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QVS TV Converter Box IC-485S User manual
RS-232 - RS-485
INTERFACE CONVERTER
IC-485S
&
IC-485SI
User’s Manual
@Copyright 1994 ATEN@ International CO., LTD.
Manual part NO.PAPE-0075-200
Printed in Taiwan 06/94
PACKAGE CHECKLIST
When you purchase this product, it should contain the
following elements:
x1
l
IC-485S or IC-485SI Converter
l
Power Adapter (DC9V, 200mA)
l
IC-485S & IC-485SI User’s Manual x 1
x1
Attention: To prevent electric shock caused by
lightening, you must provide a ground
path by connecting a wire from the
Grounding Tab to the earth ground
(for IC-485SI only).
FUNCTION OVERVIEW
IC-485S/IC-485SI
1 FUNCTION OVERVIEW
TABLE OF CONTENTS
l-l INTRODUCTION
1 FUNCTION OVERVIEW .............
1
l-l Introduction ....................... 1
l-2 Specifications. ..................... 2
2 INSTALLATION .................... 3
2- 1 Installation Procedure. ............... 3
2-2 Switch Function Description .......... 4
3 OPERATION ....................... 6
The IC-485S and IC-485SI are a series of a bi-directional interface converters for RS-232 and RS485. The IC-485SI has built-in isolators for high
voltage (2OOOV) protection. With the IC-485 series,
ic-485s & IC-485SI, it provides Point-to-Point,
Multidrop and Simplex operations. The IC-485s
provides an extra Monitoring function.
3-l Point-to-Paint/4-Wire Full Duplex ..... 8
The IC-485 can be powered from the following two
ways:
3-2 Point-to-Paint/2-Wire Half Duplex ..... 9
1) a DC 9V, 2OOmA power adapter
3-3 Multidrop/4-Wire Full Duplex. . . . . . . . 10
2) the pin #9 of the RS-232 connecter
3-4 Multidrop/2-Wire Half Duplex ....... 11
3-5 Simplex/Transmit, Receive Only. ..... 12
3-6 Monitoring (for IC-485s only) ...... 13
4 OTHERS . . . . . . . . . . . . . . . . . . . . . . . . . .
14
4- 1 Terminal Block Definition. .......... 14
4-2 Self Test ......................... 15
Two slide switches are used to configure its operation mode, contention control, and assignment of
the RS-232. Following figure is the IC-485’s external view.
DB-85 Female
Terminal
Block
APPENDIX A
Trouble Shooting ..................... 16
RS-232 DCE/DTE Description .......... 17
Preventing Radio & TV Interference. ..... 18
RJ-ll(ICG485S)
GND TAB(G485SI)
Figure l-l External View
User’s Manual
1
FUNCTION OVERVIEW
IC-485S/IC-485SI
INSTALLATION
IC-485S/IC-485SI
2 INSTALLATION
2-1 INSTALLATION PROCEDURE
1-2 SPECIFICATIONS
Before installing the IC-485 you will need a 4wire cable. This cable must go from your location to
the place you want to connect to.
Installation Procedure:
Connector
Function Switch
Enclosure
Weight
Dimensions
RS-485/422: A 4 terminal block
and RJ-1 l* or GND
TAB**
SWl:DCE,DTE, MONITOR*
selection
SW2:TxON. RxON
SW2:TxRTS, RXXrt
SW2:TxRTS. RxON
Plastic
60 gm
54x74.5x18.5mm
Figure l-2 IC-485 Specifications Table
* RJ-11 Connector & Monitor mode for
IC-485S only.
1 Before installing the IC-485 to the PC, decide
one of the 6 possible configurations suitable
for your application. Please check Chapter 3
OPERATION for correct slide switch settings
and phone wires connection, then connect IC485 to the PC.
For IC-485SI: Connect a wire from the
Grounding Tab to the earth
ground.
2. Turn on PCs.
3. Insert the adapter’s plug into the POWER
JACK in the right side.
4. Plug the power adapter into an AC outlet. The
unit is now ready for operation.
* * Grounding TAB for IC-485SI only.
2
User’s Manual
User’s Manual
3
IC-485S/IC-485SI
INSTALLATION
INSTALLATION
the RS-485 line signals (for IC-485S
only).
2-2 SWITCH FUNCTION DESCRIPTION
Refer to the location of the SW1 and SW2, please see
Figure 1- 1.
Position 2: (TxRTS, RxRTS) means the K-485 is in
transmitting mode while RTS signal is at
high level and it is in receiving mode
while RTS signal is at low level.(using
in Multidrop mode)
IC-485SI:
SW 1: Device Mode Selection
Position 1: DCE means the IC-485 is set at DCE
mode and it must be connected to a DTE
device.
Position 2: DTE means the IC-485 is set at DTE
mode and it must be connected to a DCE
device.
