Product Description
Benshaw RMSP-LX11 — Side-Mount Auxiliary Contact Block (1 N.O. / 1 N.C.)
The Benshaw RMSP-LX11 is a 2-pole, 1 N.O. / 1 N.C. side-mount auxiliary contact block designed as an accessory for the Benshaw RMSP Series Manual Motor Starter Protectors. It mounts directly to the left side of compatible RMSP units without tools, adding auxiliary switching outputs for signalling, interlocking, and PLC input circuits in industrial motor control panels. One RMSP-LX11 module can be fitted per RMSP unit. For applications requiring front-mounting, see the RMSP-FX11.
Quick Specifications
- Product Type: Side-Mount Auxiliary Contact Block
- Contact Configuration: 1 Normally Open / 1 Normally Closed (1 N.O. / 1 N.C.)
- Number of Poles: 2-pole
- Mounting Type: Side mounting — left side of RMSP unit
- Modules Per RMSP Unit: 1 (maximum)
- Compatible Units: Benshaw RMSP-32H, RMSP-63H, RMSP-100H
- Standards: IEC 60947, UL 508, CSA C22.2 No. 14
- Certifications: UL listed, cUL listed, CE, TÜV Rheinland, IEC 60947
- Degree of Protection: IP20 (IEC 60529)
- Warranty: 2 years (Benshaw factory warranty — the only 2-year guarantee in the industry)
- Not compatible with: RSC/RC contactors, RMSO/SPO overload relays, or any non-RMSP device
- Front-mount equivalent: RMSP-FX11
Compatible RMSP Manual Motor Starter Protectors
The RMSP-LX11 side-mounts directly to the following Benshaw RMSP Series units. Verify your base unit part number before ordering.
| RMSP Base Unit | Frame | Current Range | RMSP-LX11 Compatible |
|---|---|---|---|
| RMSP-32H | 32AF | 0.16–32 A | Yes |
| RMSP-63H | 63AF | 10–63 A | Yes — cannot be combined with RMSP-LA on this frame |
| RMSP-100H | 100AF | 17–100 A | Yes |
RMSP Series Auxiliary Contact Accessories — Comparison
The RMSP-LX11 is one of four side-mount signal accessories available for the RMSP Series. Select the correct accessory for your application.
| Part Number | Description | Mounting | Configuration | Function |
|---|---|---|---|---|
| RMSP-LX11 | Auxiliary Switch (this item) | Side — left | 1 N.O. / 1 N.C. | Auxiliary signalling and interlocking |
| RMSP-FX11 | Auxiliary Switch | Front | 1 N.O. / 1 N.C. | Auxiliary signalling and interlocking |
| RMSP-LA | Any Trip Alarm Switch | Side — left | 1 N.O. / 1 N.C. | Alarm output on any trip condition |
| RMSP-LAM | Magnetic Trip Alarm Switch | Side — left | 1 N.O. / 1 N.C. | Alarm output on magnetic (short-circuit) trip only |
Product Features
- Side-Mount Design — Left Side: Clips directly onto the left side of compatible RMSP units without additional hardware or tools, keeping the panel footprint compact and enabling fast field installation.
- 1 N.O. / 1 N.C. Output: Provides one normally open and one normally closed switching contact in a single module — suitable for motor run status indication, PLC input signals, remote alarm outputs, and interlocking circuits simultaneously.
- Snaps On Without Tools: The auxiliary contact block attaches to the RMSP body using Benshaw's tool-free snap-on system, reducing installation time and eliminating the risk of loose mounting hardware in the panel.
- One Module Per RMSP: Only one RMSP-LX11 can be fitted per RMSP unit. If both side-mount auxiliary contacts and alarm switching are required, confirm accessory combination compatibility for your RMSP frame size before ordering.
- Compatible with Complete RMSP Combination Starter: The RMSP series couples directly to Benshaw RC Series contactors via the RMSP-DA contactor adapter to form a complete electromechanical combination starter. The RMSP-LX11 integrates into this assembly without modification.
