ISQB1 ELECTRO-PNEUMATIC CONTROL VALVE • • • • • • FM approved for CLASS 1 DIV 1 areas Pressure ranges from full vacuum through 150psig NEMA4/IP65 housing No bleed design Not sensitive to mounting position or vibration Use with air piloted regulators for high flow FUNCTIONAL DESCRIPTION The ISQB1 series control valve is an electronic pressure regulator designed to precisely and proportionally control the pressure of gaseous media based on an electronic control signal. The ISQB1 operates using two normally closed solenoid valves, a pressure sensor, and a control circuit. One valve is actuated to allow supply media into the system. The second valve is actuated to allow working media to vent through a threaded port to atmosphere. The pressure sensor provides feedback to the control circuit. The control circuit compares the pressure sensor feedback to the user supplied electronic command signal and actuates the appropriate valve until the two signals match. The ISQB1 series can be teamed with a variety of air piloted pressure volume boosters for even greater flow. GENERAL SPECIFICATIONS ELECTRICAL Supply Voltage….………….…..14.5VDC-29VDC (MAX) Supply Current…………………<80mA Command Signal.………………4-20mA Differential Command Signal Impedance…..100 OHM PHYSICAL Operating temperature…..…..…32-150ºF (0-70ºC) (T4) Weight………………………….2.5 lb. (1.1 kg) Protection Rating……………….NEMA 4 Housing…………………………Anodized Aluminum See Installation & Maintenance Guide ISBQ1-MS1 for proper installation. HAZARDOUS AREA CLASSIFICATION Intrinsically Safe……...Factory Mutual Approval- Class I, II, III, Division 1Groups C,D,E,F,G Entity Parameters……..V Max = 29VDC I Max = 150mA Ci = 0.24uF Li = 0 Field Wiring Drawing: ISQB-96026-2 BRISQB 07/12/07 DC

DIMENSIONS MOUNTING BRACKET (QBT-01) INTRINSICALLY SAFE SERIES * Vacuum only not available. Vacuum through positive pressure range units must have positive pressure range equal to or greater than the vacuum range. MAX. CALIBRATED PRESSURE Ranges Available VAC-150 PSIG* EXAMPLES 100 = 0-100 PSI 005 = 0-5 PSI S108 SPECIAL OPTIONS S108 = Board Mod. S38 = Calibrate 3-15 PSI Consult Factory for Available Options PROPORTION-AIR, INC. BOX 218 MCCORDSVILLE, IN USA 46055 PHONE: (317)335-2602 FAX: (317)335-3853 web site: www.proportionair.com email address: [email protected] BRISQB 07/12/07 DC