Product Description
Benefits & Applications
The Schneider Electric ZB4BZ101 is a high-reliability 1NO (Normally Open) contact block designed for use with Schneider’s Harmony XB4 metal pushbutton and selector switch operators. Built with durable silver alloy contacts and a secure bayonet-style mounting system, the ZB4BZ101 provides long electrical life and consistent performance in demanding industrial environments.
This auxiliary contact block installs quickly onto XB4 operator heads, allowing panel builders, OEMs, and maintenance teams to expand control circuits or replace worn contacts without modifying the main operator mechanism. It is ideal for start functions, enabling circuits, and PLC input signaling.
Typical Applications
- Start circuits and momentary activation functions
- PLC input and automation control signaling
- Industrial machinery and OEM equipment
- Motor starters and interlock circuits
- Building automation and commercial control systems
Technical Advantages
- 1 Normally Open (1NO) auxiliary contact
- Bayonet-style mounting for fast, secure installation
- High mechanical endurance suitable for frequent operation
- Wide operating temperature range for industrial environments
- Silver alloy contacts for reliable low-level switching
- Compatible with most Harmony XB4 and XB5 operators
Compatibility Notes
The ZB4BZ101 is compatible with the following Schneider Electric platforms:
- Harmony XB4 metal pushbutton operators
- Harmony XB5 plastic pushbutton operators (with adapter)
- Selector switches, key switches, and emergency stop operators
- Control stations and OEM operator panels
If you need a reliable 1NO auxiliary contact for a Schneider XB4/XB5 pushbutton or selector switch, the ZB4BZ101 is the correct OEM part.
Frequently Asked Questions
Q: What does “1NO” mean for the ZB4BZ101?
“1NO” means the contact is Normally Open. It closes only when the pushbutton or selector switch is actuated. This makes it ideal for start or enable functions.
Q: Is the ZB4BZ101 compatible with Harmony XB4 operators?
Yes, it is designed specifically for the Harmony XB4 metal operator line and fits directly into the mounting base.
Q: Can the ZB4BZ101 be used on XB5 pushbuttons?
Yes. It is compatible with XB5 plastic operators when used with the appropriate adapter or mounting collar.
Q: Can multiple ZB4BZ101 blocks be stacked?
Yes, you can stack additional ZB4BZ101 (NO) or ZB4BZ102 (NC) contact blocks to create multi-contact configurations.
Q: What is the difference between ZB4BZ101 and ZBE101?
Both provide a 1NO auxiliary contact, but:
ZB4BZ101 is for Harmony XB4/XB5 pushbuttons.
ZBE101 is for TeSys D contactors, relays, and control devices.
