Product Description
Benefits & Applications
The Schneider Electric ZB4BZ103 is a compact dual auxiliary contact block featuring 1 Normally Open (1NO) and 1 Normally Closed (1NC) contact. Designed for use with the Harmony XB4 metal pushbutton and selector switch range, this versatile module enables combined start/stop, enable/disable, or interlock functions within a single operator station.
Built for industrial reliability, the ZB4BZ103 offers long mechanical life, secure snap-on mounting, and consistent low-level switching performance. It is widely used in automation systems, motor control circuits, PLC input signaling, and OEM control panels where flexible auxiliary logic is required.
Typical Applications
- Start/stop circuits using combined NO + NC logic
- Interlock and safety control functions
- PLC input and automation feedback
- Motor starter auxiliary signaling
- OEM machinery and industrial control panels
Technical Advantages
- 1NO + 1NC dual auxiliary contact configuration
- Tool-free snap-on installation for fast assembly
- High mechanical and electrical durability
- Reliable switching for low-voltage PLC circuits
- Robust build quality for industrial environments
- Compatible with Harmony XB4 and XB5 operators
Compatibility Notes
The ZB4BZ103 integrates with Schneider Electric’s Harmony XB4 metal operator range and is compatible with:
- Pushbuttons (illuminated and non-illuminated)
- Selector switches and key switches
- Mushroom-head and emergency stop operators
- XB5 plastic operators (with appropriate adapter)
If your application requires a combined 1NO + 1NC auxiliary contact for flexible control logic, the ZB4BZ103 is the correct Schneider OEM accessory.
Frequently Asked Questions
Q: What contact configuration does the ZB4BZ103 provide?
The module includes 1 Normally Open (1NO) and 1 Normally Closed (1NC) auxiliary contacts, making it ideal for dual-function control circuits.
Q: Is the ZB4BZ103 compatible with Harmony XB4 devices?
Yes. It is designed specifically for the Harmony XB4 metal operator series.
Q: Can this be used with XB5 plastic operators?
Yes. The ZB4BZ103 can be used with Harmony XB5 operators using the appropriate mounting adapter.
Q: Can additional auxiliary blocks be stacked?
Absolutely. ZB4BZ101 (NO) and ZB4BZ102 (NC) modules can be stacked with the ZB4BZ103 for expanded control logic.
Q: What is the difference between ZB4BZ102 and ZB4BZ103?
ZB4BZ102 = 1NC contact
ZB4BZ103 = 1NC + 1NO contact (dual) Choose the ZB4BZ103 when you need both start and stop logic in one module.
