OMNIKEY® 3121 USB 
Dimensions 
3.15" x 2.64" x .1.1" (80 x 67 x 28 mm) 
Mounting Options with Standard Standing Base 
Includes adhesive attachment pad and vertical mounting option 
Weight 
Reader only: approx. 3.88 oz (110 g) Reader with standard standing base: approx. 4.97 oz (141 g) 
Base Options 
Heavy standing base (vertical and horizontal card insertion): available on request (approx. 3.46 oz / 98 g) 
Jumbo standing base (vertical and horizontal card insertion): available on request (approx. 15.34 oz / 435 g) 
Power Supply 
Bus powered 
Operating Temperature 
32–131° F (0–55° C) 
Operating Humidity 
10–90% rH 
Host Interface 
USB 2.0 CCID1 (also compliant with USB 1.1) 
Transmission Speed 
12 Mbps (USB 2.0 full speed) 
Standards 
ISO 7816 & EMV2 2000 Level 
Protocols 
T=0, T=1, 2-wire: SLE 4432/42 (S=10); 
3-wire: SLE 4418/28 (S=9), I2C (S=8) 
Card Size 
ID-1 (full size) 
Smart Card Interface Speed 
420 Kbps (when supported by card) 
Smart Card Clock Frequency 
Up to 8 MHz 
Supported Card Types 
5V, 3V and 1.8V Smart Cards, ISO 7816 Class A, B and C 
Power to Smart Card 
60 mA 
Smart Card Detection 
Movement detection with auto power-off / Automatic detection of smart card type / Short circuit and thermal protection 
8-Pin Handling 
C4 / C8 supported 
Supported APIs 
PC / SC driver (ready for 2.01), CT-API (on top of PC / SC), Synchronous-API (on top of PC / SC), OCF (on top of PC / SC) 
PC / SC Driver Support 
Windows® XP/Vista/7/8 (32 bit / 64 bit) Windows Server 2003/2008 (32 bit / 64 bit), 2008R2 (64 bit) Windows CE 4.2/5/6/7 (depending on hardware) Linux®, Mac® OS X and Android™ 
Embedded Technology 
OMNIKEY® Smart@Link Chipset 
Status Indicator 
Chipset Status Indicator D 
Reader Board 
Also available as PCB 
Color 
Two-tone gray 
Options 
Customer-specific logo, label and colors: available upon request 
Connector Cable 
70.9" (180 cm) 
Durability 
100,000 insertions (200,000 insertions with Landing Contacts version) 
Meantime Between Failure (MTBF) 
500,000 hours 
Compliance / Certification 
Microsoft® WHQL³, EMV² 2000 Level 1, ISO 7816, HBCI4 , USB 2.0 (USB 1.1 compatible), CCID1 , GSA FIPS 201 approved product list 
Safety / Environmental 
CE, WEEE, FCC, UL, VCCI, MIC, RoHS 
Warranty 
Two-year manufacturer’s warranty. 
(For drivers, see complete lifetime support policy.) 
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