1, low rack height 6000 loop-sided MDF total height of only 2.6 meters, omit the slide, convenient and safe; 2, the frame is aluminum, the overall appearance. Without drilling on profiles, and other chassis and frame, easy expansion; 3, the contact part with gold plating, to ensure that no oxidation, access to reliable, low resistance; harmony, Arranging, a line number 4, chassis and modules tone one correspondence, make eye-catching; 5, high density, high strength, light weight, compared to other similar domestic products, a small space under the same capacity; 6, inside and outside into the side, jumpers are using a card Crimping tool, convenient and reliable, and fast. Working conditions: Operating temperature: + 5 ℃ - + 40 ℃ Relative humidity: <85% (+ 30 ℃) Atmospheric pressure: <70--106kPa performance indicators: Security Unit Contact resistance: ≤7mΩ Insulation resistance: ≥1000MΩ edge flow Protection: Safety Current: 90mA, 1h no action (ambient temperature + 40 ℃, the test voltage 60VDC) at room temperature DC resistance: ≤22Ω, a, b line resistance difference: ≤2Ω protection: DC breakdown voltage: 190V-- 260V breakdown voltage pulse: ≤800V (1KV / rate of voltage rise when the uS) security unit 04 security terminal block, test terminal block the contact resistance: Reed: ≤7mΩ to end: ≤3mΩ Insulation resistance: ≥1000MΩ Dielectric strength : ≥1000VAC (for 1min without breakdown, no arc) pull-off force: ≥25N core diameter: 0.40--0.60mm (insulation outer diameter <1.4mm) MDF Main Distribution Frame suitable for a variety of capacities telephone exchange office the connection between the cable equipment into the office, with good performance and reliable connection protection. Product sub: I type (card access), II (wrap style), III (double contact card access) three. Features: Press YD / T694-1999 latest standards. The frame is aluminum alloy bar, solid structure, good looks, easy installation. Test terminal block, single-contact-type, double-break style, around the cassette, angled snap reed, reliable connection. Security unit with overvoltage, overcurrent protection and grounding warning function. All operations of the main distribution frame (security device plug, inside and outside the lines and jumper connection and testing) are carried out in front. All plastic parts are flame resistant, flame-retardant performance to GB / T5169.7 in A-level requirements, other indicators are in line with Industry Standard YD / T694-2004 "MDF" technical performance requirements: Operating temperature : +5 ~ + 40 ℃ Relative humidity: <85% (+ 30 ℃) Atmospheric pressure: 70 ~ 106Kpa Insulation resistance: ≥6000MΩ Dielectric strength: 1000V (45 ~ 60Hz) / 1min no breakdown, no arc to end Contact resistance: ≤0.8mΩ, high temperature, low temperature, temperature changes, humidity, vibration test after the contact resistance value: ≤0.6mΩ tightness: uncorroded pull-off area of ??more than 75% of the total area of ??the force: a single wire along the module vertical pull-off force direction than 28N Wiring: single-strand plastic insulated wire, wire diameter Φ0.32 ~ Φ0.6mm, the maximum outer diameter (including insulation) is not more than 1.4mm snap life: more than 200 times the structure: 1: Rack appearance undefined 2: inline security arrangements undefined undefined 3: course testing arrangements, security units undefined 4: Specifications Model line-line distribution of the maximum capacity Width (mm) depth (mm) height (mm) JPX02-1200 2 600 500 1000 2000 JPX02-1800 3 600 750 1000 2000 JPX02-2400 4 600 1000 1000 2000 JPX02-4000 5 800 1250 1000 2200 JPX02-5000 5 1000 1250 1000 2700 JPX02-6000 5 1200 1250 1000 3150 Snap-MDF product Damage can be avoided by having the cable connecting the external lines invade large current cable, computer room equipment and personnel caused by overcurrent and overvoltage protection function. Since the connecting module design high-density, height and width module has decreased, so that the height and weight of the machine significantly reduced, increasing the distance between columns, which facilitates the inter-frame operation, while the engine room space utilization also improved .