CEL-MAR ADA-4010, User Manual

Page: 4 / 12

2.2. DESCRIPTION
ADA-4010 converts RS485/RS422 standard to RS232 without interfering with format of transmitted data. Converter does not require
power supply from RS232 port and support the asynchronous transmission data with baud rate 230,4 kbps through four or two pairs of
twisted-pair cables connected to screw terminals. ADA-4010 uses RX, TX, RTS and GND signals for operating, and RTS signal is
looped with CTS and DTR with DSR, inside in the converter. Other signals are not connected. If the looping is not needed, can be not l
RTS or DTS to the terminal block.
Overvoltage protection was made on base safety diodes and fuses on each RS485/RS422 lines.
To RS485/RS422 bus, created on the base ADA-4010 converters, can be connected up to 32 devices, operating in mode:
● half duplex (query / response) on 2-wires or 4-wires multi-point bus,
● full duplex on 4-wires bus.
Fig 1. ADA-4010 view and SW1 location
2.3. CONVERSION OF TX, RX
Conversion RS232 to RS485/RS422 (and conversely) are Tx, Rx signals of RS232 interface.
There is automatic data flow control on RS485 bus in the converter.
4
ADA-4010
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)
G
N
D
G
N
D
D
T
R
D
S
R
R
T
S
C
T
S
T
X
R
X
(RS-232)
V
-
V
+
10 – 30
VDC
PWR TX RX
ADA-4010
RS-485/RS-422 to RS-232
CONVERTER
RS-232
RS-232 interface
RS-485 4-wires
or RS-422
RS-485
2-wires