Overview
The communication signal of PHD-11TC-11 is input into the isolated safety barrier, which can realize the two-way communication of RS-485 Half Duplex digital signal in the dangerous area and the safe area. The circuit provides power distribution for on-site instruments. The voltage value can be switched through the top dial switch. The specific operation method is shown in the chart below.
This product needs independent power supply, and the power supply, input and output are isolated.
Specifications
| Input in harzadous area | |
| Input signal | RS-485 Half Duplex Digital Signal |
| Safety side output: | |
| Output signal | RS-485 Half Duplex Digital Signal |
| Transmission delay | ≤10μs |
| Transmission rate | ≤1.2kbps~56kbps |
| Supply voltage | 20-35VDC |
| Power consumption | ≤150mA (24V power supply, 6V/100mA power distribution.) |
| LED indicator | Green: Power indicator Yellow: Signal transmission from safety zone to harzadous zone Red: Signal transmission from harzadous zone to safety zone |
| Receiving and transmitting 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) |
| 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 | Communication interface device with RS-485 Half Duplex Digital Signal |
| 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 2-3 | Um:250V AC/DC Uo=17.8V DC lo=260mA Po=1.2W Co=0.22μF Lo=0.25mH |
| Terminals 5-6 | Um:250V AC/DC Uo=7.7V DC lo=80mA Po=0.15W Co=6.9μF Lo=5mH |
| Certification body | CQST(China National Quality Supervision and Test Centre for Explosion Protected Electrical Products) |
Dimension
Schematic Diagram
Note:
1. The power rail function is an optional function, and users need to specify the power supply method when placing an order
The selection of power rail connectors can refer to page 89 of the "Annex"