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
PHD-12TF-277
Overview
The isolated safety barrier with switch input relay outputs, which isolates and transmits input signals from switch contacts or proximity switches in hazardous areas to of the safety zone with output relay 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.
Specifications
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Specifications |
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Input in harzadous area |
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Input signal |
Switch contacts/proximity switches |
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The supply voltage of the sensor |
About 8V |
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Switching rate |
<10Hz |
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Input/output characteristics: |
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On site input current |
>2.1mA, the output is closed, indicating ON; |
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Output normally "Open"/"Closed"
Contact conversion control
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When dial switch K1, K3 is at "ON" side, the relay output is "Normally closed". When dial switch K1、K3 is at "OFF" side, the relay output is "Normally closed".
When dial switch K2、K4 is at "ON" side, the circuit selects indicating red light LFD alarm function. |
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Output in safe area |
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Output signal |
Relay |
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Contact capacity |
250VAC/2A,30VDC/2A when subjected to resistive loads |
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Response time |
20ms |
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Basic parameters |
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Supply voltage |
20~35VDC |
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Power consumption |
24V power supply, when the relay contacts close
<30mA(PHD-12TF-277)
<40mA(PHD-22TF-2727)
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LED indicator |
Green: Power indicator
Yellow: Output relay in normal working state
Red: LFD indication, line fault alarm
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Temperature parameters |
Working temperature: -20℃ ~ +60℃, |
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Relative humidity |
10%~95% RH no condensation |
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Insulation strength |
Between intrinsically safe side and non-intrinsically safe side (≥3000VAC/min); between power supply and non-intrinsically safe side (≥1500VAC/min) |
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Insulation resistance |
≥100MΩ (between input/output/power supply) |
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Electromagnetic compatibility |
According to IEC 61326-1 (GB/T 18268), IEC 61326-3-1 |
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MTBF |
100000h |
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Wire requirements |
Horizontal cutting surface ≥ 0.5mm2; Insulation strength ≥ 500V |
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Applicable field equipments |
Field equipment such as dry contacts or NAMUR type proximity switch inputs that comply with DIN19234 standard |
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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 |
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Intrinsically safe certification |
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Functional safety certification |
SIL3 according to IEC 61508 standards |
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Explosion proof mark |
[Ex ia Ga]lIC [Ex ia Da]lllC |
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Explosion-proof standard |
GB/T3836.1-2021 GB/T3836.4-2021 |
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Terminals 3-4、1-2 |
Um:250V AC/DC Uo=10.5V DC lo=15mA
Po=39.4mW Co=1.7μF Lo=165mH
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Certification body |
CQST(China National Quality Supervision and Test Centre for Explosion Protected Electrical Products) |
Note:
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).
Terminal assignments and dimensions
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Terminal |
Terminal assignments |
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9 |
Power supply + |
20～35VDC |
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10 |
Power supply - |
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3 |
Input+ |
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4 |
Input- |
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5 |
Relay output 1 |
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6 |
Relay output 1 |
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7 |
Relay output 2 |
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8 |
Relay output 2 |
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Product Display
