Auxiliary Relay Cards
When you have to switch large loads with open collector outputs or small relays, the auxiliary relay cards can be used. The relay card will isolate and ensure that the larger electrical currents do not directly interact with your delicate electronics. This not only protects your circuits from electrical noise, voltage spikes, and other harmful conditions but also enhances the reliability and longevity of your overall system.
Elsema relay cards use industrial grade relays which conforms to several safety standards, UL, C-UL and VDE.
Auxiliary Relay Cards
Elsema: Frequently Asked Questions
What is the primary purpose of an Elsema Auxiliary Relay Card?
The auxiliary relay cards are designed to switch large electrical loads using open collector outputs or small relays. They act as an isolation barrier, ensuring that high currents do not directly interact with delicate electronics, which protects the system from electrical noise and voltage spikes.
Which Elsema receivers are compatible with these relay cards?
These cards are designed to integrate seamlessly with several Elsema receivers, including the MCR91508SS, MCR91502P, PCR43302SS, and the FMR15108. The relay cards can also seamlessly integrate into any system that requires a voltage free contact.
What are the different models available in the relay card range?
Elsema offers three main configurations:
- Relay1-12: A single relay output operating at 11–14 Volts DC.
- Relay1-24: A single relay output operating at 21–28 Volts DC.
- Relay8-12: Eight relay outputs operating at 11–14 Volts DC.
What is the maximum switching capacity of these relay cards?
The single-relay models (Relay1-12 and Relay1-24) can switch loads up to 16 Amps. The multi-relay model (Relay8-12) can switch up to 8 Amps per relay output.
Can these cards provide a voltage-free contact?
Yes. These relay cards are particularly helpful for applications that require a voltage-free contact to trigger a system. By using the relay as an intermediary, you can provide a clean switching signal to a controller without passing voltage from the triggering device.
How do these cards improve the longevity of a control system?
By isolating sensitive control circuits from the heavy electrical loads they manage, the relay cards prevent damage from back-EMF, spikes, and noise. This reduces wear on the main control unit and enhances the overall reliability of the system.
Is the installation of the relay cards complex?
No. The relay cards are designed for simple installation and configuration. They connect effortlessly with existing systems, allowing for straightforward integration without the need for complex rewiring or expensive system upgrades.
What is the benefit of using the 8-relay card for system interfacing?
The 8-relay cards are ideal for complex interfacing where a system needs to provide multiple relay outputs simultaneously. This allows a single control unit to manage up to eight independent functions or devices, such as different zones in a security system or multiple access points.
How can the 1-relay output cards be used with intercom systems?
The 1-relay output cards are frequently used to isolate intercom system outputs when connecting to a gate controller. This setup ensures that the intercom’s signal is safely separated from the gate’s control circuitry, preventing electrical interference between the two systems. Most intercom systems provide a voltage output whereas gate controllers require a voltage free contact. The Relay1-12 or the Relay1-24 can be easily used as the interfacing device between the intercom and the automatic gate controller.
Why is isolation important when connecting an intercom to a gate controller?
Isolation protects both the intercom and the gate controller from potential damage caused by ground loops, voltage differences, or electrical surges.
