User Manual
SCR331-DI OEM Integration Manual
Version 1.2
SCR331-DI OEM Integration Manual v1.2
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SCOPE
The scope of this document is to explain the fine points of integrating the SCM
SCR331-DI Rev 2.1b dual interface reader modules into other devices.
MOUNTING
It is recommended that the module is mounted so that the antenna is parallel to the card
placement position on the enclosure. The antenna area of the board has mounting holes.
It is recommended to use nylon (non-metallic) screws in these mounting holes. It is also
recommended that there is no metal in proximity of the antenna to ensure that signal
strength is not degraded.
CABLES & CONNECTORS
The board has four external connectors: one host USB header and three connectors for
the optional smart card reader. The USB host connector can be found under the shield.
The five pin header connects pins #1 thru #4 of the smart card connector while the four
pin header connects pins #5 thru #8 of the smart card connector. The two pin header is
connected to the card detect switch of the smart card connector. It is recommended that
none of the cables pass over the antenna region.
SCR331-DI OEM Integration Manual v1.2
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LABELING
If the module is integrated in such a way that the label is not visible outside, then the
integrator has to display a exterior label referring to the enclosed module. The exterior
label can use wording such as the following: “Contains Transmitter Module FCC ID:
MBPSCR331-DI21B” or “Contains FCC ID: MBPSCR331-DI21B”. Any similar
wording that expresses the same meaning may be used.
TROUBLE SHOOTING
1. Unit does not power up
Check to ensure that the host USB cable is plugged in at proper orientation.
2. Host displays message that device is asking for more power
The device draws power from the host through the USB connector. The
maximum power draw is 150mA at 5V. So the device has to be plugged into a
root port or into a port on a self-powered hub. This message occurs when device
is plugged into a bus-powered hub.
3. Device appears with yellow bang (!) on device manager
This could happen when drivers are not found for this device or when drivers fail
to load. The drivers for this device are available on Windows Update or can be
downloaded from http://www.scmmicro.com. If the failure is due to driver load
failure, then the reason for driver load failure can be inferred from the device
manager message at the General tab.
4. Contact less cards are not detected
This could happen when module is placed in proximity to something made out of
metal. Ensure that there is not metal in proximity between the antenna and the
card.
5. Contact card is not detected
Check the connections on the two pin header. The terminals should be continuous
when a card is inserted.
6. Contact card cannot be read
Ensure that the cables between (both five and four pin) headers and the smart card
connector are of same length and type.
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DISCLAIMER
The module has been tested and determined to be compliant with the FCC and IC rules
for intentional radiators.
Changes or modifications not expressly approved by the party responsible for compliance
could void the user’s authority to operate the equipment.