Signal SPD
Electronic devices are always threatened by power surges and transients caused by power failures or nearby lightning strikes.
Signal SPDsurge protection device is born to protect electronic devices in automatic control systems.
The SPDsurge protection devicecan provide surge protection for field equipments such as sensors, transmitters, flow meters, solenoid valves, thermocouples, thermal resistance, devices with RS485 or RS232 interface and for I/O interfaces such as Al, AO, Dl, DO, Tl, Pl in PLC, DCS, FGS, ESD control systems.
Signal data surge protector is widely used in petrochemical, gas, environmental protection and new energy industries.
Chenzhu also provides signal arresterequipment in intrinsical safety circuits that meet the same design and structural standards as intrinsic safety equipment, which requires certification and approval of them.
Intrinsic Safety 5V Signal SPD
Intrinsic Safety 24V Signal SPD
Signal SPD For 5V
Signal SPD For 24V
FAQ of Signal SPD
How do I choose a signal SPD?-
CHENZHUSPD for signal is mounted by DIN rail. It can be selected from informations below.
According to the signal type, we can get the information of the signal voltage, so as to determine Uc.
For example, normally,
AI,AO: 24V,
DI,DO: 24V,
RS485, TC:5V,
RS232:12V
RTD:5V.
Since SPD for signal is normally installed in range, operating current will go through SPD. If operating current is bigger than IL of SPD, SPD will be damaged. Normally IL will be big enough. For 3-wire, 4-wire carrier current transmitters and DO signals which have higher power consumption, IL need to be checked.
Select 2 wires, 3 wires, 4 wires accordingly.
Yes——select intrinsically safe SPD;
No——select non intrinsic safety SPD.
How to judge if SPD is functional?-
SPD protected the devices by discharging current to the ground. One-time strike will not damage SPD unless SPD is chosen incorrectly.
Power supply SPD is equipped with disconnector. If SPD fails, it will indicate through the indication window. SPD disconnector will not trip when it discharges lightning current. It is used to avoid fire hazardous caused by continuous fault current flowing through SPD when SPD is degraded.
For signal SPD, the risk of fire is small, so it is not required to set a disconnector. Normally, special lightning protection testing devices need to be used for off-line tests. Nowadays, with the technology development, the status indication function of signal SPD is becoming popular, so it’s also possible to judge by status indication.
As a SPD supplier, we can offer kinds of related products for sale, if you have needs, please contact us.
在线联系供应商
Other supplier products
GS8500-EX Communication Input Intrinsic Safety Barrier | Communication signals input isolated barriers, realize the bi-direction communication between hazardous area and safe area. It also provides an iso... | |
DO Signal (SIS) Input 24V DC 5A Safety Relay | DO SISSignalInput 24V DC 5A Safety Relay These safety relay are suitable for the application of E-Stop button, safety gate and DO signal from SIS,... | |
Low Power SPD | The low profile surge protectoris designed to prevent transient surge conditions. T range surge arrester protection device for low voltage power su... | |
GS8500-EX Digital Intrinsic Safety Barrier | Digital input, relay output isolated barrier, transfers digital signals (dry contact or NAMUR proximity switch) from hazardous area to safe area. E... | |
Network SPD | SPDNetwork The network surge protection device, protects a data line, including computer network signals, communication devices, and so on. Plu... |
Same products
CSD16301Q2 TRANSISTOR MOSFET N-CH 25V 6SON TEXAS INSTRUMENTS | 卖方: ZK Electronic Technology Co., Limited | Part Number:CSD16301Q2 Description:CSD16301Q2 TRANSISTOR MOSFET N-CH 25V 6SON TEXAS INSTRUMENTS ... | |
CAPACITOR EEF-CX0J10CAPACITOR EEF-CX0J101R PANASONIC SMD SPEC POLYMER 100UF 6.3V SMD LF1R PANASONIC SMD SPEC POLYMER 100UF 6.3V SMD LF | 卖方: ZK Electronic Technology Co., Limited | Part name:EEF-CX0J101R Description:CAPACITOR EEF-CX0J101R PANASONIC SMD SPEC POLYMER 100UF 6.3V ... | |
Heavy Copper PCB Manufacturer | 卖方: Xinfeng Huihe Circuits Co., Ltd. | Heavy Copper PCB, pcb fabrication up to 12oz, large current, pcb circuitfabrication base material... | |
8 Layer ENIG Half Hole Custom PCB | 卖方: Xinfeng Huihe Circuits Co., Ltd. | Number of layers: 8 Surface finish: ENIG Base material: FR4 Outer Layer W/S: 4/3mil Inner lay... | |
4 Layer ENIG Impedance Control Half Hole PCB Electric Circuit Board | 卖方: Xinfeng Huihe Circuits Co., Ltd. | Number of layers: 4 Surface finish: ENIG Base material: FR4 Outer Layer W/S: 6/4mil Inner lay... |