Rittal 7030040 DK CMC III I/O Unit - 8 inputs, 4 relays
Part Number: 7030040
Quick Summary
Rittal DK CMC III I/O Unit monitors up to eight digital inputs and handles relay control for cabinet automation. Engineers often struggle with reliable signal management and wiring complexity in control panels. Typical certifications for industrial I/O modules include CE marking, IP-rated enclosures and SIL-ready interfaces to meet European and global safety standards. While the data does not specify the unit's exact certifications, its compact form factor, rugged enclosure, and CAN bus interface support reliable, scalable deployments in industrial settings. This solution offers easy integration with standard Rittal cabinets and supports plug-and-play deployment, driving faster commissioning and reduced wiring time while maintaining operational reliability across harsh environments.
Product Information
Extended Description
7030040 Rittal: DK CMC III I/O Unit, For signal receiving and passing on control commands, WHD: 138x40x132 mm, Monitoring: > 8 digital inputs, Control: > 4 Relais
Article number
DK 7030.040
Product description
In the software, the relays can be linked to measurement values so that they are actuated under certain circumstances. This allows devices to be controlled and messages to be forwarded. Cannot be operated with the Processing Unit Compact.
Benefits
Fast connection and automatic detection via plug & play
Function principle
Automatic sensor detection by the Processing Unit with consecutive numbering of the sensors
Material
Plastic | Front: Smooth | Enclosure: Textured
Colour
Enclosure: RAL 7035 | Front: RAL 9005
Supply includes
CMC III I/O Unit | Assembly parts for mounting on surfaces
Interface bus system
2 x RJ45 CAN bus
Interfaces
8 digital inputs
No. of participants per IoT interface (max.)
16
No. of participating PU (max.)
8
Note
Cannot be operated with the Processing Unit Compact
Dimensions
Width: 138 mm | Height: 40 mm | Depth: 132 mm
Operating temperature range
0 °C...55 °C
Ambient humidity (non-condensing)
5...95 %
Packs of
1 pc(s).
Weight/pack
0.62 kg
Customs tariff number
85311095
EAN
4028177659360
ETIM 9
EC002627
ECLASS 8.0
27189253
Product description
DK CMC III I/O Unit, For signal receiving and passing on control commands, WHD: 138x40x132 mm, Monitoring: > 8 digital inputs, Control: > 4 Relais
Feature → Business Impact → Application: Eight digital inputs enable direct monitoring of sensors and status lines, reducing external branching and wiring complexity while improving fault detection; the result is faster commissioning and lower maintenance in automated systems. Feature → Business Impact → Application: Four relays linked to measurement values allow conditional actuation, enabling proactive safety and process control in machine bays and cabinet interiors. Feature → Business Impact → Application: CAN bus interface with two RJ45 connectors supports robust, scalable networked I/O across distributed control architectures, ideal for modular automation in manufacturing lines. Feature → Business Impact → Application: Compact dimensions (W 138 mm x H 40 mm x D 132 mm) simplify cabinet integration and retrofit projects, saving space and enabling retrofits in tight electrical enclosures. Feature → Business Impact → Application: Wide operating range (0 °C to 55 °C) and non-condensing humidity tolerance (5–95 %) ensure reliable performance in harsh environments common in industrial plants. Feature → Business Impact → Application: Automatic sensor detection and sequential numbering reduce commissioning time and minimize wiring errors, especially in multi-sensor networks. Feature → Business Impact → Application: Not compatible with Processing Unit Compact, which clarifies integration boundaries and prevents misapplication in smaller control configurations.
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FAQs
Install the DK 7030.040 by mounting it on a flat surface inside the enclosure, connect the 2 x RJ45 CAN bus cables to the CAN network, and wire the 8 digital inputs and 4 relay outputs to your sensors and actuators. Note that this unit is not compatible with the Processing Unit Compact, so plan your control cabinet layout accordingly and verify clearances for heat dissipation.
The DK 7030.040 provides eight digital inputs for sensor monitoring and control of more than four relays. It features two RJ45 CAN bus interfaces for networked I/O, compacts within a 138 x 40 x 132 mm footprint, and operates from 0 to 55 °C with 5–95% non-condensing humidity, making it suitable for various industrial cabinet environments.
Yes. With eight inputs and four relays, the unit supports sensor monitoring and conditional actuation, enabling machine states to drive relay-based control. Its CAN bus networking allows distributed I/O across modular automation, helping you centralize monitoring while keeping wiring minimal and organized.
The data provided does not list specific certifications. For European and global applications, verify CE certification, IP protection on the enclosure, and SIL-related safety requirements with the supplier or Rittal documentation before deployment to ensure regulatory compliance for your installation.
By reducing wiring complexity, enabling plug-and-play integration, and accelerating sensor-to-relay control with automatic detection, this unit lowers commissioning time and maintenance costs. In retrofit scenarios, the compact form factor minimizes cabinet redesign, enabling faster upgrades and improved system reliability with scalable CAN bus I/O.