6
OPTIONAL. Note: EN and EN BAR connections are used for multiplexing systems on Reader
Model 1885(E) and Interface Model 2022(E). They are wholly unnecessary when using a Simplex
system, Model 1880 unless you want to be able to disable the Combo Reader from time to time via
command from the Interface. Connect EN and EN BAR inputs at TB2 - 1 and 2 to Interface outputs
EN and EN BAR. If used, connect shield to TB1 – 3, leave unconnected at other end. Remove J1 for
remote operation.
Select power source. Leave off while making connections:
AC - Connect AC power source to TB2 - 3 and 4.
Remove J2.
DC - Connect DC+ to TB2 - 3.
Connect DC- (GND) to TB2 - 5.
Install J2.
CAUTION!
Failure to remove the shorting jumper from J2 when operating with an AC power source will cause
permanent damage to Reader circuitry. The Reader is normally supplied with the shorting jumper
installed on J2 (DC operation).
2.4
POWER REQUIREMENTS
The Reader may be powered from regulated or linear, AC or DC power sources having the following
characteristics:
Voltage DC:
Voltage Range:
18 to 32 volts
Ripple:
100 mv p-p (max.)
Voltage AC:
Voltage Range:
24 v RMS (+10%, -20%)
Frequency:
47-63 Hz
Current:
Operating:
200 mA. (max.)
150 mA. (typ.)
Disabled:
30 mA (max.)
RFID, Inc. can provide transformers and power supplies suitable for use with the Model 1880. If you
provide your own power supply, it is recommended that you
avoid switching power supplies.
These
supplies produce electromagnetic interference (EMI) that
WILL
interfere with the operation of the
Combo Reader.
The Combo Reader assembly can operate from grounded or floating supplies. It may operate from a
separate ground reference with respect to the Interface or host computer.
