RFID 2022 User manual

INSTALLATION AND OPERATING
MANUAL
FOR
SERIAL MULTIPLEX INTERFACE
MODEL 2022 Part No. 710-0018-00
MODEL 2022E Part No. 800-0070-00
Version 4.04 (year/month)

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TABLE OF CONTENTS
SECTION 1 -GENERAL INFORMATION
1.1 INTRODUCTION Page 3
1.2 DESCRIPTION Page 3
1.3 SPECIFICATIONS Page 4
SECTION 2 -INSTALLATION
2.1 INTRODUCTION Page 5
2.2 UNPACKING AND INSPECTION Page 5
2.3 PREPARING FOR INSTALLATION Page 5
2.4 POWER REQUIREMENTS Page 5
2.5 POWER CONNECTIONS Page 8
2.6 READER WIRING Page 9
2.7 READER CONNECTIONS Page 10
2.8 ABOUT ENABLE & ENABLE REMOTE Page 10
2.9 ABOUT SHIELDING Page 11
2.10 MATING THE INTERFACE TO A COMPUTER Page 11
2.10.1 SETTING SERIAL TYPE Page 11
2.10.2 ASCII FORMAT Page 12
2.10.3 DATA TRANSFER RATES, BAUD Page 13
2.10.4 SERIAL CABLING Page 13
2.10.5 SERIAL CONNECTION Page 14
2.11 DEFAULT OPERATING MODE Page 15
2.12 AUXILORY PORT FOR LCD Page 15
2.13 INSTALLATION COMPLETE Page 15
SECTION 3 -OPERATION
3.1 INTRODUCTION Page 16
3.2 THEORY OF OPERATION Page 16
3.3 TIMING Page 17
3.3.1 WORSE CASE TAG REPORT TIMING Page 17
3.3.2 TIMING SUMMARY Page 19
3.4 DATA PROTOCOL Page 20
3.5 ISSUING COMMANDS TO THE INTERFACE Page 20
3.6 INTERFACE RESPONSES Page 25
3.6.1 TAG DATA Page 25
3.6.2 ERROR MESSAGES Page 26
3.7 WARRANTY Page 27
If you are reading a pdf version of this manual you may notice page numbers and the above contents to
be off by a page from time to time. The conversion to Acrobat has a tendency to move sections as the
fonts don’t translate perfectly.

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SECTION 1
GENERAL INFORMATION
1.1 INTRODUCTION
This manual provides information pertaining to the installation and operation of the Model 2022
Interface (RFID, Inc. Part No. 710-0018-00), or Model 2022E (the E signifying enclosure) (RFID,
Inc. Part No. 800-0070-00).
1.2 DESCRIPTION
The Interface Model 2022 is termed Multiplex because it can manage up to 16 addressable Readers
and Antennas using time division multiplexing. The Interface Model 2002 provides a full-duplex,
asynchronous bit serial data stream which will interface to various equipment compatible with
RS-232-C,RS-422-A, or RS-423-A specifications. The Interface is configured as Data Terminal
Equipment (DTE).
The 2022 detects, filters and amplifies the data signals relayed by any of the compatible Readers
(Models 1845 and 1885) and converts that data into a serial string. Basically, the Interface provides
RF to digital translation of the signal produced by RFID, Inc. RF Electronic Labels, which are referred
to as "Tags", when placed in the proximity of a Reader/Antenna. Advanced error detection algorithms
provide error-free operation. All messages are transmitted in printable ASCII characters in
transmit-on-receipt or polled mode.
The Interface provides on its ENABLE outputs, pulses that control the operation of Addressable
Readers. In normal operation the Interface produces a pulse to disable all connected Readers, then
follows that with pulses that enable each Reader one at a time. During the brief period that each Reader
is enabled, the SIGNAL inputs are monitored for the presence of a Tag, and if detected, that Tag's
contents are reported along with a hexadecimal channel number identifying the Reader at which the Tag
was detected.
Via the serial connection, over which Tags are reported, the Interface can also be commanded to buffer
Tags, report multiple Tag readings, repeat the last message, test itself, reset, or delete specified Readers
from its polling loop.
The Eurocard format paired with the single supply voltage requirement simplify its integration into
existing installations. Connection to the Reader is made using low-cost shielded twisted pair cables and
angle entry terminals simplify installation.

