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Indala Proximity Reader | FlexPass Mullion

Supplier: Chase Security Solutions

Indala Proximity Reader, FlexPass Mullion formally known as the“ASR-503 SlimLine”, is a member of Indala’s proximity card and reader family.

Price Guide: POA

Indala Proximity Reader | FlexPass Mullion

The Legacy Mullion proximity reader, formally known as the “ASR-503 SlimLine”, is a member of Indala’s proximity card and reader family. Designed to mount on metal door frame (mullion) or a flat surface, it is also suitable for locations that require a small footprint reader.

The single-piece Legacy Mullion Reader delivers read ranges up to 4 inches (10 cm) and operates from 4 to 16 VDC allowing for great flexibility in power supplies. In most cases, it can be powered directly from the access control panel. The electronics are sealed in a UL-approved epoxy potting material,making the reader vandal and weather resistant.

The Legacy Mullion Reader can be configured to output data in either Wiegand or magnetic stripe formats, making it easy to upgrade existing sites to proximity using the wiring already in place. Additionally, the Legacy Mullion Reader includes all of the advanced performance features that have made Indala so popular.

These features include QuickFlash for immediate user feedback, SelfTest for installation assistance, and WatchDog for higher security applications requiring a supervised reader, audio tone and tri-colour status LED. All performance features are field-configurable via the use of feature option cards.

Specifications of Indala Proximity Reader FlexPass Mullion

  • Size:
    • 5.5”H x 1.7”W x 0.7”T (14.0 cm x 4.3 cm x 1.7 cm)
  • Read Range:
    • Up to 4” (10 cm) using FlexCard™ standard card
  • Input Voltage:
    • 4-16 VDC at reader
  • Current Draw:
  • Off Metal:
    • 65 mA @ 12 VDC
    • 85 mA @ 5 VDC
  • On Metal:
    • 76 mA @ 12 VDC
    • 96 mA @ 5 VDC
  • Maximum:
    • 88 mA @ 12 VDC
    • 100 mA @ 5 VDC
  • Operating Temperature:
    • -31°F to +149°F (-35°C to +65°C)
  • LED Indicator:
    • Tri-colour standard (red, green, amber)
  • Audio Tone:
    • Standard, independently controllable (not tied to LED function)
  • Output Formats:
    • Wiegand, ABA Track II Magnetic Stripe
  • Frequency:
    • 125 kHz (excitation)
  • Read Time (26 bit):
    • 200 ms (from read to data output)
  • Security:
    • Various levels (configurable), FlexSecur
  • Programming:
    • Factory only (field programmability not available)
  • Other Features:
    • SelfTest, QuickFlash, and WatchDog
  • Part Number:
    • ASR-503


UL294/cUL, FCC Certification - United States, Canada Certification, CE Mark-Europe, Australia C-Tick,New Zealand/EMC


Indala warrants this product against defects in material and workmanship under normal use and service. The warranty period commences with the date of shipment. See complete warranty statement for further details.

Read range stated when readers installed according to instructions. Read range may vary when mounted on metal. Specifications subject to change without notice. Indala reserves the right to discontinue any product without notice.