 110 C 10 1000 100 0 C 1...

Page 45: ...tual value of an analog output R518 R 511 Actual value of AO 1 R 518 Actual value of AO 8 R2535 Value Hex Setting the mask for Safe State of the AOs AO No AO8 AO1 If it is required that the AOs will have a defined value when the bus fails the corresponding bits of this register must be set to 1 Each AO is assigned to a bit of the register The settings of this register are stored in non volatile me...

Page 46: ...sed 1 57 600 Baud 2 38 400 Baud 3 19 200 Baud 4 9 600 Baud R 3 Value Dec Automatic baud rate detection The setting in this register determines whether autobauding should be enabled or whether the module operates at a fixed baud rate which is configured in register R 2 Note For continuous operation in the plant the autobaud function should be disabled Instead the modules should be operated with a f...

Page 47: ...adjusted address of the module can be read via the bus R 10 Value Dec Reading the type of module This register contains the type of module in a coded form The values have the following meaning 15116 romod 16 DI eco 15008 romod 8 DO eco 15508 romod 8 DO R eco 15504 romod 4 DIO R eco 15404 romod 4 DO R eco 15308 romod 8 AI eco 15208 romod 8 AO eco R 12 Value Dec Reading the firmware version Using th...

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