Relay card FSP AS400 Black Green RS-232 24V 1A

The FSP AS400 relay card provides dry-contact outputs for remote monitoring and control of UPS systems. It includes a RS-232 communication interface and is designed to operate with a 24 V input and up to 1 A current. The compact black-and-green module is intended for integration into UPS equipment where simple relay signaling is required.

Advantages

The AS400 relay card supports selectable dry-contact logic (active close or active open) via jumper configuration, allowing it to adapt to different monitoring systems. Its RS-232 interface offers a straightforward communication channel for legacy and industrial control systems. The card's 24 V operating voltage and 1 A current rating provide compatibility with common UPS control circuits.

Suitable for

• Remote status monitoring of UPS systems
• Integration with building management or control panels using RS-232
• Applications requiring simple relay contact signaling (alarm, fault, run indicators)

When it may not be suitable

The AS400 relay card is intended for basic dry-contact signaling and may not be suitable where complex digital communication protocols or high-speed data transfer are required. It is not designed to carry high currents beyond its 1 A rating or to replace multifunction communication cards with advanced network interfaces.

Key specifications

• Communication interface: RS-232
• Operating voltage: 24 V
• Maximum current rating: 1 A
• Output type: Dry-contact relay (selectable active-close or active-open via jumper)
• Colour: Black and green

How to use

Install the AS400 relay card into the designated UPS expansion slot or mount it following the UPS manufacturer’s instructions. Connect RS-232 cabling to the host monitoring device and wire the dry-contact outputs to the external alarm or control circuits. Set the jumper to select the desired dry-contact polarity (active close or active open) according to the receiving system's requirements. Verify connections and test signal changes by simulating UPS events.

What to consider before purchase

• Ensure the UPS has a compatible expansion slot or connector for the relay card
• Confirm that 24 V and 1 A ratings match the target control circuits
• Check that the host monitoring equipment accepts RS-232 input and dry-contact signals

Recommendations

Use shielded RS-232 cabling for reliable communication in electrically noisy environments, and follow the UPS manufacturer’s installation guidelines when configuring jumpers and wiring to ensure correct relay logic and safe operation.