ABB - Electrification AF-RA4 - Remove the coil terminal block from the contactor and clip the interface relay without any screwing operation.
ABB - Electrification

AF-RA4

Contact for Pricing

Overview

ABB RA4 Interface Relay (SKU: AF-RA4). Electromechanical relay for integrating 24 V DC PLC signals with ABB AF09-AF96 contactors and NF contactor relays. Amplifies low-voltage signals to energize contactor coils. Features one Normally Open (N.O.) contact. Coil controlled by PLC output, powered via A0/A2 terminals. Integrated surge protection utilizes compatible AF contactor/NF relay built-in suppression. Internal diode on E1/E2 terminals prevents damage from reverse polarity. Tool-free, clip-on mounting. Replaces contactor coil terminal block. Connection: E1+/E2– to PLC output (polarity sensitive). Two terminals link to contactor coil A1/A2. Specifications: - Control Voltage (Uc): 24 V DC - Compatibility: ABB AF09-AF96 contactors, NF contactor relays - Contact: N.O. - Mounting: Tool-free clip-on - Surge Protection: Integrated - Reverse Polarity Protection: Internal diode (E1/E2) Note: LDC4 and CAT4 blocks incompatible. Manufactured in Germany.
  • Tool-free clip-on mounting for ABB AF09-AF96 contactors and NF relays
  • 24 V DC control circuit voltage (Uc) for PLC compatibility
  • Normally Open (N.O.) contact configuration for reliable switching
  • Integrated surge protection leverages contactor/relay built-in suppression
  • Internal diode for reverse polarity protection on input terminals

Specifications

Connection Type
Screw Terminal
Connection Type
Clip-on / Screw Terminal
Material
Polyester
Mounting Type
Tool-free Clipping
Mounting Type
Tool-free clip-on
Poles
1
Poles
1P
Poles
1 NO
Series
AF
Special Features
RA4 interface relay is designed to receive 24 V DC signals delivered by PLC’s or other sources with a low output power and to restore them with sufficient power to operate the coils of the relevant AF09 ... AF96 contactors or the NF contactor relays. RA4 interface relay is made up of a miniature electromechanical relay equipped with a N.O. contact and with a low consumption 24 V DC coil.The interface relay coil is controlled by the PLC while the N.O. contact ensures switching of the power contactor.Coil switching gives rise to overvoltages which have adverse effects on the electronic devices, insulators and, more generally, on component lifetime. The RA4 is protected from surge thanks to the built-in surge protection of AF09 ... AF96. Furthermore, the RA4 is protected against relay pole reversal by a diode inserted between the E1 and E2 input terminals.ConnectionThe "E1+" and "E2–" input terminals must be connected, according to their polarity, to the PLC-output.The RA4 is equipped with two terminal pads for connection to the A1 and A2 terminals of the contactor coil.This coil is supplied between the A0 and A2 terminals of the RA4.MountingRemove the coil terminal block from the contactor and clip the interface relay without any screwing operation.
Voltage Rating
24 V DC
Package Dimensions (L x W x H)
2.126 IN x 2.126 IN x 1.85 IN
Package Dimensions (L x W x H)
5.4 cm x 5.4 cm x 4.699 cm
Package Weight (Imperial)
0.100 L
Package Weight (Metric)
0.045 kg
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Frequently Asked Questions about ABB - Electrification

What industries and applications are Jokab Safety products used for?

Jokab Safety products are specifically designed for machine safety applications across multiple critical industrial sectors, including Food and Beverage, Packaging, and Material Handling industries. Their safety solutions cover a wide range of machine safeguarding needs, such as safety light guards, safety controllers, safety relays, safety edges, safety mats, and two-hand control devices that protect personnel and equipment in complex industrial automation environments.

What technical support does Jokab Safety offer?

Jokab Safety offers comprehensive technical support through multiple channels, including a dedicated technical support phone line at (888) 385-1221 (Option 1) and email support at [email protected]. For advanced technical assistance, customers can contact their specialized Jokab Tech Support at (519) 982-0976 or email [email protected]. Additionally, they provide product specialist support through Jeff Leslie, who can be reached at (519) 982-0976, offering in-depth application and technical guidance.

What are the main product lines offered by Jokab Safety?

Jokab Safety offers a comprehensive range of machine safety products including safety light guards (Orion), safety controllers (Pluto), safety relays (Sentry), safety edges, safety contact mats, safety locks (Gkey), and safety sensors with OSSD and DYNlink interfaces. Their product lines are specifically designed for industrial applications in food and beverage, packaging, and material handling industries, providing robust safety solutions for machine guarding and personnel protection.

What are the key features of Jokab Safety products?

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What certifications and standards do ABB - Electrification products comply with?

ABB - Electrification products comply with a comprehensive range of international certifications and standards, including UL (United States), CSA (Canada), CE (European Community), UKCA (United Kingdom), EAC (Russia), and C-Tick (Australia & New Zealand). Our products meet critical international standards such as IEC 60947 series for low-voltage switchgear, functional safety standards EN 61800-5-2 and ISO 13849-1, and marine classification standards from Bureau Veritas, DNV, and Lloyd's Register of Shipping.

What industries and applications are ABB - Electrification products used for?

ABB - Electrification products are engineered for critical applications across multiple industries, including Energy, Oil & Gas, Manufacturing, Power Generation, HVAC, Marine, Food & Beverage, Mining, Pulp & Paper, Water Treatment, and Automotive. Their solutions cover essential electrical infrastructure needs such as switchgear, power distribution systems, circuit protection, digital control technologies, and drive systems designed for high-reliability environments with a strong focus on sustainability, efficiency, and safety.

What technical support does ABB - Electrification offer?

ABB - Electrification offers comprehensive technical support through multiple channels, including a dedicated technical support hotline at 888-385-1221 (Option 1), available 7:00 a.m. - 5:00 p.m. CST, Monday-Friday. Their support services encompass 24/7/365 emergency services, on-site support, remote monitoring and diagnostics, installation and commissioning, equipment assessments, repair coordination, and multi-vendor technical assistance. Customers can also access resources like personnel safety training, disaster recovery support, and service agreements tailored to their specific electrification needs.

What are the main product lines offered by ABB - Electrification?

ABB - Electrification offers a comprehensive range of electrical distribution and protection products, including circuit monitoring systems, panelboards, switchgear, motor control centers, circuit breakers, softstarters, and power distribution solutions. Key product lines span low and medium voltage applications across utilities, commercial, industrial, healthcare, and manufacturing sectors, with specialized offerings like the ReliaGear® panelboards, SMISSLINE TP bus systems, and Ekip UP protection and metering relays.

What are the key features of ABB - Electrification products?

ABB - Electrification products feature advanced integrated design elements that enhance industrial performance and reliability. Key features include harmonics and EMC design, integrated DC choke, removable terminals for fast installation, USB ports for troubleshooting, and integrated Safe Torque Off (STO) functionality. The products deliver superior motor control capabilities, support both induction and permanent magnet motors, and offer robust operational features like side-by-side mounting without derating and operation at temperatures up to 45°C. Additionally, ABB's Electrification solutions emphasize digital innovation, with technologies like Novolink enabling predictive maintenance, enhanced analytics, and seamless system integration.

What communication protocols do ABB - Electrification products support?

ABB - Electrification products support a comprehensive range of industrial communication protocols, including Modbus RTU, PROFIBUS DP, PROFINET, EtherNet/IP, CANopen, DeviceNet, and IEC 61850. These protocols enable flexible connectivity across multiple industrial automation platforms, with support for various network topologies and high-speed data transmission up to 100 Mbps.