Overview
Isolated safety barrier at detection end: PHD-11TC-33*, communication signal input, single input and single output. The safety barrier can realize the bilateral communication of half duplex digital signals between RS485 interface in dangerous area and RS485 interface in safe area.
This product needs an external 20-35VDC power supply.
The product is equipped with signal status indicator (yellow)
In model letter: PHD-11C-33* the character "*" represents the provided voltage, and the regulations are as follows:
| Code | Provided voltage, current |
| No | No provided power |
| A | 5V |
| B | 6V |
| C | 12V |
| F | 24V |
| H | User defined |
* bus terminal power supply, please see appendix for details.
Specifications
|
Supply voltage |
20~35VDC, power consumption <2.5W (24VDC, when provided power supply is 5 V with 80mA load） |
|
Input signal |
RS485 half-duplex digital signal |
|
Output signal |
RS485 half-duplex digital signal |
|
Number of input and output channels |
1 input 1 output |
|
Applicable field equipments |
Equipment with RS485 half-duplex communication interface |
|
Transmission rate |
Transmission rate ≤115.2kbps |
|
Transmission delay |
≤10 μs |
|
Sending and receiving switching time |
≥20ms |
|
Temperature parameters |
Working temperature: -20℃~+60℃, storage temperature:-40℃~+80℃ |
|
Relative humidity |
10%~95% RH no 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 |
|
Certification Body |
CQST(China National Quality Supervision and Test Centre for Explosion Protected Electrical Products) |
|
Authentication parameters (between terminals 1-2) |
Um=250V Uo=17.85V Io=250mA Co=0.22μF Lo=0.25mH Po=1.12W |
|
Authentication parameters (between terminals 3-4) |
Um=250V Uo=7.7V Io=80mA Co=6.9μF Lo=5.0mH Po=0.15W |
|
Installation site Requirements |
It can be connected with instruments in 0 zone with ⅡA, ⅡB, ⅡC dangerous gas |
|
MTBF |
≤100000h |
Wiring diagram
Terminal assignments and dimensions
|
Terminal |
Terminal assignments |
|
|
9 |
Power supply + |
20～35VDC |
|
10 |
Power supply - |
|
|
3 |
Intrinsically safe side RS485-A |
|
|
4 |
Intrinsically safe side RS485-B |
|
|
1 |
Provided power supply+ |
|
|
2 |
Provided power supply- |
|
|
6 |
RS485-A |
|
|
7 |
RS485-B |
|