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1.3 SPECIFICATIONS
Protocol: Full-duplex, RS232/423 or RS422
Selectable stop bits, parity sense, and word length
Serial Data Rate: Selectable baud rate, 110, 300, 600, 1200, 2400, 4800, 9600, 19200
Control Signals: DSR, CTS, DTR
Processing Speed: Up to 20 Readings/second
Data Storage: 2 Readings
Error Rate: Less than 1 in 10 to the 14th readings
Connectors
Serial: DB-25S
Power: 64-pin DIN 41612 Type C
Readers: 5 position screw type terminal strip
Multiplex Control: 2-wire, Multi-drop scheme, 48mA, max.
Input: 75 Ohms, Balanced, Multi-drop
Cabling Distance
to Readers: Up to 5000 feet, total (with shielded twisted pair cable)
Power Requirements: +5 Volts DC, +/-5% @ 350 mA. (max.) 250 mA. (typ.)
Temperature Range
Operating: -40 to +70 degrees C
Non-operating: -55 to +85 degrees C
Dimensions:
Model 2022: 7.0" x 3.9" x 6.6"
Model 2022E: 9.0" x 5.1" x 1.7"
Weight
Model 2022: 5.5 oz.
Model 2022E: 1.24 lbs (.56kg)

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SECTION 2
INSTALLATION
2.1 INTRODUCTION
This section contains information for unpacking, installing, and configuring the Interface, including power,
signal, and enable wiring, and rating power supplies. Installation also includes matching and connecting
the Interface to the Host Computer or Terminal.
2.2 UNPACKING AND INSPECTION
If the shipping carton is damaged or shows evidence of abusive handling, inspect the Interface for visible
damage including dents, scratches, etc. If the unit appears damaged, contact the carrier and RFID, Inc.
Sales or Customer Service Departments immediately. Keep the shipping and packaging material for the
carrier's inspection. RFID, Inc. will arrange for repair or replacement of the damaged unit without
waiting for the claim settlement with the carrier.
2.3 PREPARING FOR INSTALLATION
The power is provided through the Eurocard connector 64 pin DIN and signal connections are made
via a terminal strip on the printed circuit board. If the RFID, Inc. enclosure assembly is not provided for
the Eurocard, you must provide a Eurocard DIN connection with +5v on pins a1,c1, and ground on
pins a32, c32. To access the inside of the Model 2022E assembly, remove the end plates and remove
the printed circuit board assembly. The end plates may be removed by first removing the four corner
hex nuts on each end plate which secure it to the assembly. Refer to the Figure 2-1.
Following installation of all Reader wiring, the end plates should be reinstalled using the same screws.
The cable gland should be tightened to secure and seal the wiring.
2.4 POWER REQUIREMENTS
The Interface must be powered from a regulated power source (linear supplies are acceptable,
switching supplies are out of the question) having the following characteristics:
Voltage DC Voltage Range: 4.75 to 5.25 volts
Ripple: 100 mV p-p (max.)
Current Operating: 350 mA. (max.)
100 mA. (typ.)
RFID, Inc. can provide a power supply suitable for use with the Model 2022. The Interface should be
operated from a grounded supply that has the same ground reference as the host computer. The ground
reference used for the Readers may be of a different origin.

