VERIDT INC · Middleton, WI 53562
1 9
www.veridt.com
2022
• T E C H N I C A L N O T E •
Verify Identify
Multi-Technology Readers
A common problem that occurs with multi-technology readers is not measuring load voltages and currents
versus no load (when the equipment is idle) with readers that draw more current than typical prox on simple
contactless readers.
Typical prox readers draw between 110-150 mA and are typically powered by the panel. Issues, such as common
grounding and measurements at load, are not relevant. For readers that draw more current, faults can occur
when the system is running because the voltage is inadequate.
Indicators of insufficient voltage at load include the following:
• A fault occurs at specific locations.
• A fault occurs under specific conditions, such as cardholder traffic or specific times of the day.
• The reader cycles through its startup cycle repeatedly.
The above fault types are strong indicators of insufficient voltage at load coupled with current limitations that
depend on the number of devices connected to a specific power supply.
The voltage drop table (see Table 2) defines the maximum length of cable for a specific gauge wire before a 10
percent drop in voltage occurs. When the cable exceeds the listed length, voltage drops below levels at which the
reader operates reliably, and various faults occur that require resetting the unit.
The cable lengths apply to any device. When both the reader and bridge are powered on the same power supply,
the bridge is similarly affected.
Compliance Statements
FCC 15.105 FCC (US
)
(a) For a Class A digital device or peripheral, the instructions furnished the user shall include the following or
similar statement, placed in a prominent location in the text of the manual:
Note: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to
part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate
radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at his own expense.
Industry Canada ICES-003 Compliance
CAN ICES-3 (A)/NMB-3(A)
FCC 15.19 FCC (US)
:
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 must accept any interference received, including
interference that may cause undesired operation.
IC (Canada):
This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following
two conditions: (1) this device may not cause interference, and (2) this device must accept any
24 Stealth Series Installation Guide 269-2010 Rev 07
interference, including interference that may cause undesired operation of the device.
Cet appareil est conforme aux normes Industry Canada exemptes de licence RSS standard(s). Son
fonctionnement est soumis aux deux conditions suivantes : (1) cet appareil ne doit pas provoquer d’interferences
et (2) cet appareil doit accepter toute interference, y compris les interferences susceptibles de provoquer un
fonctionnement indesirable.
#121
Installation Guide
Stealth Readers
