RSe Series Double Valve Safety Category. 4 PL e, External Monitoring

Name: RSe Series Double Valve
Brand: ROSS Controls

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Product Catalog

Integration Guide

Operating Instructions

Redundant control can achieve Category 4, PL e, when used with proper safety controls
Each single valve in the RSe Series is equipped with a PNP proximity sensor for external monitoring.
Monitoring both of these sensors on each actuation and de-actuation of the RSe Series valve provides a diagnostic coverage up to 99
Redundant spool type valve with two operating solenoids that must be operated simultaneously in order to actuate the valve. In addition each valve element has a single, proximity sensor that is wired as a PNP type sensor for position sensing.
Automatic reset by de-energizing the solenoids
Base mounted – with G or NPT pipe threads. Inlet and outlet ports on both sides provide for flexible piping (plugs for unused ports included). Captive valve-to-base mounting screws.
SISTEMA Library available for download

RSe Series Double Valve Product Overview

The 3/2 RSe Series valve is designed to supply air to a zone or entire machine/system until signaled to shut off and exhaust residual downstream pneumatic energy from the machine. Thus, reducing the hazards associated with the presence of residual energy during employee access and/or minor servicing.

The safety function of the 3/2 RSe Series valve is to shut off supply of pneumatic energy and to exhaust any pneumatic energy from downstream of the valve. Note: The 3/2 RSe Series valve cannot exhaust pneumatic energy from downstream of obstructions such as check valves and closed center function valves.The RSe Series valves are designed for external monitoring for safe, redundant operation of the valves.

The RSe Series valves are constructed of redundant, 3/2 spool type valves, and have an overall function of a single solenoid pilot-operated, spring return valve. Each single valve in the RSe Series is equipped with a PNP proximity sensor. Monitoring both of these sensors on each actuation and de-actuation of the RSe Series valve provides a diagnostic coverage of 99%. Monitoring of these sensors is to be done by an external monitoring system.

Please refer to the side and below for links to easily navigate and download ROSS Controls RSe Series Double Valve Catalogs, Installation Instructions, and technical data. Additionally, you have the option to filter through all available options to discover the RSe Series Double Valve variant that meets your requirements.

Series Overview ❯

Product Overview

The ROSS Controls RSe Series is a redundant spool-type safe exhaust double valve that achieves Safety Category 4, Performance Level e (PL e) per ISO 13849-1:2015 through an external monitoring architecture using dual PNP proximity sensors. Each valve element in the RSe Series is equipped with a single PNP proximity sensor that reports actual spool position. Monitoring both sensors on every actuation and de-actuation cycle provides diagnostic coverage up to 99 percent, satisfying Category 4 requirements when the monitoring function is performed by an external safety control system.

The RSe Series uses a redundant spool-and-sleeve construction, a different architecture from the poppet-based DM1, DM2C, and M35 Series. The RSe consists of two individual 5/2 single-solenoid spool valves, each with its own proximity sensor. Both solenoids must be operated simultaneously for the valve to actuate from the safe (de-energized) to the supply state. This dual solenoid requirement means that a single solenoid failure cannot cause the valve to supply air unintentionally, preserving the safety function.

Automatic reset is standard on the RSe Series: de-energizing both solenoids returns the valve to the safe (exhaust) condition. This makes the RSe suitable for applications where the control system architecture handles safety state management and where operator-acknowledged reset is not required at the valve level.

Beyond standard safe exhaust, the RSe Series supports additional safety application modes. Safe Return Dual Pressure applications use the RSe to extend a cylinder with supply pressure at port 3 and retract with supply pressure at port 5, providing controlled bi-directional cylinder motion as part of a safety-rated circuit. Safe Pressure Select applications use the RSe to safely control the pressure applied to a machine operation, selecting between two pressure levels as part of a safety function.

The RSe is available in three base sizes: 1/8 inch, 1/4 inch, and 1/2 inch port sizes, with flow capacities ranging from 0.9 Cv (886 Nl/min) for the 1/8 inch size to 3.06 Cv (3,011 Nl/min) for the 1/2 inch size. The base-mounted design accommodates flexible piping with ports on both sides and includes captive valve-to-base mounting screws. SISTEMA Library files are available for download.

