The Space Age SSU-MR-311/T is a single-position SPDT low-voltage control relay. It uses opto-isolated trip circuitry and ships with track-mounting hardware. As a result, it interconnects low-voltage circuits in fire, security, and building control systems. The design fully isolates the trip and host inputs.
Space Age SSU-MR-311/T relay features
The module contains a red LED. This LED lights when the coil is energized. Therefore, technicians verify operation without metering. In addition, opto-isolation prevents interference between the trip and host inputs.
Both inputs are polarized and diode-protected. As a result, accidental reversed-polarity wiring will not damage the relay. The inputs are also jumper-selectable for two ranges. Specifically, “LO” covers up to 18.4VDC and “HI” covers 18.5VDC and above.
Specifications
- Contact configuration: SPDT, dry Form “C”
- Contact rating: 10A @ 120VAC; 7A @ 24VDC/VAC (resistive)
- Trip input: 5 to 27.3VDC (polarized, opto-isolated)
- Host input: 12 to 27.3VDC (polarized)
- Range select: jumper LO (≤18.4VDC) / HI (≥18.5VDC)
- Energized indicator: one red LED
- Mounting: 3.5-inch plastic snap track with screws (included)
- Listings: UL Recognized Component; UUKL smoke control; MEA; CSFM
Applications
This relay matches trip signals to many load types. For example, it works with standard TTL, fire, and security voltages. Furthermore, the polarized inputs support supervision and multi-criteria logic.
For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com
Additional information
| Weight | 0.5 lbs |
|---|---|
| Dimensions | 5 × 2 × 2 in |
| Condition | New |
| Manufacturers | Securitron |
| Part Type | Replacement Part |
