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Introduction

PRX-20 card reader is a non-contact high performance card 
reader with ABA (14 & 13 char), standard Wiegand 26 bits 
and Wiegand 44 bits output format. These units are mainly 
used as card reading support for access controllers and are 
characterized by their smart and elegant appearance, simple 
wiring and stable performance.

Specifications:

Type of cards 

* Any card of 64bit memory array used by H4001 CMOS 
integrated circuit, by EM Microelectronic-H4100/4102 or 
compatible.

Clock & Data ABA

 (14/13 char), standard Wiegand 26 bits and 

Wiegand 44 bits output format interface, photo coupling seclusion 
OC gate output.

RS-422

 Differencial outputs:

Connection distance

 up to 300m. 

TTL outputs:

 up to 15m.

Note

: In case of reading errors, 1K pullup resistors can be 

added to the Data and Clock outputs (yellow and white 
wires).

Operating state:

 sound-visual state indication

Light Indications

Definition of Wires

Differential 

Output format options

Wiegand Output Format - Further details

D0 and D1 output “0” and “1” respectively.
When outputting “0”, D0 experiences a negative pulse and 
when outputting “1”, D1 experiences a negative pulse.
See the following diagram displaying a negative pulse width 
of TP=100+10 microsecond; with a repetition period of 
TW=1000+100 microsecond and 1 microsecond=1/1000000 
a second.

In the following diagram C and O stand for 0 or 1.

E: even check code; O: odd check code

The three bytes in the middle of CCCC CCCC, CCCC 
CCCC, CCCC CCCC are the swiped badge number, trans-
mitted from left (E) to right in sequence.

Dimensions

Model

Weight

L120x W45x H21 (mm)

PRX-20

300 g 

Power supply

Operating Voltage: DC 5V-12V: Maxi-
mum Current Consumption: 80mA; 

Ambient temperature

Operating temperature: -10C ~ +55C; 
Storage temperature: -10C ~ +60C;

Humidity

Operating: 20%~98%; Storage: 
5%~90%;

Available Output 
format

Standard wiegand 44BIT; ABA Synel (14 
char); ABA Linear (13 char) 

Cable description

10 wires #24 wg (3 m.)

EM card*

 reading distance: 80- 150mm (subject to 
quality of the card)

Yellow light

standby state

green and  red light

card reading status

Model: PRX-20
Indication

Color

Power on

Yellow

Ok indication

Green + 1 beep

activated by 
controller

Error 
indication

Red + 3 beeps

Wires color

Wiring Definition

Red

DC 5V-12V

Black

GND

Yellow

Data0/Data

White

Data1/Clock

Violet

Card Present

Brown

Green LED

Blue

Red LED

Green

Buzzer

Orange

Se1_EX Output Format wire #1

Gray

Se2_EX Output Format wire #2

Wires color

Wiring Definition

Red & Black 

D0+ / Data+  ( RS-422 positive signal level)

White & Black 

D0- / Data-  ( RS-422 negative signal level)

Black & Green 

D1+ / Clock+ ( RS-422 positive signal level)

Black & Yellow

D1- / Clock-  (RS-422 negative signal level)

Se1_EX=1, Se2_EX=1

ABA Synel (14 char)

Se1_EX=0, Se2_EX=1

ABA Linear (13 char)

Se1_EX=0, Se2_EX=0

Std. Wiegand 26bits

Se1_EX=1, Se2_EX=0

Wiegand 44bits

Note:
1

. Se1_EX=1 or Se2_EX=1 is a free wire, not connected to 

any wires.

2

. Se1_EX=0 or Se2_EX=0 is a wire connected with GND.

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