Key Engineering Features

Safety Category 4, PL e (ISO 13849-1:2015) via External Monitoring - Achieves Category 4, PL e through external safety PLC or safety relay monitoring of both PNP proximity sensors on every actuation and de-actuation cycle.
Dual PNP Proximity Sensors (99% Diagnostic Coverage) - One PNP proximity sensor per valve element reports actual spool position. Monitoring both sensors on every cycle provides up to 99% DC, detecting valve element faults before they can compromise the safety function.
Redundant Spool-Type Architecture - Two individual 5/2 spool valves operating in tandem. Both solenoids must actuate simultaneously for air supply. De-energizing both solenoids exhausts downstream pressure, with automatic reset to safe state.
Dual 5/2 Valve Function with Multiple Safety Modes - Beyond safe exhaust, the RSe supports Safe Return Dual Pressure (controlled bi-directional cylinder control) and Safe Pressure Select (dual-pressure selection) safety application architectures.
Automatic Reset - De-energizing both solenoids returns the valve to the safe exhaust condition automatically, without manual intervention.
Spool-and-Sleeve Construction - Precision spool-and-sleeve valve elements provide reliable performance in clean, filtered compressed air service with standard industrial air quality.
Base Mount with Flexible Porting - Base-mounted valve with ports on both sides (plugs for unused ports included) and captive mounting screws for field valve replacement without disturbing piping.
Multiple Port Sizes (1/8" to 1/2") - Three base sizes accommodate flow requirements from 0.9 Cv (886 Nl/min) for small-bore cylinder circuits through 3.06 Cv (3,011 Nl/min) for larger actuator applications.
M8 Sensor Connector - PNP proximity sensors use M8 connectors for compact, reliable wiring to the safety controller's sensor inputs.
SISTEMA Library Support - Downloadable SISTEMA Library files for ISO 13849-1 Category 4, PL e documentation.

Technical Specifications

General Specifications

Parameter	Specification
Safety Category	Category 4
Performance Level	PL e per ISO 13849-1:2015
Monitoring Type	External (PNP proximity sensors monitored by external safety control system)
Diagnostic Coverage	Up to 99% (monitoring both PNP sensors on each actuation and de-actuation)
Reset Type	Automatic (de-energize both solenoids)
Valve Function	Dual 5/2 single solenoid
Construction	Spool and sleeve
Actuation	Electrical (solenoid), 24 VDC
Voltage	24 VDC
Solenoid Connection	EN 175301-803 Form C
Status Indicator	PNP proximity sensors
Sensor Connection	M8 connector
Mounting	Base mount
Thread Types	NPT and G (BSPP)
Ambient Temperature	40 to 120 F (4 to 50 C)

Certifications & Compliance

Certification/Standard	Detail
Safety Category / PL	Category 4, PL e per ISO 13849-1:2015 when both PNP sensors are monitored by external safety control system.
Diagnostic Coverage	Up to 99% DC achieved by monitoring both PNP proximity sensors on each actuation and de-actuation.
CE Marking	CE marked per EU Machinery Directive 2006/42/EC.
SISTEMA Library	Downloadable SISTEMA Library files for ISO 13849-1 Category 4, PL e documentation.

Typical Applications & Industries

Pneumatic Cylinder Safety Control

Safe exhaust applications for small-bore to medium-bore cylinder circuits where the RSe de-energizes downstream actuators on safety controller command, with both PNP sensors confirming valve state to the safety PLC.
Safe Return Dual Pressure applications: the RSe controls cylinder extension using supply pressure at port 3 and retraction using supply pressure at port 5, enabling bidirectional cylinder safety control in a single valve.
Safe Pressure Select applications: the RSe selects between two supply pressure levels under safety PLC control, enabling applications such as low-force clamp during loading and high-force clamp during machining with a single safety-rated valve.

Automotive Assembly and Testing

Compact pneumatic actuator circuits in automotive assembly jigs, test fixtures, and gaging systems where space constraints favor the RSe's compact footprint and base-mount design.
Engine and transmission component test stands with multiple small-bore pneumatic actuators requiring individual zone safe exhaust with Category 4 documentation.
Vehicle safety system component test equipment where the RSe's dual 5/2 function enables bidirectional cylinder control with safety-rated position sensing on both valve elements.

Electronics and Semiconductor Manufacturing

Semiconductor wafer handling and chip packaging equipment where small-bore, high-precision pneumatic actuators are controlled by RSe valves with PNP sensor feedback to the machine safety system.
PCB assembly and SMT equipment where compact pneumatic actuators for part fixturing and conveyor control are isolated and de-energized by RSe valves during guard-open access events.
Flat panel display manufacturing with cleanroom-compatible pneumatic actuator circuits where the RSe's compact size and external monitoring architecture align with clean room machine safety requirements.

