Nedap uPASS TARGET - Communication Interfaces

uPASS Target | installation guide
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3.2 Communication
3.2.1 RS422 / RS485
The RS422 and RS485 interfaces are located in CONN. 1. The RS422 or RS485 communication can be used for
communication with the Access Control System, configuration settings and firmware update.
SW1-2 (located near USB port) selects RS422 (SW1-2 ON) or RS485 (SW1-2 OFF).
The RS485 interface can be used for point-to-point and multi-drop communication. Multi-drop communication requires
an addressable communication protocol, such as OSDP. The RS422 interface can only be used for point-to-point
communication. See next page for more details about point-to-point and multi-drop usage.
Connections
Figure
10: CONN. 1
Pin
RS422
SW1-2 ON
RS485
SW1-2 OFF
1
TX-
-
2
TX+
-
3
RX-
B
4
RX+
A
5
Ground
Ground
Table 2: RS422 and RS485 connection
Maximum cable length is 1200 meters / 4000 feet when using termination resistors.
Maximum cable length is 65 meters / 213 feet without termination resistors.
Notes
• SW1-1 ON/OFF = TRANSIT compatible mode / uPASS Standard mode (default).
• The RS422 / RS485 interface is disabled while the USB interface is connected.
• In UHFTOOL, the “main comm. interface” must be set to RS422/485 (see chapter 6.5.1).