Overview
Surge protection switch input transistor output signal isolator converts the input signal of the switch contact or proximity switch into a transistor output through isolation.
Line fault detection is output through a separate relay and displayed by an LED light on the top of the module. The switch of the module is used to select the phase of the channel and whether the line fault detection function is required.
This product needs to be powered independently, and the power supply, input and output terminals are isolated.
Specifications
| Input | |
| Input signal | Switch contacts/proximity switches |
| The supply voltage of the sensor | About 8V |
| Input frequency range | ≤5kHz |
| Input/output characteristics: | |
| On site input current | >2.1mA, the output is closed, indicating ON; When<1.2mA, the output is open circuit, indicating OFF |
| Switched control between inverted phase and normal phase of outputs e-c | When the dial switch K1 is at "ON", the transistor output e-c are in inverted phase When the dial switch K1 is at "OFF", the transistor output e-c are in normal phase When the K2 is at "ON", the circut will select the red light LFD indication alarm function |
| Output | |
| Output signal | Transistor and alarm relay (optional) |
| Drive capacity | Output current ≤20mA (1.2kΩ), internal maximum current 100mA, equipped with short-circuit current protection |
| Surge protection features: | |
| Nominal discharge current ln(8/20μs) | 5kA |
| Voltage protection level Up(8/20μs): | 60V(line to line) |
| Voltage protection level Up(8/20μs): | 600V(line to ground) |
| According to standards | GB/T18802.21-2016(equivalent to 1EC61643-21:2012) |
| Basic parameters | |
| Supply voltage | 20~35VDC |
| Power consumption | <1 W(24V power supply, when the transistor are in inverted phase) |
| LED indicator | Green: Power indicator Yellow: Output transistor in normal working state Red: LFD indication, line fault alarm |
| Temperature parameters | Working temperature: -20℃ ~ +60℃, Storage temperature: -40℃ ~ +80℃ |
| Relative humidity | 10%~95% RH no condensation |
| Insulation strength | ≥2000VAC/min (between input/output/power supply) |
| Insulation resistance | 100MΩ(500V DC) (between input/output/power supply) |
| Electromagnetic compatibility | GB/T 18268 (IEC 61326-1) |
| MTBF | 80000h |
| Wire requirements | Horizontal cutting surface ≥ 0.5mm2; Insulation strength ≥ 500V |
| Applicable field equipments | Field equipment such as dry contacts or NAMUR type proximity switch inputs that comply with DIN19234 standard |
Dimension
Connection wiring
Note:
1. The power supply of the power rail is an optional function. Users need to specify the power supply mode when ordering. Please refer to attachment on page 89.
Line Fault Detection
Users can select the "ON" side of the switch at the top of the module to enable fault detection function and indicate an alarm through the red LED light. On site input current>7mA, short circuit alarm (SC); On site input current<0.1mA, open circuit alarm (LB). If the switch contact input requires fault detection function (wire breakage, short circuit), a 22k Ω resistor should be connected in parallel at both ends of the switch, and a 680 Ω resistor should be connected in series (as shown in the wiring diagram for switch contact II).