Medical Device and Laboratory Equipment

Medical device assembly automation where Category 4 pneumatic energy isolation documentation is required for regulatory compliance, and the RSe's compact size suits the smaller actuators typical of precision assembly equipment.
Pharmaceutical dispensing and packaging machines with pneumatic actuators requiring monitored safe exhaust with dual-channel verification for GMP-regulated applications.

Food Processing and Packaging

Compact pneumatic actuator circuits on filling, sealing, and labeling machines where the RSe's base mount and dual sensor feedback support safety system integration with the machine's safety PLC.
Robotic gripper and pick-and-place systems in food packaging where safe exhaust with Category 4 documentation is required for personnel access during jam clearance or format change.

General Industrial and OEM

OEM machine designs with small-bore pneumatic circuits requiring Category 4, PL e safe exhaust documentation for CE marking, where the RSe's compact dimensions minimize machine footprint impact.
Any application requiring Safe Pressure Select or Safe Return Dual Pressure as a safety-rated function, which the RSe supports in addition to standard safe exhaust, making it a versatile platform for complex pneumatic safety architectures.

Ordering and Model Number Configuration

The RSe Series model number encodes the base size, valve function, thread type, voltage, and sensor configuration. Examples: RSe6EDA10A31P (1/8" base, G thread); RSe6ENB20A31P (1/4" base, NPT thread); RSe6EDB40A31P (1/2" base, G thread). Contact ROSS Controls for the complete configurator.

RSe Series Model Number Structure:

RSe Series designation

6 Function code (6 = Dual 5/2 single solenoid)

E External monitoring (E = PNP proximity sensor equipped)

N/D Thread type (N = NPT; D/B = G/BSPP)

Size Base size code (10 = 1/8"; 20 = 1/4"; 40 = 1/2")

A31P Electrical configuration and sensor type code

Standard voltage: 24 VDC.

Solenoid connection: EN 175301-803 Form C.

PNP proximity sensors standard. Sensor connection: M8 connector.

NPT and G (BSPP) thread options available.

Base sizes: 1/8", 1/4", 1/2" (three sizes available).

Ports on both sides; plugs for unused ports included.

Specify Safe Exhaust, Safe Return Dual Pressure, or Safe Pressure Select application mode when ordering or seeking application engineering support.

SISTEMA Library files downloadable at rosscontrols.com.

Contact ROSS Controls at (800) 438-7677 for full configurator and application engineering support.

Accessories

Upstream FRL and Lockout L-O-X Valves

ROSS MD Series filter-regulator-lubricator units and Lockout L-O-X valves for upstream air preparation and manual energy isolation in conjunction with the RSe.

M8 Sensor Cable Assemblies

Pre-terminated M8 sensor cables for PNP proximity sensor wiring to safety PLC inputs.

DIN EN 175301-803 Form C Connector Kits

Solenoid electrical connectors for RSe solenoid wiring, available in standard and sealed configurations.

Frequently Asked Questions (FAQ)

Q: What safety performance does the RSe Series achieve?

A: The RSe Series achieves Safety Category 4, Performance Level e (PL e) per ISO 13849-1:2015 when both PNP proximity sensors are monitored by an external safety control system on each actuation and de-actuation cycle. Monitoring both sensors provides diagnostic coverage up to 99 percent.

Q: How does PNP proximity sensor monitoring provide 99% DC?

A: Each valve element has one PNP proximity sensor that reports actual spool position. By monitoring both sensors on every valve cycle, the external safety controller can detect valve element faults such as a spool stuck in the energized (supply) position when the solenoid has been de-energized. This bi-directional monitoring of both elements on every cycle achieves up to 99 percent diagnostic coverage per ISO 13849-1.

Q: What is the difference between the RSe and the M35 or DM1/DM2C?

A: The RSe uses spool-and-sleeve construction versus the poppet design of the M35, DM1, and DM2C. The RSe also uses PNP proximity sensors for spool position sensing (external monitoring) versus the pressure sensors in the M35. The RSe supports dual 5/2 valve function enabling Safe Return Dual Pressure and Safe Pressure Select modes in addition to standard safe exhaust, which the single-sided 3/2 poppet valves do not provide. The RSe is available in smaller port sizes (1/8" to 1/2") compared to the M35 (1/2" to 3/4") and the DM1/DM2C (up to 2-1/2" exhaust).

