SGFS‑PM RSD is a PV rapid shutdown device that meets UL1741, UL3741 and NEC690.12 standards. It supports 24V control or PLC SunSpec communication, provides over‑temperature protection at 85°C, uses IP67 waterproof UV‑resistant flame‑retardant material, and quickly shuts down PV modules for firefighter and maintenance safety.
The rapid shutdown device is designed to meet the fire safety requirements of PV systems, quickly shut off PV modules in emergency situations, reduce the risk of electric shock, and solve the rescue and maintenance risks in PV systems.
CHARACTERISTIC：
▶ 24Vdc Control. Accurate detection of 85℃ over temperature protection.
▶ PLC Control. Complies with SunSpecTM PLC communication protocol.
▶ Adopting redundant design technology, the reliability of the rapid shutdown device is higher.
▶ Fire retardant V-0/UV resistant material.
▶ The product is resistant to high temperature, corrosion, impact, and is safe and reliable.
▶ The product is used in various photovoltaic systems for household, industrial and commercial purposes.
▶ Meet the requirements of UL1741, UL3741, NEC690.12, IEC standards.
PARAMETER：
Appearance
Model
SYFS-PMS1
SYFS-PMS2
SYFS-PMP1
SYFS-PMP2
Number of PV Inputs
1
2
1
2
Maximum allowable input voltage(V)
80V / 120V
80V
Maximum Allowed Input Current(A)
20A / 25A / 30A
Maximum Output Voltage(V)
80V / 120V
160V / 240V
80V / 120V
160V / 240V
System Voltage(V)
1000V / 1500V
Control Compliance
24V DC Power Cord
PLC (Sunspec)
Operating ambient temperature
-40℃ ~ +85℃
Maximum allowable current of bypass diode
20A / 25A / 30A
IP Level
IP67
PV Connectors
MC4
Size
135x78x21mm
110x70x19mm
Cable Length (input)
160mm
160mm / 1200mm
160mm
160mm / 1200mm
Cable Length (output)
1200mm
1200mm
Standard
NEC690.12-2017; Ul1741; IEC/EN62109; IEC/EN61000
CONTROLLER PARAMETERS：
Appearance
Model
SYFS-PMSC-80 24V DC controller (without lock)
SYFS-PMSC-80K 24V DC controller (with lock)
SYFS-PMPC-80 PLC controller (single magnetic ring without lock)
SYFS-PMPC-80K PLC controller (single magnetic ring with lock)
SYFS-PMPC-160 PLC controller (dual magnetic ring without lock)
SYFS-PMPC-160K PLC controller (dual magnetic ring with lock)
Rated input voltage range(A)
Single-phase 100~240VAC
Rated Frequency(Hz)
50/60Hz
Output Voltage (V)
24V DC
/
Output Current(A)
Assembly
1~ 2 String formation
Assembly
1~ 2 String formation
/
2.2A
(1~2)x2.2A
2.2A
(1~2)x2.2A
Output Signal
24V Shutdown
Complies with SunSpecTM PLC communication protocol
Maximum number of controllable rapid shutdown
1 for 1
1 for 2
1 for 1
1 for 2
1 for 1
1 for 2
1 for 1
1 for 2
100
80
100
80
100
80
100
80
Control Function
Power on the AC power supply, and the rapid shutdown device will conduct; Press the emergency button or disconnect the AC power supply, or if the ambient temperature exceeds 85℃, the quick shutdown device will quickly shut off.
Protection Level
IP65
Ambient Operating Temperature
-20℃~+70℃
External Dimensions (mm)
155×185×107mm
Company Introduction
Zhejiang Singi Electrical LLC
SINGI is a professional manufacturer of PV safety and protection devices, including RSD rapid shutdown, DC SPD, DC MCB, MCCB, and energy storage electrical components. Our products comply with UL, IEC, EN, NEC, and GB standards, with strict certification and quality control. SINGI provides reliable, certified safety solutions for global photovoltaic, energy storage, and new energy projects.
RFQ
Q: Why is a dedicated RSD mandatory for PV systems under NEC690.12 and UL standards?A: Without RSD, PV panels and cables remain energized even when the inverter is off, creating lethal electric shock risks for firefighters. SGFS‑PM RSD rapidly reduces voltage to safe levels, complying with fire codes and protecting first responders.
Q: What is the difference between 24V DC control and PLC SunSpec control in this RSD system?A: 24V control uses a dedicated wire for simple, stable shutdown. PLC SunSpec uses existing PV cables for communication, eliminating extra wiring and lowering installation cost while meeting advanced smart PV requirements.
Q: Why is 85°C over‑temperature protection critical for RSD safety?A: If a fire or abnormal heating occurs, the RSD automatically shuts down the PV module circuit before the fire spreads. This acts as a passive safety layer even if the manual shutdown system fails.
Q: How does IP67 protection make this RSD suitable for outdoor PV environments?A: IP67 means the device is fully dustproof and can withstand temporary immersion in water. It operates reliably in rain, snow, humidity, and outdoor exposure, ensuring long‑term stability in rooftop and ground‑mount PV systems.
Q: What is the benefit of “redundant design” in the SGFS‑PM RSD?A: Redundant design means dual internal detection and control circuits. If one circuit fails, the backup path ensures the RSD still functions, eliminating single points of failure and meeting strict safety certification requirements.
Q: Can this RSD be used in both 1000V and 1500V PV systems?A: Yes. The SGFS‑PM series supports both 1000V and 1500V system voltages, making it compatible with old and new PV plants, residential, commercial, and utility‑scale projects.
Singi Electrica is China manufacturer & supplier who mainly produces miniature circuit breaker, MCCB, SPD,distribution box , junction box with 24 years of experience. Hope to build business relationship with you.
