Vertiv IS-RELAY IntelliSlot Relay Contact Closure Card
Overview
The Vertiv IS-RELAY is a hot-installable IntelliSlot card for the Liebert PSI5 UPS line that delivers contact closure signals for remote monitoring of alarm conditions. If your facility management team needs to wire UPS alarm states into a building management system (BMS), a SCADA panel, or a third-party monitoring controller without relying on network protocols, the IS-RELAY provides that dry-contact signal path in a slot-in form factor. Because it is hot-installable, you can add it to a live PSI5 unit without scheduling a maintenance window — a practical advantage in environments where UPS downtime carries operational risk.
The IS-RELAY (often searched as IS RELAY) is part of the broader Vertiv IntelliSlot accessory ecosystem, which also includes the Vertiv IntelliSlot communications and sensor lineup covering SNMP communications cards and environmental sensors. Pairing the IS-RELAY with the IS-Unity-SNMP card in a dual-slot configuration lets you cover both relay-based hardwired monitoring and SNMP-based network management simultaneously, depending on your slot availability on the PSI5.
Key Features
- Contact Closure Output: Provides relay contact signals that hardwire directly into BMS panels, fire alarm interfaces, or SCADA systems — no network infrastructure required at the monitoring endpoint. Ideal for sites where IT and facilities teams each need independent alarm visibility.
- Hot-Installable Design: Slots into the PSI5 while the UPS remains online, eliminating the need for a scheduled outage to add remote monitoring capability after initial deployment.
- PSI5 UPS Compatibility: Engineered specifically for the Liebert PSI5 UPS family. Verify your PSI5 model's available IntelliSlot slots before ordering — the PSI5 chassis must have an open IntelliSlot bay.
- IntelliSlot Form Factor: Shares the same card architecture as other UPS communications and monitoring accessories in the IntelliSlot family, simplifying spare-parts management across a mixed Vertiv UPS fleet.
Integration and Compatibility
The IS-RELAY integrates into the PSI5 IntelliSlot bay and provides passive contact closure outputs for downstream monitoring equipment. It is designed to work alongside sensor probes such as the SN-2D (two-door switch monitor), SN-3C (three dry-contact input monitor), and SN-TH (temperature/humidity sensor) within the same Liebert monitoring ecosystem. For network-based UPS management, consider pairing with the IS-Unity-SNMP card if a second slot is available. Consult the PSI5 installation guide for maximum simultaneous card configurations and power protection planning before specifying both cards in the same chassis.
Frequently Asked Questions
Q: What UPS models is the IS-RELAY compatible with?
A: Based on available manufacturer documentation, the IS-RELAY is designed for the Liebert PSI5 UPS family. Verify slot availability on your specific PSI5 model before ordering.
Q: Can the IS-RELAY be installed while the UPS is running?
A: Yes — the IS-RELAY is hot-installable, meaning it can be added to a live PSI5 unit without powering down the UPS or scheduling a maintenance window.
Q: Does the IS-RELAY support SNMP or network management?
A: No. The IS-RELAY provides contact closure (relay) signals only. For SNMP-based network management, the IS-Unity-SNMP card is the appropriate IntelliSlot option.
Q: Can the IS-RELAY and IS-Unity-SNMP be installed in the same PSI5 simultaneously?
A: Potentially yes, if the PSI5 chassis has two available IntelliSlot bays. Confirm slot count with the PSI5 product documentation before combining cards.
Q: What types of systems can the IS-RELAY connect to?
A: The IS-RELAY provides contact closure outputs suitable for wiring into building management systems (BMS), SCADA panels, fire alarm interfaces, or any monitoring controller that accepts dry-contact inputs.
