PHD-12TF-277+

Surge Protection Type Digital Input Isolated Safety Barrier 
PHD-12TF-277+ 1 input and 2 outputs

Input: Switch contacts/proximity switches
Output: Relay

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PRODUCTS DETAILS

Overview

The isolated safety barrier with surge protection function of 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 a separate relay output and displayed on the top LED 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

Input in harzadous area
Input signal Switch contacts/proximity switches
The supply voltage of the sensor About 8V
Switching rate  <10Hz
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
Output normally "Open"/"Closed" When dial switch K1 is at "ON" side, the relay output is "Normally closed".
Contact conversion control When dial switch K1 is at "OFF" side, the relay output is "Normally closed".
When dial switch K2 is at "ON" side, the circuit selects indicating red light LFD alarm function.
Output in safe area
Output signal Relay and alarm relay (optional)
Contact capacity 250VAC/2A,30VDC/2A when subjected to resistive loads
Response time 20ms
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 <30mA(24V power supply, when the relay contacts close)
LED indicator  Green: Power indicator
Yellow: Output relay 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 Between intrinsically safe side and non-intrinsically safe side (≥3000VAC/min); between power supply and non-intrinsically safe side (≥1500VAC/min)
Insulation resistance ≥100MΩ (between input/output/power supply)
Electromagnetic compatibility According to IEC 61326-1 (GB/T 18268), IEC 61326-3-1
MTBF 100000h
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
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
Intrinsically safe certification
Explosion proof mark [Ex ia Ga]lIC [Ex ia Da]lllC
Explosion-proof standard GB/T3836.1-2021  GB/T3836.4-2021
Terminals 3-4 Um:250V AC/DC Uo=10.5V DC lo=15mA
Po=39.4mW Co=1.7μF Lo=165mH
Certification body CQST(China National Quality Supervision and Test Centre for Explosion Protected Electrical Products)
Shanghai lightning protection products testing center

Dimension

PHD-11TF-27+.jpg

Connection wiring

PHD-11TF-27+(1).jpg

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).

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