User's Manual

ACG HF Multi ISO RFID Reader V1.0
ACG Identification Technologies GmbH 137
16.1.3.3 Electrical characteristics of J3 PINs in RS422 Configuration
PIN PIN No. Min Typ. Max. Description
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
RX/RXA 4 -7V +12V RXA RS422
TX/TXA 5 -7V +12V TXA RS422 /
Differential
RXB 6 -7V +12V RXB RS422
TXB 7 -7V +12V TXB RS422 /
Differential
Description PIN No.
Conditions Min Typ. Max.
Differential Output
Voltage
4/6 Unloaded GND V
CC
Differential Output
Voltage
5/7 Loaded:
R
L
=50Ω
2V V
CC
1
20
1
7
J3
+5V
Ground
RXA
TXA
RS422 Configuration
RXB
TXB
Figure 16-4: Pin out of jumper 3 in RS422 Configuration