- Full Certification Coverage: Carries UL listed, cUL listed, CE, and TÜV Rheinland approvals. Compliant with IEC 60947, UL 508, and CSA C22.2 No. 14 — suitable for North American and international industrial panel builds.
- Backed by Benshaw's Industry-Exclusive 2-Year Warranty: All Benshaw RMSP Series products and accessories carry a two-year factory warranty — the only two-year guarantee in the industry for modular motor control accessories. Other manufacturers limit coverage to one year.
Stock Item – Order before 4:00 PM EST for Same-Day Shipping. Sold as individual units.
Frequently Asked Questions
What is the difference between the RMSP-LX11 and the RMSP-FX11?
Both are 1 N.O. / 1 N.C. auxiliary contact blocks for the Benshaw RMSP Series Manual Motor Starter Protectors, but they mount in different positions. The RMSP-LX11 mounts on the left side of the RMSP unit. The RMSP-FX11 mounts on the front. Both provide the same 1 N.O. / 1 N.C. switching configuration. Choose based on your panel layout and which mounting face is accessible in your enclosure. Only one auxiliary contact block can be fitted per RMSP unit regardless of mounting type.
Which RMSP units is the RMSP-LX11 compatible with?
The RMSP-LX11 is compatible with the RMSP-32H (0.16–32A, 32AF frame), the RMSP-63H (10–63A, 63AF frame), and the RMSP-100H (17–100A, 100AF frame). It is not compatible with Benshaw RC/RSC contactors, RMSO/SPO overload relays, or any other Benshaw product series. Check the part number on your base unit before ordering. Call 1-800-222-5129 to confirm if unsure.
Can I fit both the RMSP-LX11 and an alarm switch (RMSP-LA) on the same unit?
This depends on the frame size. The RMSP-63H cannot accept the RMSP-LX11 and the RMSP-LA simultaneously — these two accessories share the same side-mount position on that frame. On the RMSP-32H and RMSP-100H, multiple side-mount accessories can be combined, but always confirm the specific combination against the Benshaw RMSP accessory compatibility table before ordering. If you need both auxiliary switching and alarm output on a 63H frame, contact our team at 1-800-222-5129 for guidance.
What does "1 N.O. / 1 N.C." mean for the RMSP-LX11?
The RMSP-LX11 provides two independent contact outputs in one block. The N.O. (normally open) contact is open when the RMSP is in the ON position and closes when the unit trips or is switched OFF — or vice versa, depending on your wiring. The N.C. (normally closed) contact is the opposite state. This allows a single RMSP-LX11 to simultaneously drive a run indicator signal on the N.O. contact and a fault alarm on the N.C. contact, for example. Refer to the RMSP-LX11 wiring diagram in the Benshaw Control Products Catalog for terminal identification.
Can the RMSP-LX11 be used with Benshaw RC or RSC contactors?
No. The RMSP-LX11 is exclusively an accessory for RMSP Series Manual Motor Starter Protectors. For auxiliary contacts on Benshaw RC-9A through RC-150A contactors, the correct side-mount accessory is the RC-UA1. For RSC-180 through RSC-800 contactors, use the RC-AU100. These are different product families with different mounting interfaces and are not interchangeable.
Does the RMSP-LX11 carry UL and CSA listing?
Yes. The Benshaw RMSP Series and its accessories are UL listed and cUL listed, conforming to UL 508 and CSA C22.2 No. 14. The series also carries CE marking and TÜV Rheinland approval, making it suitable for North American and international industrial panel builds. The RMSP Series additionally holds IEC 60947 approval, NEMA compliance, and numerous other global certifications including KSA QA, EMS, LR, and KEPIC.
Is the RMSP-LX11 in stock for same-day shipping?
Yes — the RMSP-LX11 is a regularly stocked item at Kent Electrical Supply's warehouse in Emmaus, PA. Orders placed before 4:00 PM EST ship the same business day. Current stock quantity is shown on this page. Sold as individual units. For questions about compatibility, quantity pricing, or mixed RMSP accessory orders, call us at 1-800-222-5129 or text your RFQ to 484-425-0652.
