CEL-MAR ADA-401WA, Руководство пользователя

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2.2. DESCRIPTION
The industrial addressable RS-485 converter to 1-WIRE ADA-401WA enables on basis of the RS485 bus to build the network with
addressable node, to which it is possible to connect a lot of devices with the 1-WIRE interface so as: arrangements for the
measurement of the temperature, clocks of the real time, the EPROM memory, A/C converters, for and the like. Applying ADA-401WA
converter as addressable node for the 1-WIRE bus increase the distance up to 1200m between 1-WIRE devices and the computer
with the monitoring software or other the MASTER type device. This distance can be increased for another 1200m by using ADA-4040
repeater.
The DS2480B system provide conversion from 1-WIRE interface to RS-485 interface in ADA-401WA and the converter of TTL levels
on RS-485. It's exempt the user from go into details of the enough complicated 1-WIRE protocol.
Applying the additional RS-485 converter to RS-232 ADA-1040 or USB to RS-485 ADA-I9140 enables to monitor and/or to control the
1-WIRE negotiations through the RS-232 interface or USB in the computer of the class equipped with the PC into the appropriate
software. CEL-MAR Company gives the materials to creating software on the basis of ADA-401WA converters.
ADA-401WA is equipped with screw terminal for twisted connection of 1-WIRE and RS-485 bus, as well as for connecting the power
supply.
Over-voltage protection on each RS-485 line was made on base over-voltage LEDs and fuses.
It is possible to connect 32 ADA-401WA devices operating in linear topology to RS-485 bus. It is possible to connect other 32
converters by applying ADA-4040 repeater.
ADA-401WA is adapted for powering permanent tension from the outside source which value should contain oneself around from the
10V up to the 30V and was delivered from power pack about the power of 2W min. Converter has Implemented protection against
opposite polarization of power supply.
Fig. 1. View of ADA-401WA
4
ADA-401WA
62mm
Power Supply
10 - 30 VDC
9
0
m
m
53mm
1
0
m
m
1
0
m
m
(SW1) G
N
D
T
X
+
/A
T
X
-
/B
R
X
+
R
X
-
(RS485/RS422)
RS-485 4-wires
or RS-422
RS-485
2-wires
N
C
N
C
N
C
N
C
V
D
D
1-
W
G
N
D
N
C
(1-WIRE)
V
-
V
+
10 – 30
VDC
1-WIRE (3W)
Interface
1-WIRE (2W)
Interface
PWR TX RX
ADA-401WA
ADDRESSABLE
RS485/422 to 1-WIRE CONVERTER
1-WIRE