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1 11-06-22-095 07/01
Series 2000 Reader System
Reader S251B (RI-STU-251B)
For detailed operating, connection and set-up instructions, please refer to the
corresponding Reference Guide (11-06-21-054) available from our TIRIS Document
Center at
General Purp ose Input / Output
Antenna
Power Fuse Synchroniz ation
+ -
RS422 / 485
RS232
CTL Setup
O.C. - I/O
Read O.K.
TX Active
EMI
Antenna
Tuning
O.K.
L á
RS422
RS485
DAT
L â
RF Power Output Adj .
EMI / Sync. Level Adj.
On
Reader S251B
Power Range Setting
12
A
1
15
B
16
C
16
D
16
G
16
F2
16
E F1 H
1
2
I
1 1
1
On
On On
J
123
Power Supply
Connect a regulated dc power supply (between 10 and 24V providing a minimum of 2A)
to the reader – the polarity of the connection is shown on the front panel of the reader.
Set the Power Range Setting wire bridge to match your input voltage.
(Default setting pin 2+3 connected – input power 18 – 24V, operating temperature range
–20°C to +70°C)
We recommend to use a linear power supply. If this is not possible and you wish to use a
switched mode power supply, DO NOT use one that operates below 200kHz.
(Switched mode power supplies that operate below 200kHz might interfere with
transponder signals and thus reduce the reading range.)
http://www.ti-rfid.com
The default switch settings for “CTL Setup”, “Synchronization” and “RS422/RS485/DAT”
are shown in the figure above.
In order to gain access to the fuse and connectors J, H and I, please remove the upper
and lower plastic cover strips. (remove the four screws holding the front panel)
A – Power Supply Connector
B – General Purpose I/O
C – Synchronization Interface
D – Carrier Phase
Synchronization Interface
E – Open Collector & I/Os
F1 & F2 – RS232 Interface
G – RS422/485 Interface
H – Indicator Outputs
I – Antenna Connector
J – Power Range Setting
Connectors
Getting Started
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Default Configuration
CTL Setup switch 8 is in the OFF position; standard TIRIS default parameters are used.
These are:
- Hardware interface RS232C, ASCII Protocol
- 9600 baud, eight data bits, no parity, one stop bit, Xon/X
off
enabled
- Normal Mode, Wireless synchronization
- I/O 0 to 3 defined as input, I/O 4 to 7 defined as output and logic high
Antenna
The Reader S251B can be used together with an antenna which applies to the following
specifications:
Parameter Minimum Maximum
Antenna Resonance Voltage -
380 V
peak
Antenna Inductance 26µH 27.9µH
Antenna Q-factor 40 350
Operating Conditions
Exceeding any of the recommended operating conditions (especially supply voltage,
supply current, operating temperature and antenna resonance voltage) may cause
permanent damage to the Reader.
The Reader itself generates heat. Therefore - if incorporated into a housing - you must
ensure (by proper design or cooling) that the temperature directly surrounding the
reader does not exceed the operating temperature range.
Warning
Always ensure that the reader is switched off when making or breaking connections to it.
Care must be taken when handling the reader. High voltage across the antenna
terminals could be harmful to your health. If the antenna insulation is damaged, the
antenna should not be connected to the reader.
Regulatory Notes
Prior to operating the RF-Module together with antenna(s), power supply and a control
module or other devices, the required FCC or relevant government agency (CE)
approvals must be obtained. Sale, lease or operation in some countries may be subject
to prior approval by government or other organizations. It is the responsibility of the
system integrators to get their complete system tested and to obtain approvals from the
appropriate local authorities before operating or selling this system.
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FCC Notices (U.S.A)
A typical system configuration containing the RF-Module has been tested and found to
comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules.
Modification to this device shall not be made without the written consent of Texas
Instruments Inc. Unauthorized modifications may void the authority granted under
Federal Communications Commission Rules permitting the operation of this device.
CE Conformity (Europe)
A CE Declaration of Conformity is available for the RFM at TI*RFID Sales Offices.
The equipment complies with the essential requirements of the Telecommunication
Terminal Equipment Act (FTEG) and the R&TTE Directive 99/5/EC when used for its
intended purpose.
Any device or system incorporating this module in any other than the originally tested
configuration needs
to be verified against the requirements of the Telecommunication
Terminal Equipment Act (FTEG) and the R&TTE Directive 99/5/EC. A separate
Declaration of Conformity must be issued by the system integrator or user of such a
system prior to marketing it and operating it in the European Community.
It is the responsibility of the system integrators to get their complete system tested and
obtain approvals from the appropriate local authorities before operating or selling the
system.
FCC ID: A92S251B
This device complies with Part 15 of the FCC
Rules. Operation is subject to the following two
conditions: (1) this device may not cause
harmful interference, and (2) this device mus
t
accept any interference received, including
interference that may cause undesired
operation.
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R ADIO F REQUENCY I DENTIFICATION S YSTEMS
Data Sheet
Series 2000 Reader S251B
Description
The Series 2000 Reader S251B provides all RF and
Control Functions to communicate with 134.2 kHz
HDX/FSK transponders. It sends an energizing signal
to the transponder, modulates the RF signal to send
data to the transponder, decodes and checks the received transponder data and transmits it via a
standard serial interface (RS232, RS422/485). The reader includes a Dynamic Auto Tuning (DAT)
function that automatically tunes a standard antenna to resonance and keeps it tuned during operation.
Specifications:
RI-STU-251B
Operating Temperature
Storage Temperature
Relative Humidity <97% non-condensing, IEC 68-2-30 Test Db, 21 cycles
RF Transmit Frequency 134.2 kHz
Power Supply 10 to 24 Vdc, regulated
Memory 64 kByte EPROM for Firmware
Data Storage 909 ID Codes (each 64bit)
Communications Interface RS232, RS422/485
System Architecture Point-to-point and point-to-multipoint
Communications Parameters 600 - 57600 baud, 7/8 data bits, even/odd parity
Communications Protocol ASCII with Xon/Xoff handshake, TIRIS Bus Protocol
Inputs/Outputs 8 configurable digital I/Os, 2 open collector outputs
Antenna Tuning Range
Antenna Resonance Voltage Max. 380 Vpeak
Transponder Types 134.2 kHz HDX/FSK
Dimensions (L*W*H)
Weight 900 grams
Mounting DIN rail TS35
-20 to +70°C (depending on power consumption)
-40 to +85°C
1kBit EEPROM for Configuration
32 kByte RAM for Data
26 to 27.9 µH (Dynamic Auto Tuning)
(200 mm x 120mm x 120 mm) ± 1.5 mm
For more information, contact the sales office or distributor nearest you. This contact information can be found
on our web site at:
http://www.ti-rfid.com
Texas Instruments reserves the right to change its products and services at any time without notice. TI provides customer assistance in various
technical areas, but does not have full access to data concerning the uses and applications of customers products. Therefore, TI assumes no
responsibility for customer product design or for infringement of patents and/or the rights of third parties, which may result from assistance
provided by TI.
© Copyright 2001 Texas Instruments Incorporated. 11-06-22-094 03/01
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