Schneider DVZ 101 Single Contact Block

The Schneider DVZ 101 provides one normally open contact for pushbutton or selector switches. This single contact block mounts behind operator interface devices. You will find it in control panels and machine operator stations. It snaps directly into most Schneider Harmony series actuators. Therefore, this unit adds switching capability to existing controls.

This contact block measures 30 mm in height and 15 mm in width. Its depth reaches 25 mm for panel mounting. The unit weighs approximately 0.01 kilograms. It contains one silver-nickel contact with a rolling bridge mechanism. No internal PCB or electronic components exist. Additionally, you get one normally open contact configuration.

Key Technical Specifications

Internal Architecture and Energy Storage

The Schneider DVZ 101 stores absolutely no electrical energy internally. It contains no capacitors, inductors, or electronic parts. A silver-nickel contact provides excellent conductivity and corrosion resistance. A rolling bridge mechanism provides self-cleaning action during each operation. A stainless steel spring returns the contact to its normally open position. The contact block uses double-break technology for reliable switching. This design extinguishes arcs quickly when opening under load. The housing uses self-extinguishing thermoplastic material (UL94 V-0). A transparent cover allows visual inspection of the contact position.

Connection Interfaces and Wiring Details

You will find two M3.5 screw terminals on the contact block. Connect one wire to terminal 1 (common) and another to terminal 2 (output). Use 14 to 20 AWG copper wire for all connections. Strip 7 mm of insulation from each wire before insertion. Tighten each screw to 0.8 Nm of torque maximum. The Schneider DVZ 101 requires no external power supply for operation. It simply closes the circuit when the operator pushes the actuator. The contact block makes no LED or status indication. Use a multimeter in continuity mode to test contact operation.

Installation and Mounting Steps

You snap this contact block onto the base of a Harmony actuator. First, align the block with the actuator mounting guides. Then, push firmly until the latch engages with an audible click. The Schneider DVZ 101 attaches to XB4, XB5, or XB7 series operators. Stack up to five contact blocks on a single actuator. Connect the field wires to the screw terminals before mounting. For multiple blocks, connect each block in series as needed. Test the contact operation after final assembly. The contact closes when you press a pushbutton or rotate a selector. Always verify that the contact opens fully when released.