100-DS1-11

The Allen Bradley 100-DS1-11 is an auxiliary contact block engineered for side-mount installation on 100-D series contactors. This two-pole electrical contact block provides one normally open and one normally closed contact configuration, enabling precise control signal feedback in motor control and load switching applications. Designed for left or right inside mounting, the 100-DS1-11 integrates directly with Bulletin 100 contactors to expand control capabilities without requiring additional panel space. The unit operates reliably at voltages up to 600VAC with a maximum current rating of 10A, making it suitable for industrial environments where dependable auxiliary switching is critical. Certified to UL, CCC, and KC standards, this contact block delivers consistent performance across global markets. The compact form factor and tool-free installation reduce wiring complexity and maintenance downtime, while the robust construction withstands the mechanical stress of frequent contactor cycling in demanding manufacturing operations.

Overview of Allen Bradley 100-DS1-11

The Allen Bradley 100-DS1-11 auxiliary contact block serves as a critical interface component in contactor-based control systems. Part of the Bulletin 100 family, this block attaches to the side of 100-D series contactors to provide additional switched contacts that mirror the contactor's state. When the main contactor energizes, the auxiliary contacts change state simultaneously, allowing operators to route control signals to PLCs, indicator lights, interlocks, or downstream devices. The 1NO/1NC configuration offers maximum flexibility for both normally open and normally closed circuit requirements in a single assembly. Installation requires no special tools—the block snaps onto either side of the contactor housing and locks securely into position. Electrically rated for low-level switching at 10mA minimum and 17V, the 100-DS1-11 handles pilot duty circuits with precision. Its dual-contact design supports simultaneous monitoring of contactor status and fail-safe interlocking in multi-stage process control sequences, making it an essential component for machine builders and panel integrators seeking reliable auxiliary switching in compact industrial control architectures.

Key Features of Allen Bradley 100-DS1-11

• Side-mount configuration for left or right installation on 100-D series contactors
• One normally open and one normally closed contact in a single block
• Rated for 600VAC maximum voltage and 10A current capacity
• Contact rating down to 10mA at 17V for low-level pilot duty applications
• UL, CCC, and KC certified for international compliance
• Tool-free snap-on mounting for quick installation and replacement
• Compact two-pole design conserves panel space

Technical Specs of 100-DS1-11

Applications / Use Case

The Allen Bradley 100-DS1-11 finds primary application in motor control panels where contactor status feedback is required for PLC input, HMI displays, or sequential logic control. In elevator systems, the block provides critical interlock signals that prevent conflicting motor commands and confirm contactor engagement before enabling drive movement. HVAC installations use the 100-DS1-11 to signal fan or pump operation status to building automation controllers, allowing coordinated control of multi-zone climate systems. Manufacturing assembly lines incorporate these auxiliary contacts to sequence conveyor drives, actuate downstream equipment only when upstream contactors verify motor start, and create fail-safe lockouts that prevent machinery from operating under fault conditions. Pump control stations deploy the 1NO/1NC configuration to activate run indicator lights while simultaneously feeding back status to SCADA systems for remote monitoring. The block's dual-contact design supports both positive confirmation of contactor closure through the normally open contact and fault detection through the normally closed contact, which opens to signal an alarm condition. In packaging machinery, the 100-DS1-11 enables coordinated motion control by providing contactor state information that synchronizes multiple motors across filling, capping, and labeling stations, reducing product damage and improving throughput in high-speed automated production environments.

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