HID Global Corporation 5553 Manuale Utente
1508-USM-00-0-04
HF Multi ISO RFID Reader User Manual, Firmware V1.4
Table 17 - J3 pins in RS485 Configuration - Electrical Characteristics
PIN No.
Min
Typ.
Max.
Description
PIN
RFU
1
Do not connect
4.5V 5V 5.5V Supply
Voltage
+5V 2
150mA
250mA
Supply Current (without SAM)
GND
3
GND
Ground for Power Supply and
Interface
Interface
RX/RXA
4
-7V
+12V
RX, connect to PIN 5
TX/TXA 5
-7V
+12V
TX
RXB
6
-7V
+12V
RX, connect to PIN 7
TXB 7
-7V
+12V TX
PIN No.
Conditions Min
Typ.
Max.
Description
Differential Output Voltage 4/6
Unloaded
GND
V
CC
Loaded:
R
R
L
=270
Ω
1.5V
V
CC
Differential Output Voltage
5/7
1
20
1
7
J3
+5V
Ground
RXA / TXA
Ground
RXA / TXA
RXB / TXB
RS485 Configuration
Figure 19 – RS485 Configuration - Jumper 3 Pin Out
J4
4
1
Figure 20 - Jumper 4 Pin Out - Top View
Page 132 of 144
August 2010
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