Brainchild Safety L91 Temperature Protection adalah perlindungan suhu berlebih atau perangkat keamanan batas tinggi dengan output pengunci, yang menghilangkan daya dalam kondisi abnormal selama proses yang lebih tinggi dari titik setel batas tinggi atau lebih rendah dari titik setel batas rendah.
Deskripsi Brainchild Safety L91 Temperature Protection
Brainchild Safety L91 Temperature Protection didukung oleh pasokan 11-26 atau 90-264 VDC/VAC, menggabungkan 3 amp. bentuk relai C untuk kontrol batas, input universal yang sepenuhnya dapat diprogram untuk PT100, termokopel tipe J, K, T, E, B, R, S, N, L, dan 0~60mV, port opsi tersedia untuk salah satu fungsi berikut: keluaran alarm, antarmuka komunikasi RS-485, keluaran catu daya DC, keluaran pemberi sinyal batas, dan masukan acara.
Opsi output alternatif termasuk drive SSR dan triac. Sinyal input didigitalkan dengan menggunakan konverter A-to-D 18-bit. Kecepatan pengambilan sampelnya yang cepat (5 kali/detik) memungkinkan L91 untuk mengontrol proses cepat seperti tekanan dan aliran.
Komunikasi digital RS-485 tersedia sebagai opsi tambahan. Opsi ini memungkinkan L91 untuk diintegrasikan dengan sistem kontrol pengawasan. Output alarm adalah pilihan lain. Berbagai fungsi alarm dan mode alarm dapat diprogram untuk aplikasi tertentu. Opsi keluaran catu daya DC digunakan untuk sensor atau pemancar eksternal. Opsi input peristiwa dapat diprogram untuk reset jarak jauh atau input sinyal kunci jarak jauh. Opsi pemberi sinyal batas dapat digunakan untuk mengontrol bel alarm.
Tiga jenis metode dapat digunakan untuk memprogram L91:
- Gunakan tombol di panel depan untuk memprogram unit secara manual,
- Gunakan PC dan perangkat lunak pengaturan untuk memprogram unit melalui port RS-485 dan
- Gunakan komputer dan perangkat lunak konfigurasi untuk memprogram unit melalui port pemrograman.
Akurasi tinggi, fleksibilitas maksimal, respon cepat dan ramah pengguna adalah fitur utama L91.
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Spesifikasi Brainchild Safety L91 Limit Controller
Power
90 – 250 VAC, 47 – 63 Hz, 10VA, 5W maximum
11 – 26 VAC / VDC, SELV, Limited Energy, 10VA, 5W maximum
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Brainchild Safety L91 Limit Controller Signal Input
| Signal Input | Characteristics |
|---|---|
| Resolution | 18 bits |
| Sampling Rate | 5 times/second |
| Maximum Rating | -2 VDC minimum, 12 VDC maximum( 1 minute for mA input ) |
| Temperature Effect | ±1.5 uV/ °C for all inputs except mA input ±3.0 uV/ °C for mA input |
| Sensor Lead Resistance Effect | T/C: 0.2uV/ohm 3-wire RTD: 2.6 °C/ohm of resistance difference of two leads 2-wire RTD: 2.6 °C/ohm of resistance sum of two leads 200nA |
| Common Mode Rejection Ratio ( CMRR ) | 120dB |
| Burn-out Current | 200nA |
| Sensor Break Detection | Sensor open for TC, RTD, and mV inputs, below 1 mA for 4-20 mA input, below 0.25V for 1 – 5 V input, unavailable for other inputs. |
| Sensor Break Responding Time | Within 4 seconds for TC, RTD, and mV inputs, 0.1 second for 4-20 mA and 1 – 5 V inputs. |
Accuracy
| Characteristics | |||
|---|---|---|---|
| Type | Range | 　Accuracy@ 25 °C | Input Impedance |
| J | -120 ~ 1000 °C (-184 ~ 1832 °F) | ±2 °C | 2.2MΩ |
| K | -200 ~ 1370 °C (-328 ~ 2498°F) | ±2 °C | 2.2MΩ |
| T | -250 ~ 400°C (-418 ~ 752°F) | ±2 °C | 2.2MΩ |
| E | -100 ~ 900 °C (-148 ~ 1652 °F) | ±2 °C | 2.2MΩ |
| B | 0 ~ 1800 °C (32 ~ 3272 °F) | ±2 °C (200°C – 1800°C) | 2.2MΩ |
