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This Quick Start Guide is intended for experienced installing technicians. It is a basic reference to ensure all connections are properly 
made. Models include EM-30-OSDP, EM-50-OSDP, and EM-64-OSDP. For additional information please reference Farpointe Data’s 
website, www.farpointedata.com.

1.0 Introduction

A key component of a physical security electronic access control 
system, a proximity card reader is based on RFID technology. In 
operation it is capable of reading data stored on a proximity credential 
via radio frequency and without physical contact, and then passing the 
data obtained to the physical access control system. Access control 
systems typically manage and record the movement of individuals 
through a protected area, such as a locked door.

2.0 Mounting Provisions

Each reader may be installed either indoors or outdoors. Mounting 
options shown in the table below. Use supplied #6 mounting screws, 
or equivalent security screws, for installation.

Model

Mullion Mount

Single-Gang Wall Mount*

EM-30-OSDP

EM-50-OSDP

EM-64-OSDP

*

Plastic or metal.

3.0 Cable Requirements

Cable, 4 conductor, 22 or 24 AWG [65 mm or 51 mm] twisted pair, 
over-all shield and UL approved (Belden 8723, or equivalent).
Maximum bus length: 4,000 ft – 24 AWG (1,219 m)
Maximum distance between: 1,640 ft – 24 AWG (500 m)

4.0 Reader Wiring

OSDP

Twisted Pair

Conductor

Function

Pair 1

Red

DC (5-16 VDC)

Black

Ground

Pair 2

Green

RS-485 T/R+

White

RS-485 T/R-

5.0 Output Formats

The SIA standard OSDP protocol is supported for clear and secure 
channel communication.
Default Address: 0
Default Baud rate: 9600bps (bits per second)
Default Secure Channel Key: 
SCBK_D = 0x303132333435363738393A3B3C3D3E3F.

OSDP Protocol Technical Support:
SIA OSDP Application Profile: Basic Reader (OSDP v2.2 and higher)

6.0 Grounding

Shield (drain) continuity must run from the reader to the access panel. 
Shield (drain) and reader ground must be tied together at the access 
panel and connect to an earth ground at one point.

7.0 Power

Reader may be powered by the access panel. A linear power supply is 
recommended for best operation.

8.0 Voltage and Current

Voltage: 5 to 16 VDC
Current Draw: 70mA to 120mA

9.0 Read Mode

Reader (OSDP “PD”) operation is controlled by the access panel 
(OSDP “ACU”) per the OSDP specification.

10.0 Connection

Connection must be done in accordance with NFPA 70. Do not 
connect to a receptacle controlled by a switch. Connect to a power 
limited DC voltage source.

11.0 Troubleshooting

1.  When the reader is first powered on it will beep 4-times.
2.  Presenting a supported access credential will result in the  

reader beeping once.

3.  OSDP communications with the panel will be established after the 

reader has completed its start-up sequence. The panel can query 
the reader for status using OSDP commands. Note, at this point, 
the access panel controls the reader beeper and LED functionality.

If the reader does not recognize the card or tag (no beep, no LED 
flash), refer to possibe OSDP communications errors detected at the 
access control panel. Please see the following table for additional 
possible causes and solutions.

See additional troubleshooting information on reverse.

QUICK START GUIDE

125-kHz EM PROXIMITY CARD READERS 

WITH OSDP SUPPORT

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