User's Manual

19
April ’00 Chapter 2. Hardware
2.2.1.8 H - Indicator Outputs
This connector (H in Figure 3) is a 2 x 3-pin (double row) pin header connection which
provides the LED output signals. Its pin assignment is given in Table 17 and its spec-
ifications are given in Table 18.
2.2.1.9 I - Antenna Connector
The antenna must be connected to the reader via the antenna terminals. The pin as-
signment for the antenna connector is given in Table 19. If a custom designed anten-
na is used, it must be within the specifications defined in Table 20 in order to ensure
that the dynamic autotuning facility functions correctly.
Table 17: Indicator Outputs
Pin Signal Description Direction
1 ACTIVE Open collector output: RF Module transmitter signal Output
2
V
R270
Current limited output: (270
Ω
in series to VCC) Output
3 O.K. Open collector output: O.K. signal Output
4
V
R270
Current limited output (270
Ω
in series to VCC) Output
5 RXSA
Receiver signal strength adjust output to monitor the
receiver signal strength threshold level
Output
6 GND Signal ground -
Table 18: Indicator Outputs - Specifications
Parameter Minimum Maximum
Open Collector (voltage) - 10 V
Open Collector (current) - 80 mA
Maximum voltage at current limiting 270
Ω
resistor - 5 V
Receiver signal strength output voltage (RXSA) 0.7 V 1.7 V
Table 19: Antenna
Pin Signal Description
1 ANT Tx/Rx antenna
2 ANT Tx/Rx antenna
Table 20: Antenna - Specifications
Parameter Minimum Maximum
Antenna Resonance Voltage - 380 Vpeak
Antenna Inductance 26.0
µ
H 27.9
µ
H
Antenna Q-factor 40 350