B&B Electronics 485LDRC9 User manual

Documentation Number –p/n 8413R2 485LDRC9-0812qsg
©2010 B&B Electronics Manufacturing Company
U
UL L I In ns st ta al ll la at ti io on n I In nf fo or rm ma at ti io on n
Underwriters Laboratories Conditions of Acceptability –
When installed in the end-use equipment, consideration
should be given to the following:
1. The wiring terminals are suitable for factory wiring only.
2. This device is to be mounted in a suitable enclosure in
the end-product.
3. This device is suitable for operation at a maximum
surrounding air temperature as described in the
documentation.
4. These devices are intended for use in a pollution
degree 2 environment.
Input Voltage: 10 –30 VDC
Input Power: 0.5 Watts
Wire Range: 12 –24 AWG
Tightening Torque: 4 kgf-cm
Temperature rating of field installed conductors is 105 C
minimum, sized for 60 C ampacity.
Use copper wire only
Maximum surrounding ambient air temperature 80 C.
C
Ch he ec ck k f fo or r A Al ll l R Re eq qu ui ir re ed d H Ha ar rd dw wa ar re e
485LDRC9 Serial Converter
This Quick Start Guide
Additional Items Required but not included
oPower Supply
oRS-232 cable.
oRS-422/485 Cable.
Put
Quick Start Guide
485LDRC9
Optically Isolated RS-232 to
RS-422/485 Converter
I
In nf fo or rm ma at ti io on n - - D DI IP P S Sw wi it tc ch h
Table 3 –Communications Mode
SW-1
SW-2
SW-3
SW-4
RS-485
ON
ON
ON
ON
2-Wire
Half Duplex
RS-485
ON
OFF
OFF
OFF
4-Wire
Full Duplex
RS-422
OFF
OFF
OFF
OFF
Full Duplex
Table 4 –Termination Resistor
SW-5
Use the 120Ω
ON
Built in Termination
Use External
OFF
or no termination
Table 5 –Timeout Selection
SW-6
SW-7
SW-8
Timeout
(MS)
1200
OFF
OFF
OFF
8.33
#
2400
OFF
OFF
ON
4.16
4800
OFF
ON
OFF
2.08
9600
ON
OFF
OFF
1.04
19.2K
ON
ON
ON
0.580
38.4K
OFF
OFF
OFF
0.260
#
57.6K
OFF
OFF
OFF
0.176
#
115.2K
OFF
OFF
OFF
0.0868
#
Timeout selections are equal to one character time at the
indicated baud rate. Setting the converter 9600 will
generally work at 9600 and higher baud rates. In RS-422
mode, timeouts are not required.
# To achieve these timeouts you must place a through -
hole resistor on the circuit board. See Step 5 for more
information.
2
1
I
In nf fo or rm ma at ti io on n – – C Co on nn ne ec ct to or rs s
Terminal Block
Signal
Direction
A
RS-232 Receive Data (RD)
Output
B
RS-232 Signal Ground (SG)
-------
C
Power Ground (PWR GND)
-------
D
RS-232 Transmit Data (TD)
Input
E
NOT USED
-------
F
10 –30 VDC Power Input
-------
G
RS-422/485 TD A(-)
Output
H
RS-422/485 TD B(+)
Output
J
NOT USED
-------
K
RS-422/485 RD A(-)
Input
L
RS-422/485 RD B(+)
Input
M
Isolated Ground
-------
DB9 F Pins (Converter is DCE)
PIN
Signal
Direction
2
RS-232 Receive Data (RD)
Output
3
RS-232 Transmit Data (TD)
Input
5
RS-232 Signal Ground (SG)
-------
Note: On the DB9F Connector, control signals are looped
back. Pin 1 (DCD), Pin 4 (DTR), and Pin 6 (DSR) are tied
together. Pin 7 (RTS) and Pin 8 (CTS) are tied together.
3
4

Documentation Number –p/n 8413R2 485LDRC9-0812qsg
©2010 B&B Electronics Manufacturing Company
5
P
Po ow we er r C Co on nn ne ec ct ti io on n
R
RS S- -2 23 32 2 C Co on nn ne ec ct ti io on n
W
Wi ir ri in ng g E Ex xa am mp pl le es s
. Two Wire RS-485
L
Lo oo op p B Ba ac ck k T Te es st t / / T Tr ro ou ub bl le es sh ho oo ot ti in ng g
Configure for RS-485 Four wire, 9600 baud
Jumper terminals H to L and G to K
Connect a PC to the RS-232 port (see Step 7).
Using hyper terminal or similar program, connect to the
appropriate COM port (remember to set the baud rate
to 9600).Turn off hyper terminal local echo
Transmit data. The same data should be returned
LED Indicators: Power is ON when power is applied.
TD flashes when RS-422/485 data is sent. RD flashes
when RS-422/485 Data is received.
RS-422/ Four Wire RS-485
6
T
Th hr ro ou ug gh h- -h ho ol le e r re es si is st to or r p pl la ac ce em me en nt t
(
(O Op pt ti io on na al l) )
If you need to support timeouts indicated with a # in
Step 4, Table 5, you must place a through-hole
resistor on the PCB. Place the resistor in the R-11
spot designated on the board. The R-11 location is
clearly visible on the PCB.
Table 6 –Through-hole Resistor Values
Baud Rate
Timeout (MS)
R-11 Value
1200
8.33
820 KΩ
38.4K
0.260
27 KΩ
57.6K
0.176
16 KΩ
115.2K
0.0868
8.2 KΩ
8
7