| R | 0 ~ 1767.8 °C (32 ~ 3214 °F) | ±2 °C | 2.2MΩ |
| S | 0 ~ 1767.8 °C (32 ~ 3214 °F) | ±2 °C | 2.2MΩ |
| N | -250 ~ 1300 °C (-418 ~ 2372 °F) | ±2 °C | 2.2MΩ |
| L | -200 ~ 900 °C (-328 ~ 1652 °F) | ±2 °C | 2.2MΩ |
| PT100 (DIN) | -210 ~ 700 °C (-346 ~ 1292 °F) | ±0.4°C | 1.3KΩ |
| PT100 (JIS) | -200 ~ 600 °C (-328 ~ 1112 °F) | ±0.4°C | 1.3KΩ |
| mV | -8 ~ 70mV | ±0.05% | 2.2MΩ |
| mA | -3 ~ 27mA | ±0.05% | 70.5Ω |
| V | -1.3 ~ 11.5V | ±0.05% | 650KΩ |
Input 2
| Resolution | 18 bits |
| Sampling Rate | 1.66 times/second |
| Maximum Rating | -2 VDC minimum, 12 VDC maximum |
| Temperature Effect | ±1.5uV/ °C for all inputs except mA input ±3.0uV/ °C for mA input |
| Common Mode Rejection Ratio ( CMRR ) | 120dB |
| Normal Mode Rejection Ratio ( NMRR ) | 55dB |
| Sensor Break Detection | Below 1 mA for 4-20 mA input, below 0.25V for 1 – 5V input, unavailable for other inputs. |
| Sensor Break Responding Time | 0.5 second |
Output
| Output 1 / Output 2 | |
|---|---|
| Relay Rating | 2A/240 VAC, life cycles 200,000 for resistive load |
| Pulsed Voltage | Source Voltage 5V, current limiting resistance 66Ω |
| Triac ( SSR ) Output | |
|---|---|
| Rating | 1A / 240 VAC |
| Inrush Current | 20A for 1 cycle |
| Min. Load Current | 50 mA rms |
| Max. Off-state Leakage | 3 mA rms |
| Max. On-state Voltage | 1.5V rms |
| Insulation Resistance | 1000 Mohms min. at 500 VDC |
| Dielectric Strength | 2500 VAC for 1 minute |
| DC Voltage Supply Characteristics ( Installed at Output 2 ) | ||||
|---|---|---|---|---|
| Type | Tolerance | Max. Output Current | 　Ripple Voltage | Isolation Barrier |
| 20V | ±1 V | 25 mA | 0.2 Vp-p | 500 VAC |
| 12V | ±0.6 V | 40 mA | 0.1 Vp-p | 500 VAC |
| 5V | ±0.25 V | 80 mA | 0.05 Vp-p | 500 VAC |
Data Communication
| Data Communication | |
|---|---|
| Interface | RS-232 ( 1 unit ), RS-485 ( up to 247 units ) |
| Protocol | Modbus Protocol RTU mode |
| Address | 1 – 247 |
| Baud Rate | 0.3 ~ 38.4 Kbits/sec |
| Data Bits | 8 bits |
| Parity Bit | None, Even or Odd |
| Stop Bit | 1 or 2 bits |
| Communication Buffer | 50 bytes |
Interface
| User Interface | Dual 4-digit LED Displays |
|---|---|
| Keypad | 4 keys |
| Programming Port | For automatic setup, calibration, and testing |
| Communication Port | Connection to PC for supervisory control |
Limit Control
High Limit, Low Limit, and High/Low Limit programmable
Digital Filter
Function: First-order
Time Constant: 0, 0.2, 0.5, 1, 2, 5, 10, 20, 30, 60 seconds programmable
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Environmental & Physical
| Operating Temperature | -10°C ~ 50°C |
| Storage Temperature | -40°C ~ 60°C |
| Humidity | 0 to 90 % RH ( non-condensing ) |
| Altitude | 2000m maximum |
| Pollution | Degree 2 |
| Insulation Resistance | 20 Mohms min. ( at 500 VDC ) |
| Dielectric Strength | 2000 VAC, 50/60 Hz for 1 minute |
| Vibration Resistance | 10 – 55 Hz, 10 m/s² for 2 hours |
| Shock Resistance | 200 m/s2( 20 g ) |
| Moldings | Flame retardant polycarbonate |
| Dimensions | 96mm(W) X 96mm(H) X 65mm(D), 53 mm depth behind panel |
| Mounting | 48mm(W) X 48mm(H) X 94mm(D), 86 mm depth behind panel |
| Weight | 150 grams |
Approval Standards
| Safety | FM Class 3545 (Oct. 1998), UL873 ( 11’th edition, 1994 ) , CSA C22.2 No. 24-93 , EN61010-1 (IEC1010-1) |
| Protective Class | IP30 front panel, indoor use, IP20 housing and terminals ( with protective cover) |
| EMC | EN61326 |
Sumber: brainchildtw.com | inaparts.comÂ