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2.5 POWER CONNECTIONS
On the Model 2022E, power wiring is already threaded through the cable gland and connected to the
solder tail DIN connector (P1) on the circuit card. There should be a knot in the wire to provide strain
relief. Wires should be connected in accordance with the following:
TABLE 2-1 POWER CONNECTIONS
DIN Connector (P1) CONNECTION
PIN NUMBER FROM DC SOURCE
a1,c1 +5v
a32,c32 DC Return (GND)
WARNING
The power source should be turned off while making connections to the reader. It is
recommended that the power source remain off anytime the circuit board is removed from its
enclosure assembly.
Power connection to the Interface should be made with the power source turned off. There is no
onboard over current protection so an external fuse is recommended to protect the power supply if it
has no over current protection of its own.
If the Interface is to be used without an enclosure, these mating DIN connectors are recommended for
connection of the power wires:
Panduit 100-964-454
Elco 208457096008026
Weidmuller 914605
If the Interface is to be housed in a backplane, make sure that pins a,c2 -a,c31 are left unconnected.
These pins are connections to the processor's data bus and can affect the Interface's operation if
improperly connected.
A note about power cable length: Long power cables will produce voltage drops resulting in a lower
voltage at the Interface end than at the power supply end. There is no inherent limit to the length of wire
from the supply to the Interface as long as the high and low voltage specifications are maintained at the
Interface.

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2.6 READER WIRING
This section describes the signal and enable wiring that connects the Interface to the Readers. The two
SIGNAL wires provide the path for RF data from the Readers into the Interface. The two ENABLE
wires provide multiplex control from the Interface to the Readers. Shielded, #14 to #28 AWG,
insulated, stranded wire is recommended and all wires should be stripped approximately 3/8 inch and
tinned. The following cables are recommended:
TABLE 2-2 RECOMMENDED CABLES
APPLICATION CABLE DESCRIPTION RECOMMENDED TYPE
Signal Only Cable, Paired, 2 Conductor RFID 214-2202-00 or
#22 AWG with foil shield Columbia C2514
Enable Only Polyethylene & PVC, 60 Deg C Manhattan M13226
Belden 8761
Signal Cable, Paired, 4 Conductor RFID 214-2204-00
and #22 AWG (1 Pr.) with foil shield Alpha 2464
Enable #22 AWG (1 Pr.) unshielded Manhattan M4451
Polypropylene & PVC, 60Deg C Belden 8724
Signal and Cable, Paired, 6 Conductor RFID 214-2206-00
Enable and #24 AWG (2 Pr.) with foil shield Manhattan M14477
Power 22 AWG (1 Pr.) unshielded Belden 8786
PVC, 80 Deg C
Whatever cable is selected should fit within the range allowed by the cable gland providing wire access
to the reader. The cable gland will accommodate diameters of .090 to .265 inches.
A note about "PLENUM" cabling, plenum cable eliminates the need for using conduit when installing
cables in air plenums. In typical modern buildings, a plenum exists between the drop ceilings and the
floors that support them. Because these air ducts often run across an entire story they can be a
convenient place to run cable, but they can also be an invitation to disaster if fire breaks out. Fire and
smoke can spread rapidly throughout the air duct system if the fire is able to feed on combustible
materials. The cables designated Plenum are approved by the NEC and UL because of their
flame-resistant and low smoke emission properties. While Plenum cable costs more than conventional
cable, the overall installed cost is generally less because it eliminates the need for conduit installation.
PLENUM
Cable, Paired, 2 Conductor Belden 89182
#22 AWG with foil shield
NEC 725, Class 2 classified

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2.7 READER CONNECTIONS
On the Model 2022E, wiring should be fed through the cable gland and connected to the angle entry
terminal strip (TB1) on the circuit card. Wiring should be connected in accordance with the following:
TABLE 2-3 READER CONNECTIONS
TERMINAL STRIP (TB1) NOMENCLATURE CONNECTION
1 SIG SIG on Reader
2 SIG SIG on Reader
3 SHD NO CONNECTION IF
CONNECTED ON
READER
4 EN EN on Reader
5 EN EN on Reader
2.8 ABOUT ENABLE AND REMOTE ENABLE
The Reader operation may be controlled (enabled, disabled) from the Interface via the enable outputs
(EN, EN) to the Reader. This is termed remote enable. Alternatively, a shorting jumper or shunt may
be placed across J1 on the circuit board of the Reader assembly. The shunt overrides the remote
enable control and continuously enables the Reader. This feature is maintained primarily for us, the
manufacturer as a testing and quality control tool. It is not recommended for use outside of testing the
Reader. The Reader is not normally supplied with the shorting shunt installed on J1. Refer to your
Reader manual for specific instructions. The typical circuit connection for the remote enable feature is
shown below.