RO 051 S-DIAS Digital Relay Output Module SIGMATEK

SIGMATEK RO 051 Digital Relay Output Module (S-DIAS Digital Relay Output Module)

SIGMATEK RO 051 is a digital relay output module in the S-DIAS series for industrial automation control systems. It supports 4 relay outputs, used to operate electrical circuits or external devices through relay contacts.

The module supports use with DC and AC circuits as specified by ratings, allowing either NO (Normally Open) or NC (Normally Closed) contact types, enabling design of operation logic suitable for the characteristics of control circuits.

The catalog specifies contact ratings 24 VDC, 6 A or 230 VAC, 6 A and dimensions 25 x 104 x 72 mm (width x height x depth). However, load selection must be verified from the specific model's datasheet.

Features

• Brand: SIGMATEK
• Model: RO 051
• Series: S-DIAS
• Type: Digital Relay Output Module
• Supports 4 relay outputs
• Uses relay contacts for switching electrical circuits
• Supports use with DC and AC circuits as specified by ratings
• Contact types NO (Normally Open) or NC (Normally Closed)
• Ratings specified for DC circuit: 24 VDC, 6 A
• Ratings specified for AC circuit: 230 VAC, 6 A
• Dimensions 25 x 104 x 72 mm
• Suitable for machine control and automation systems
• A module in the SIGMATEK S-DIAS system

Technical Specifications

Specifications	Details
Brand	SIGMATEK
Model	RO 051
Series	S-DIAS
Product Type	Digital Relay Output Module
Number of Relay Outputs	4 Outputs
Output Type	Relay Output (DC/AC)
Contact Type	NO (Normally Open) / NC (Normally Closed)
DC Contact Rating	24 VDC, 6 A

AC Contact Rating 230 VAC, 6 A Width 25 mm Height 104 mm Depth 72 mm Dimensions (W x H x D) 25 x 104 x 72 mm Contact Rating by Load Type To Be Confirmed from Manufacturer Datasheet Simultaneous Load Limit Not Specified in Catalog Mechanical / Electrical Life Not Specified in Catalog Module Supply Requirements To Be Confirmed According to S-DIAS System Operating Temperature Not Specified in Catalog Catalog Reference SCMA General Catalog Vol.5, D1-06

Note: The catalog confirms the number of outputs, contact type, specified voltage and current ratings, and dimensions; however, it does not provide information on contact life, inductive load rating, or simultaneous output load limit.

4 Channel Relay Outputs (4 Relay Outputs)

SIGMATEK RO 051 supports 4 relay outputs for controlling the ON/OFF operation of connected devices using relay contacts as switching elements.

The application may be adapted to control status indicators, relay interfaces, or machine control circuits with appropriate electrical ratings; however, the type of load and contact capacity must be verified before connection.

NO (Normally Open) and NC (Normally Closed) Contacts

RO 051 supports NO (Normally Open) or NC (Normally Closed) contact types as per the catalog data.

NO (Normally Open) refers to contacts that are in an open state when the relay is inactive and close the circuit when the relay is activated.

NC (Normally Closed) refers to contacts that are in a closed state when the relay is inactive and open the circuit when the relay is activated.

Before wiring, check the Terminal Assignment and actual contact configuration of model RO 051 from the manufacturer's manual to confirm the selection of NO or NC for each channel.

Contact Ratings (Relay Contact Ratings)

Electrical Rating	Catalog Value
DC Rating	24 VDC, 6 A
AC Rating	230 VAC, 6 A

The ratings above are specified in the catalog for relay contacts. Before designing the actual circuit, check the load type and operating conditions from the Datasheet.

For inductive loads such as contactor coils, solenoids, or motors, consider the starting current, surge current, and back EMF protection circuits according to the load type.

The 6 A rating should not be interpreted as suitable for all types of loads or usable simultaneously across all channels without limitations.

AC and DC Load Control

Since RO 051 is a relay output module, it can be considered for opening or closing AC and DC circuits under the ratings specified by the manufacturer. This differs from transistor output modules with PNP or NPN switching characteristics.

For loads with high current or surge current risks, consider using contactors or external power devices as appropriate.

Compatibility with S-DIAS System

RO 051 is an expansion module in the S-DIAS family for relay output channels to support automatic control systems. Compatibility must be checked with CPU and system components from SIGMATEK.

The selection should check power supply, connection type, and engineering limitations from the manufacturer's manual before installation.

Physical Dimensions (Mechanical Dimensions)

Dimension	Size
Width	25 mm
Height	104 mm
Depth	72 mm

The design should allow space for terminal wiring, AC/DC circuit grouping, and the distance between power wires and signal wires as per system requirements.

Example Applications (Applications)

• Automatic machine control systems
• Circuit control through relay operation
• Status and warning device control system
• Contact NO or NC controlled devices
• Circuit-controlled coil contactor operation
• AC/DC load control according to specified ratings
• S-DIAS system relay output expansion
• Factory Automation and Machine Control

Comparison of RO 041 and RO 051

Specifications	RO 041	RO 051
Relay Outputs	4	4
Contact Type	NO	NO / NC
DC Rating	24 VDC, 6 A	24 VDC, 6 A
AC Rating	230 VAC, 6 A	230 VAC, 6 A
Dimensions	25 x 104 x 72 mm	25 x 104 x 72 mm

The key difference is that RO 051 supports NO or NC contacts, whereas the catalog specifies only NO contacts for RO 041. Therefore, choose the model based on your control circuit requirements.

Guidelines for Selecting SIGMATEK RO 051

• Check the number of relay outputs required
• Determine whether you need NO or NC contacts
• Verify load voltage and current ratings
• Check contact ratings according to load type from the datasheet
• Consider inrush currents and reactive loads
• Check the number of channels that must operate simultaneously
• Ensure compatibility with CPU and S-DIAS system
• Verify installation space and wiring layout

Installation Precautions

• Avoid using voltages and currents exceeding contact ratings
• Check NO, NC, and COM terminal numbers from the manual before wiring
• Separate AC and DC circuits as per safety requirements
• Select appropriate protective devices for connected loads
• Consider reverse voltage protection circuitry for reactive loads
• Avoid using general-purpose relay modules instead of dedicated safety systems requiring specific certification
• Disconnect power supply and verify no residual voltage before maintenance
• Test all contact and relay operations before actual use

Important Notes (Important Notes)

• The product is the SIGMATEK S-DIAS Digital Relay Output Module model RO 051
• Supports 4 relay output channels
• Suitable for NO or NC contact types
• Rated at 24 VDC, 6 A or 230 VAC, 6 A
• Dimensions: 25 x 104 x 72 mm
• Different from RO 041 which only specifies NO contacts in the catalog
• Must verify ratings according to load type and operational limitations simultaneously
• Must check terminal configuration and compatibility with S-DIAS system before ordering