DM2
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PRODUCT DATA SHEET INFORMATION M DM2® Series C Modular Double Valve with Integrated Soft Start Control Reliable Energy Isolation Port Size 3/4 FEATURES: • Proven ROSS DM2® technology with integrated soft start • Soft start application of air to the system when energized; can be adjusted for slower or faster buildup of system pressure • Rapid exhaust of downstream air when de-energized to remove stored energy and allow safe access • Modular mounting for flexible configured air entry system assembly; order a single part number to meet your specific application requirements • Dynamic Monitoring With Memory: Memory, monitoring, and air flow control functions are integrated into two identical valve elements. Valves lock-out if asynchronous movement of valve elements occurs during actuation or de-actuation, resulting in a residual outlet pressure of less than 1% of supply. • An action is required for reset: Cannot be reset by removing and re-applying supply pressure. Reset can be accomplished by the integrated electrical (solenoid) reset or by the manual reset button. • Basic 3/2 Normally Closed Valve Function: Dirt tolerant, wear compensating poppet design for quick response and high flow capacity. PTFE back-up rings on pistons to enhance valve endurance – operates with or without inline lubrication. • LED Indication: Light-emitting diode (LED) indicators of main solenoid operation, reset solenoid operation, and status indicator condition. • Status Indicator: Includes a pressure switch with both normally open (NO) and normally closed (NC) contacts to provide status feedback to the control system indicating whether the valve is in the lockout or ready-to-run condition. • Transducer (optional): For monitoring of downstream pressure in the system. • Silencers: All models include high flow, clog resistant silencers. Valve Size Model Number* Port Size Category 4 Performance Level e (certification pending) U.S. Patent No. 6840258, 6840259 (Worldwide Patents Pending) Simplified Schematic * NPT port threads. For BSPP threads , replace “N” in the model number with a “D”, e.g., MDM2CDA55A21. Mounting brackets are required to install valve in the system, please see accessories, page 3 for ordering information. Standard Specifications Pilot Solenoids: According to VDE 0580. Enclosure rating according to DIN 400 50 IP 65. Connector socket according to DIN 43650 Form A. Three solenoids, rated for continuous duty. Standard Voltages: 24 volts DC. Power Consumption (each solenoid): For primary and reset solenoids: 1.2 watts on DC. Enclosure Rating: IP65, IEC 60529. Electrical connection: M12, 5 Pin. Ambient Temperature: 15° to 122°F (-10° to 50°C). Media Temperature: 40° to 175°F (4° to 80°C). Flow Media: Filtered, lubricated or unlubricated (mineral oils according to DIN 51519, viscosity classes 32-46); 5-micron recommended. Inlet Pressure: 30 to 150 psig (2 to 10 bar). Pressure Switch (Status Indicator) Rating: 5 amps at 30 volts DC. Monitoring: Dynamically, cyclically, internally during each actuating and de-actuating movement. Monitoring function has memory and requires an overt act to reset unit after lockout. Mounting orientation: Vertically with pilot solenoids on top. Port Threads: NPT, BSPP. Product data for Sistema Library users, pending. APPLICATIONS: Category 4 applications - e.g., Air Dump/Release. ROSS CONTROLS®

Modular Double Valve with Integrated Soft Start Operation Overview Valve de-actuated (ready-to-run): The flow of inlet air pressure to the inlet chamber of the main valve internals is restricted by a fixed orifice and an adjustable flow control as well as an air piloted 2-way normally closed poppet valve. The flow of inlet air pressure into the crossover passages is restricted by the size of the passage between the stem and the valve body opening. Flow is sufficient to quickly pressurize pilot supply/timing chambers A and B. The inlet poppets prevent air flow from crossover passages into...

5 Pin “A” Code Female Connector BROWN WHITE (+24 Volts DC) (N.O. Status Contact) Valve Wiring BLACK (N.C. Status Contact) GRAY (Equip. Ground) BLUE (Common) M DM2® Series C Valve Schematic 5 Pin “A” Code Male Connector BROWN (+24 Volts DC) GRAY (Reset) Pressure Switch Digital Pressure Transducer Precision digital pressure transducer with 5 pin female connection • Two PNP digital outputs which may be set individually, 4-20 mA analog output • Three operation modes: Easy, Window and Hysteresis • Selectable response times to eliminate output chattering • Powered by 12-24 vots DC Input Digital •...

Air Entry Packages with Control Reliable Energy Isolation Category 4 with Manual L-O-X® and M DM2® Series C Double Valve with Integrated Soft Start Pneumatic Energy Isolation (LOTO) • Pre-engineered panel mountable design with air entry via a filter and regulator “FR”, or filter, regulator and lubricator “FRL” • Includes M DM2® Series C Double Valve with Monitoring & Memory: a) Self-contained dynamic monitoring system requires no further valve monitoring controls, b) Dynamic memory of abnormal function prevents unintentional reset with removal of air or electricity • All necessary features...