Q: What is Safe Return Dual Pressure and when is it used?

A: Safe Return Dual Pressure is an application where the RSe is configured to extend a cylinder with supply pressure at port 3 and retract the cylinder with a separate supply pressure at port 5. This provides safety-rated bidirectional cylinder control in a single valve assembly. It is used in applications such as safety-rated clamping functions where the extend (clamp) and retract (release) motions both require a safety-rated control valve.

Q: What is Safe Pressure Select and when is it used?

A: Safe Pressure Select is an application where the RSe selects between two pressure levels under safety PLC control. For example, a low pressure level for operator-accessible loading and a high pressure level for automated machining or forming. The safety function ensures that high pressure cannot be applied while the guard is open. The RSe provides the safety-rated pressure selection valve in this architecture.

Q: What are the available port sizes and flow capacities?

A: Three base sizes: 1/8 inch (0.9 Cv / 886 Nl/min supply), 1/4 inch (1.09 Cv / 1,073 Nl/min supply), and 1/2 inch (3.06 Cv / 3,011 Nl/min supply). Exhaust flow capacities are lower: 0.68 Cv (1/8"), 0.91 Cv (1/4"), 1.95 Cv (1/2").

Q: What is the reset behavior of the RSe?

A: The RSe uses automatic reset: de-energizing both solenoids returns the valve to the safe exhaust condition. There is no manual reset requirement. This contrasts with the DM2C's latching manual reset.

Q: What solenoid and sensor connections are used?

A: Solenoid connections: EN 175301-803 Form C. PNP proximity sensor connections: M8 connector. Both use industry-standard connectors for reliable field wiring.

Q: Can the RSe be used in NPT and G thread configurations?

A: Yes. Both NPT and G (BSPP) thread options are available across all three base sizes.

Q: Is a SISTEMA Library available?

A: Yes. A downloadable SISTEMA Library file for the RSe Series is available at rosscontrols.com.

Q: What temperature range does the RSe support?

A: Ambient temperature: 40 to 120 F (4 to 50 C). For the 1/8 inch body (RSe6EDA10A31P), media temperature range is 40 to 120 F (4 to 50 C). Verify media temperature requirements against the specific variant specification.

Q: What are the air quality requirements for the RSe?

A: The RSe requires compressed, filtered air per ISO 8573-1 Class 7:4:4. Spool-and-sleeve valves are more sensitive to particulate contamination than poppet valves, making 5-micron upstream filtration and clean air supply especially important for RSe reliability and service life.

Installation & Maintenance Guidelines

Mount the RSe base and connect all field piping before installing the valve body. Captive screws secure the valve to the base.
Connect supply to one inlet port. Plug unused inlet port with the included plug. Connect machine circuit to outlet port. Plug unused outlet port.
For Safe Return Dual Pressure applications, connect the extension supply to port 3 and the retraction supply to port 5 as specified in the application diagram.
Wire both EN 175301-803 Form C solenoid connectors to the safety controller outputs. Both solenoids must be simultaneously energized to actuate and simultaneously de-energized to exhaust.
Wire both M8 PNP proximity sensor connectors to the safety controller's dual-channel sensor inputs. Configure the controller to monitor both sensor states on every cycle.
Program the safety controller to initiate a safety stop if either sensor fails to report the expected state within the response window on any cycle.
Supply filtered compressed air per ISO 8573-1 Class 7:4:4. 5-micron upstream filtration is critical for spool-type valves.
Verify operating pressure is within range. The RSe operating pressure max is 145 psi (10 bar) per the 1/8 inch body datasheet; verify against specific configuration.
Perform commissioning test: simultaneous energization of both solenoids, verify supply state and sensor feedback; simultaneous de-energization, verify exhaust state and sensor feedback.
Document commissioning results and SISTEMA calculations. Establish periodic proof test schedule per ISO 13849-1 requirements.

Warranty & Global Support

ROSS Controls provides a one-year warranty on all products, covering defects in material and workmanship from date of purchase.

Technical support: 1-888-TEK-ROSS (1-888-835-7677). Customer service: 1-800-GET-ROSS (1-800-438-7677).

Global support through ROSS offices in the USA (Ferndale, Michigan), Canada, Germany, France, United Kingdom, Brazil, India, China, and Japan.

SISTEMA Library files, dimensional drawings, CAD models, and certifications available at rosscontrols.com.

Download Catalog: https://www.rosscontrols.com/en/series/1297-rse-series-double-valve