MPR-2010AR
Page 11
Doc# 041308
AWID PROPRIETARY
TABLE 3.4-1: Data Line’s Wiring Requirement
WIRE SIZE
#22 AWG (0.6 mm Dia.)
#24 AWG (0.5 mm Dia.)
RS-232
50 ft (15 meters)
50 ft (15 meters)
3.5 WIRING
DIAGRAMS
See section 2.1 for pin assignment for the RS-232 connector.
MPR-2010AR’s RS-232 interface is a short distance serial interface, a full command set
for the standard serial interface is not necessary, therefore only transmit, receive and
ground wires are used. Sense input is an enable input, which is traditionally used to
activate the RF energy of the reader and to start the read functions.
3.6 GROUNDING
Grounding is critical for proper operation of MPR-2010AR. When installing the reader, it
is crucial to assure that the earth ground is the best ground available. If you elect to use
the 120 VAC power ground, conduct a test by measuring its resistance relative to a
known good ground, such as a cold water pipe or structural steel that is in direct contact
with the ground. The resistance should be less than 50 ohms.
