Protection grade: GB 4208-93 IP 66
The performance of telephone calls: GB / T 15279-94
The scope: metro, light rail, highways, power plants, water plants, chemical plants, mines, etc.
Shape Description:
Dimensions: 320 * 205 * 120mm
Weight: 5.5KG
Installation size: 139 * 260mm with M8 screw installation
Main technical indicators:
Apply to feed for 48 ~ 60V voltage range of program-controlled switchboard and scheduling switch system;
Temperature: -30 ~ 60 ° C
Relative Humidity: 10% ~ 95%
Atmospheric pressure: 86 ~ 106Kpa
Environmental Noise: ≤ 60dB (A)
Ring vibration level: ≥ 70dB (A)
Standard frequency: low frequency group: 697,770, 852, 941Hz
High-frequency group: 1209, 1336, 1477Hz
Frequency deviation: less than ± 1.5%
When the user 3KM line-level signal when:
Standard frequency: low frequency group:-9dB ± 3dB
High-frequency group:-7dB ± 3dB
Combination of high-low-frequency electrical signal adjustment: 2 ± 1dB
Intermodulation caused by harmonic distortion than the total fundamental low-level, at least 20dB
Call transfer indicators: (5KM) SLR ≤ 12, RLR ≤ -1,
STMR ≥ 10
Output Impedance: 600Ω
With super-strong group of 12 memory dialing numbers (each number up to 16)
Waterproof dust explosion-proof telephone DWE12-SCB / China
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