UMD Model 528A
UMD VAST™ Slimline Validator

The UMD Model 528 (M528) Slimline Validator is part of the UMD VAST™ lineup of Validators used for scanning tickets or NFC tags to enable patron entry to venues or attractions.

The Validator is cloud-connected to the UMD VAST™ access control and ticketing system and optionally controls ingress and egress via a connected turnstile, gate or other physical barriers.

The M528 Slimline Validator can be integrated with almost any barrier system and uses solid-state relay outputs for activation of the barrier.†

The Slimline Validator allows patrons to scan their ticket barcode or tap their NFC passes to gain entry to the venue or to record their presence at the venue via the UMD VAST™ cloud service.

Mounting of the M528 is to a wall or bollard, adjacent to the venue entry and requires power and a wired LAN connection to operate. This design allows easy access for installation and maintenance.


  • Linux based microcontroller for fast and flexible applications.
  • Standard UMD VAST™ Validator software pre-installed
  • LAN connected for reliable communications with the host ticketing service
  • Remote monitored/managed via the UMD VAST™ web console interface
  • Rugged 316 Grade Stainless Steel enclosure ensures longevity and serviceability in exposed environments‡
  • Fast and aggressive presentation style barcode scanner for reading 1D or 2D barcodes on paper or mobile devices
  • NFC Mifare 1k compatible tag reader for contactless membership cards or NFC wristbands
  • Multifunction, multicolour LED indicator to show successful scan, rejected scan, system error or other programmed conditions such as concession tickets using different colours.
  • Online business hours support is included where you purchase an ongoing UMD VAST™ device access licence subscription.
  • 12 Months Warranty


Overall Dimensions 103 W x 381 H x 95 D (mm) Including LED Indicator Dome
Housing Only 103 W x 343 H x 95 D (mm)
Wall/Post Mount Plate 103 W x 343 H (mm)
Material 316 Grade 0.9 mm Stainless Steel
Finish Brushed Natural Finish ("Linish")
Environmental IP54 (Estimated)
Ambient Operating Temperature 0°C - 40°C
Processor Linux Computer (UMD M800 Series)
Communications Wired Ethernet
I/O 4 x USB
1 x RS232 for NFC Reader
5 x Solid State Relay Outputs (60V/0.2A, 3 for LED Accunciator, 1 for Turnstile release, 1 for freewheel output)
2 x Opto-isolated Inputs (1 for rotate input, 1 for lane busy input)
Power Supply Requirement 9 to 36VDC / 4 A or PoE (802.3af)
User Interface
Annunciator RGB LED dome
Audio Buzzer
Access Cam Lock
†RS232 and Weigand are under development
‡Not suitable for full outdoor installation


Ordering Information and Pricing
Part Number Model Number Description RRP
[A] UMD Model 528A Slimline Validator
M528A01E01V1 M528A-1EE UMD Slimline Post or Wallmount Series Wallmount Turnstile Validator, 1 Way, RGB Dome Annunciator, Ethernet with UMD VAST™ Validator Software In Enclosure