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Brand: Banner Engineering
Banner RSr-L-SIL-8A-Q Remote Safety Relay, Latched
Description
An IP65/IP67 on-machine safety relay that turns OSSD outputs into 8 A contacts
The RSr-L-SIL-8A-Q is the latched version of Banner Engineering’s Remote Safety Relay (RSr). The RSr converts the low-current 24 V DC output signal switching device (OSSD) outputs of a safety device into high-current, pulse-free 24 V DC outputs with two 8-amp relay outputs, so that contactors, valves or drives can be switched directly. It is designed for use with Banner’s Remote Safety I/O block or any other OSSD output device.
Each unit is sealed in an industrial hardened housing and contains relays and internal monitoring circuits. The unit mounts directly on a machine, without a control cabinet, which allows OEMs and users to reduce installation and operating costs; the manual names packaging, material handling and automotive lines as typical uses.
Technical specifications
| Parameter | Specification |
|---|---|
| Model | RSr-L-SIL-8A-Q: L-code relay, two OSSD safety inputs, latched relay with reset input on the aux wire, two 8 A relay outputs, 5-pin M12 connectors |
| Companion model | RSr-L-SIT-8A-Q: trip version with an aux output on the aux wire |
| Input voltage / current | 24 V DC plus or minus 20 % (SELV/PELV); under 100 mA nominal; about 2.0 W |
| Safety input thresholds | ON above 15 V DC (guaranteed), 30 V DC maximum; OFF below 5 V DC and 2 mA |
| Reset input | ON above 15 V DC; duration 350 ms minimum, 3000 ms maximum |
| Output response time | 20 ms maximum |
| Simultaneity monitoring | 3 seconds going from OFF to ON; minimum OFF-state recovery 400 ms maximum |
| Output contacts | AgSnO2 plus 0.2 um gold; series contacts of forced-guided relays K1-K2 |
| Switched current | DC1: 24 V / 8 A; DC13: 24 V / 2 A; DC13 at 0.1 Hz: 24 V / 4 A |
| Aux output | Solid-state, 24 V at 70 mA |
| Safety data (printed) | Cat. 4 / PL e and SIL 3 with solid-state devices with short-circuit detection; MTTFd 209 years; PFHd 1.38 x 10^-9; proof test interval 20 years |
| Life | Over 40 million mechanical operations; 350,000 cycles DC13 24 V; 1,500,000 cycles DC1 24 V |
| Environmental rating | IP65 and IP67 (IEC 60529), indoor use only; body TPU, nickel-plated brass coupling |
| Operating / storage temperature | -25 degrees C to +60 degrees C / -30 degrees C to +70 degrees C; altitude 2000 m maximum |
| Mounting | Two M4 screws, 0.9 N-m |
Latched versus trip operation
The model key’s L-code distinguishes two behaviours. In the SIL version, the output relays latch after a safety input drops out and are re-armed by a pulse on the reset input carried on the aux wire; the manual shows an example with a string of E-stops having OSSD outputs and the reset on pin 4. The SIT version instead provides a trip output on the aux wire to tell the controller that the relay has tripped.
Application and ordering notes
Typical use is to expand the output capacity of a distributed safety system at a motor, valve bank or robot cell located far from the control cabinet. Transient suppression is recommended across inductive loads, never across the output contacts. Supply wiring leads smaller than 24 AWG must not be spliced and the unit needs an overcurrent device sized for the supply wire.
The manual warns that design and installation of the safety devices affect the level of circuit integrity and that a risk assessment per ISO 13849-1 must determine the required category. Please confirm latch or trip behaviour, supply and connector needs before ordering.
Documents and quotation
Quote requests are handled from this page: attach your tag list or the full code, and note the latched or trip model, supply and mating cordsets. The attached PDF (Banner Remote Safety Relay (RSr) product manual, p/n 252971 (manufacturer, unaltered)) is the reference for every value above, and it should be checked again for the final configuration. See also PLC & I/O Cards.
Datasheets & Documents
- Product Manual Banner Remote Safety Relay (RSr) product manual, p/n 252971 (manufacturer, unaltered) Download
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About brand
Banner Engineering is the American maker of industrial sensors, indicator lights, wireless monitoring and machine safety products. Bob Fayfield founded it in 1966 as a small engineering firm in the Minneapolis area. The company is privately held and still based in Minnesota.
Seven Star LLC lists Banner devices including the Q4X rugged stainless steel laser distance sensor and the K50 Pro Beacon IO-Link multicolor RGB indicator, and supplies Banner sensors and indicators to plants and machine builders in Oman.
Banner Engineering company profile
| Founded | 1966, Minneapolis, Minnesota, USA |
|---|---|
| Founder | Bob Fayfield |
| Headquarters | Minneapolis area, Minnesota, USA |
| Ownership | Privately held |
| Product families | Photoelectric, laser, ultrasonic and radar sensors, Q4X and Q5X measurement sensors, QM30VT vibration and temperature sensors, K50 and TL50 indicator lights, safety light curtains and switches, Sure Cross wireless and IO-Link devices |
Banner Q4X and K50 Pro
Banner offers the Q4X in four range versions, all starting at 25 mm: Q4X100 to 100 mm, Q4X300 to 300 mm, Q4X500 to 500 mm and Q4X600 to 600 mm. The series is available with discrete, analog and IO-Link outputs and has a display on the sensor. The K50 Pro Beacon is a status indicator whose color and behavior are set from the controller over IO-Link.
Banner Engineering products we list
Ordering Banner products: what we need
Send the complete Banner model number from the device label, because range, output type and connector are all coded into it. For the Q4X, state the measuring distance, the output your PLC input needs and the connector or cable style. For indicators, give the housing size, control method and voltage. Mating cordsets and brackets can be included for GCC orders.
Facts checked against Banner Engineering's published company profile, October 2026.
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Frequently Asked Questions
What does the RSr-L-SIL-8A-Q do?
It converts OSSD safety outputs from low current 24 V DC to high-current, pulse-free 24 V DC outputs through two 8 A relay outputs.
What is the difference between SIL and SIT models?
The SIL model is latched, with the reset input on the aux wire; the SIT model is a trip version with an aux output on the aux wire.
What safety rating is printed?
Cat. 4 / PL e and SIL 3 with solid-state devices with short-circuit detection, with PFHd of 1.38 x 10^-9 per IEC 61508.
Does it need a control cabinet?
No. It is sealed and rated IP65 and IP67, for indoor use only, so it can be mounted directly on a machine.
How long does the reset pulse have to be?
Between 350 ms and 3000 ms.
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