Digital Input
- Terminal Board
- Isolated Safety Barriers
- Signal Isolators
- Surge Protective Devices
- Safety Relays
- Isolated Intelligent I/O Modules
- Intelligent Gateways
- Industrial Data Optical Transceivers
- Online Dew Point Analyzers
- Data Acquisition Modules
- HART data converter
PHD-22TF-2828
Overview
The isolated safety barrier with switch input transistor output, which
isolates and transmits input signals from switch contacts or proximity
switches in hazardous areas to the safety zone with output transistor
through the safety barrier. Line fault detection is achieved through
LED on the top of the module. The dial switch of the module is used
to set input and output in-phase or reverse control, as well as to enable
or disable the line fault detection alarm indication function.
This product requires independent power supply, with isolated power
supply, input, and output terminals.
| Supply voltage | 20~35VDC, power consumption<1.0W |
| Input signal | Switch contact/proximity switch |
| Supply voltage from sensor side on site | 8V |
| Signal input characteristics | On-site input current: >2.1mA, it means ON; On-site input current: <1.2mA, it means OFF Switch hysteresis: 0.2ms |
| Transistor output characteristics | NPN type transistor emitter or collector open circuit output, drive capacity: output current ≤20mA (1.2KΩ), internal maximum current 100mA. Equipped with short-circuit current protection |
| 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 indication alarm function | |
| Indicating light alarm function | Field input current >7mA, short-circuit alarm (SC), on-site input current < 0.1mA, open-circuit alarm (LB). Switch contact input, when disconnection detection function is required, a 10kΩ resistor should be connected in parallel at both ends of the switch (Please see the switch contact II in the wiring diagram below). |
| Number of input and output | 2 input 2 output |
| Applicable field equipments | Dry contact or NAMUR proximity switch in accordance with DIN 19234 standard. |
| Temperature parameter | Working temperature: -20℃~+60℃, storage temperature:-40℃~+80℃ |
| Relative air humidity | 10%~95%RH without condensation |
| Dielectric strength | Between intrinsically safe side and non-intrinsically safe side (≥ 3000VAC/min); between power supply and non-intrinsically safe terminal (≥ 1500VAC/min) |
| Insulation resistance | ≥100MΩ (between input/output/power supply) |
| External dimensions | Thickness 12.5mm x width 108mm x high 118mm |
| Electromagnetic compatibility | According to IEC 61326-1(GB/T 18268), IEC 61326-3-1 |
| Explosion-proof mark | [Exia Ga]IIC |
| Functional safety certification | SIL3 according to IEC 61508 EN 61511 standards |
| Certification Body | CQST(China National Quality Supervision and Test Centre for Explosion Protected Electrical Products) |
| Certified parameters (between terminals1-2, 3-4) | Um=250V Uo=10.5V Io=15mA Co=1.7μF Lo=150mH Po=39.4mW |
| Installation site Requirements | It can be connected with instruments in 0 zone with ⅡA, ⅡB, ⅡC dangerous gas |
| MTBF | ≤100000h |
PHD-11TC-33A-23
PHD-22TF-2828