Digital Input
- 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
- Terminal Board
PHD-12TF-299 PHD-22-2929
Overview
Switching input transistor output Isolated safety barriers transmit input signals from switching contacts or proximity switches in the hazardous area through the safety barriers in isolation to the safe area with transistor outputs. The input controls a passive transistor output with resistive characteristics. The output has four defined states: short-circuit alarm resistance ≤ 240 Ω, 1-signal 1.4KΩ ≤ resistance value ≤ 1.6KΩ, 0-signal 13KΩ ≤ resistance value ≤ 14KΩ, and broken alarm resistance > 100KΩ. This output characteristic reacts to the line state on the signal line. The dip switches of the module are used to set the input and output in the same direction or reverse control, as well as to set the line fault alarm indication function.
This product requires independent power supply, with isolated power supply, input, and output terminals.
| Specifications | |
| Input in harzadous area | |
| Input signal | Switch contacts/proximity switches |
| The supply voltage of the sensor | About 8V |
| Switching rate | ≤5kHz |
| Input/output characteristics: | |
| On site input current | When>2.1mA, the output is closed, indicating ON; When<1.2mA, the output is open circuit, indicating OFF |
| Input state transition and alarm switch: | When dial switch K1 and K3 are at "ON" side, the output state is opposite to the input state. When dial switch K1 and K3 are at "OFF" side, the output state is consistent with the input state. When dial switch K2 and K4 are at "ON" side, the circuit selects indicating red light LFD alarm function. |
| Output in safe area | |
| Output signal | Transistor (resistor), maximum withstand voltage ≤ 30V DC |
| Output characteristics | When the external power supply voltage is 8V, the short-circuit alarm resistance is ≤240Ω, 1- signal 1.4kΩ≤ resistance ≤1.6kΩ, 0- signal 13kΩ≤ resistance ≤14kΩ, Open circuit alarm resistance > 100kΩ |
| Basic parameters | |
| Supply voltage | 20~35V DC |
| Power consumption | 24V power supply, when the transistor is turned on |
| LED indicator | Green: Power indicator Yellow: 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 | Between intrinsically safe side and non-intrinsically safe side (≥3000VAC/min) |
| Insulation resistance | ≥100MΩ (between input/output/power supply) |
| EMC | According to IEC 61326-1 (GB/T 18268), IEC 61326-3-1 |
| Wire requirements | Cross-section ≥ 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 |
| Installation place | Installed in a safe zone, it can be connected to intrinsic safety instruments in hazardous areas up to Zone 0, IIC, Zone 20, and IIIC |
| Safe certification | |
| Explosion-proof mark | [Ex ia Ga] IIC [Ex ia Da] ⅢC |
| Explosion-proof standard | GB/T 3836.1-2021 GB/T 3836.4-2021 |
| Terminals 3-4、1--2 | Um：250V AC/DC，Uo=10.5V DC，Io=15mA, Po=39.4W，Co=1.7μF，Lo=165mH. |
| Certification body | CQST(China National Quality Supervision and Test Centre for Explosion Protected Electrical Products) |
Note:
1. PHD-12TF-299 does not contain output 2. 2.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 101.
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).
