Ultrasonic proximity sensor RPS-409A-IS3

cylindricalM30M12

Overview The RPS-409A-IS3 is an intrinsically safe analog ultrasonic sensor available in multiple sensing ranges. It is intended for use in hazardous gas or dust environments (Class I, II, III) when installed with approved intrinsic safety barrier(s). The sensor is housed in a 30 mm barrel-style PVC enclosure and is designed for integration with PLCs and analog input cards. The RPS-409A-IS3 provides a short-circuit protected 0–10 Vdc analog output scaled to the unit's maximum range. Built-in temperature compensation, an LED target indicator, and a Sync/Tx line for multi-sensor synchronization or transmit control are included.

Features

• Intrinsically safe design for hazardous locations
• C-UL-US certified (UL/cUL File # E226209)
• Designed for long sensor service life (20+ years expected)
• Stock availability and fast delivery options
• LED target indicator (green = no target; red = target detected)
• Available in multiple sensing ranges and model variants
• Analog 0–10 V output, short-circuit protected
• Temperature compensation for consistent readings across operating temperature
• Fully sealed PVC enclosure with PVC sensing face; use IP67 or greater rated cable for connection
• Wide operating temperature range
• Sync/Tx input to prevent cross-talk or control transmit timing in multi-sensor setups

Functional description The analog voltage output is linear and scaled as volts per inch based on the selected model range (example: RPS-409A-80-IS3 = 0.125 V per inch; target at 10 in → 1.25 V; at 80 in → 10 V). The sensor is powered from 16–30 VDC with reverse polarity protection (note: a minimum of 24 VDC must be applied to the intrinsic safety barrier). Input current and output loading constraints apply for intrinsic safety installations. The Sync/Tx line enables synchronization of multiple sensors to avoid cross-talk or to control transmit timing for advanced installations.

Technical specifications

• Enclosure material: Polyvinyl Chloride (PVC) with PVC sensing face
• Ambient temperature: -40 to +60°C (-40 to +140°F)
• Input current: 24 mA maximum with 24 VDC applied to the safety barrier
• Humidity: 0–95% non-condensing
• Power input: 16–30 VDC, reverse polarity protected (Note: minimum 24 VDC required at safety barrier)
• Output: Analog voltage 0–10 V (load 100 kΩ to infinity); short-circuit protected
• Entity parameters: See control drawing for intrinsic safety entity parameters
• Model variants and key specs (Model | Range | Transducer Frequency | Response Time | Volts per Inch):
  RPS-409A-40-IS3 | 4–40" | 175 kHz | 85 ms | 0.250 V
  RPS-409A-80-IS3 | 6–80" | 135 kHz | 85 ms | 0.125 V
  RPS-409A-144-IS3 | 10–144" | 70 kHz | 175 ms | 0.069 V
  RPS-409A-216-IS3 | 12–216" | 70 kHz | 175 ms | 0.046 V
• Explosion protection and approvals: Canada and USA (C-UL-US), UL/cUL File # E226209; suitable for Class I (Groups A,B,C,D), Class II (Groups E,F,G) and Class III hazardous locations when installed per approved intrinsic safety barriers and control drawing
• Connection: Sensor sealed; connection must be made with IP67 or greater rated cable (M12 4-pin cables available separately)
• Accessories and ordering items: M12 cables (various lengths), ZSB-409A safety barrier, DIN rail grounding block, digital meter PD6000 (sold separately)