Comprehensive Selection Guide for Telephone MDF BLOCKS -Krone Type

Technical Innovations: 45° Angle Cross

1. The 3-point Insulation Displacement Connection (IDC) method of termination gives durable and long lasting connections. Insulation clamping ribs hold wires firmly in position and isolate the contact area from vibration and other forms of mechanical stress.
2. Flexible silver-plated contacts, positioned at 45° angle across the axis of the wire, make a solid, gas tight connection.
3. Constant axial and torsion restoring forces, created by the unique contract and plastic housing, sustains a durable connection.

Positioning the contacts at a 45°angle leaves more wire between contact points and provides a reliable, stress resistant connection.

Positioning contacts at a 90° angle produces a point of weakness subject to possible breakage.

Advantage:

1. High-Efficiency IDC Technology: Krone modules utilize Insulation Displacement Connection (IDC), enabling tool-terminated, no-strip wiring for fast, error-free installations.
2. Space-Saving & High Density: Compact design maximizes port density in racks (e.g., 19-inch frames), ideal for data centers with limited space. (Such as: NT Series is the most high density series)

1. Superior Electrical Performance:
   1. Low insertion loss and crosstalk (supports Cat3 Cat5 Cat5e and Cat6). (e.g: Highband series can reach Cat5e, Cat6 Speed)

   

   1. Gas-tight connections ensure long-term stability and minimal oxidation.
2. Cost-Effective & Future-Proof: Reduces labor/time costs and supports upgrades without overhauling infrastructure.

There are 4 types contact type which can used in different systems.

Type	Contact Image	Apperance Color	Features
Disconnection		Cover: Grey Body: White	Disconnection Modules use a two piece contact (normally closed), with a convenient disconnection feature. By inserting a disconnect plug into a wire pair, you can temporarily or permanently disconnect the circuit. A Test Cord can be inserted into a pair to test each side look both ways of the circuit independently. This greatly accelerates fault identification. The centre contact point can also be used for monitoring or over voltage protection.
Connection		Cover: Grey Body: Grey	Connection Modules have a one piece contact providing a continuous link between permanent wiring and jumper wiring, giving provision for monitoring access and overvoltage protection
Switching		Cover: Grey Body: White	Switching Modules house individual contacts and hence the circuits are disconnected when idle. By inserting plugs, cords or over voltage protection, the circuits can be connected whennecessary
Earthing		Cover: Grey Body: Red	Depending on the version, the LSA-PLUS earth modules (connection contacts) permit the routing of up to 36 cable wires to one common electrical potential. Via a permanently connected, flexible earth line, the backmount frame or an earth terminal is connected to earth potential.

Disconnection is most popular in the market.

1. Back Mount Frame
2. Profile Tube
3. Printed Circuit Board (PCB)

The Protector Unit has the function of preventing damage to internal equipment and personal injury caused by Overvoltage and Overcurrent entering from external lines; It has an alarm function and emits audible and visible signals when an alarm is triggered.

1 Pair Protector Unit (With Led)

1 Pair Protector Unit (Without Led) 

Tips: Many projects in practice DO NOT require illuminated protector unit—as the project donot install MDF column alarms and MDF main alarms for visual signaling, also the cabinet room is not big, which is easy to find the issue point.

The Protection Magazine: refers to the overall protection module on the main distribution frame (MDF), which integrates multiple protector Unit and is used to centrally manage the over-voltage protection of communication lines

3 Pole 10 Pairs Protection Magazine for LSA-Plus Module

10 Pairs Protection Magazine for 10 Pairs NT Series Module (High Density Series) (Remarks: this protection magazine can be Overvoltage & Overcurrent Protection)