Position 3: Monitor means the IC-485S is set at
monitor mode and it is used to monitor
4
SW2: Transmitting and Receiving mode selection
Position 1: (TxON, RxON) means the IC-485 is
always in transmitting mode and in receiving mode.(using in Point-to-Point
mode)
IC-485S:
-____
IC-485S/IC-485SI
User’s Manual
Position 3: (TxRTS, RxON) means the IC-485 is
always in receiving mode and it is in
transmitting mode only while RTS signal is at high level.(using in Multidrop
mode to monitor the RS-485 line signals)
Note:
DTE means Data Terminal Equipment.
DCE means Data Communication
Equipment.
More detailed information, please refer
to the Appendix.
User’s Manual
5
IC-485S/IC-485SI
OPERATION
3 OPERATION
The IC-485S & IC-485SI supports 4 kinds of
functions in 6 kinds of configurations. They are
1. Point-to-Point
Point-to-Point configuration means two devices
which locate at two different places can be linked
together to communicate through a couple of IC-485
devices.
1.1 Point-to-Paint/4-Wire Full Duplex( Fig. 3- 1 )
1.2 Point-to-Pointi2-Wire Half Duplex( Fig. 3-2 )
2. Multidrop
Multidrop configuration means that more than
two devices can be linked all together to communicate one another through many IC-485 devices. In
this configuration, one of the IC-485 devices will be
connected to a master device and the rest of IC-485
devices will be connected to many other slaver devices.
2.1 Multidrop/4-Wire Full Duplex( Fig. 3-3 )
2.2 Multidrop/2-Wire Half Duplex( Fig. 3-4 )
3. Simplex/Transmit, Receive Only( Fig. 3-5 )
6
User’s Manual
OPERATION
IC-485S/IC-485SI
Simplex configuration means that more than two
devices can be linked all together to communicate
through many IC-485 devices. Its configuration is
like the Multidrop’s, but the master device can talk
only a n d the slaver devices can listen only.
4. M o n i t o r Mode( Fig. 3-6 ) (for IC-485S only)
Monitor configuration means a IC-485s device
c a n be wir ed to the lines of RS-485 or RS-422 devices
to monitor the line signals. In this configuration the
IC-485S will change the function of T+ and T- to
R’ : :cncl P‘ r espectively
Before operating, user must complete the installation a c c o r d i n g to the procedure mentioned in Section 2- 1
Once the installation had been done, the device
should operate as the setting function.
IC-485S/IC-485SI
OPERATION
OPERATION
3-1 POINT-TO-POINT/~-WIRE FULL DUPLEX
A
B
IR+
r/
T+I
IC-485S/IC-485SI
3-2 POINT-TO-POINT/2-WIRE HALF DU-
/
I
I
Configuration:
Configuration:
A
B
1 DCWJITE
1 DCE/DTE
Figure 3- 1
) TxON,RxON
) TxON,RxON
POINT-TO-POINT/4-WIRE FULL
DUPLEX
Figure 3-2 POINT-TO-POINT/2-WIRE HALF DUPLEX
In above Figure if the PC 1 is a DTE device, then
the Device A should set the SW1 to DCE. If the PC1
is a DCE device, then the Device A should set the
SW1 to DTE. The switch setting method for the
Device B is identical to Device A’s.
Note: All the SW1 setting in this Chapter are following the setting rule indicated in this Section.
8
User’s Manual
User’s Manual
9
IC-485S/IC-485SI
OPERATION
---.- __
3-3 MULTIDROP/4-WIRE FULL DUPLEX
OPERATION
3-4 MULTIDROP/2-WIRE HALF DUPLEX
Bl
PC1 =>
COM1/
COM2
IC-485S/IC-485SI
B1
A
=>PC2
COM1/
COM2
R+
R-
PC1
COM1/
COM2
Ii-485
=>PC2
COM1/
COM2
b2
-I
=>PC3
COM1/
COM2
=>PC4
COM1/
COM2
Configuration:
Bn
Configuration:
DCE/DTE ] TxRTS, RxON
B
TxRTS, R X
Note: Bn means any one of the B 1, B2, B3 and SO on.
Note: Bn means any one of the B 1, B2, B3 and so on.
Figure 3-3 MULTIDROP/4-WIRE FULL DUPLEX
Figure 3-4 MULTIDROP/2-WIRE HALF DUPLEX
10
User’s Manual
User’s Manual
11
IC-485S/IC-485SI
OPERATION
3-5 SIMPLEX/ TRANSMIT, RECEIVE ONLY
B1
PC1
COM1/
COM2
=>
IC-485S/IC-485SI
OPERATION
(for IC-485S only)
3-6 MONITORING
Device 2
RS-422lRS-405
Device 1
=>PC2
COM1/
COM2
=>PC3
COM1/
COM2
=>PC4
COM1/
COM2
Configuration:
--l
R+
IC-48%
=>PC
COMl/
COM2
Note: R+ and R- signals are converted and linked to
the RS-232 port, DB-25 pm 3. R’ + and R’ (T+ and T-) signals are converted and linked
to the RS-232 port, DB-25 pm 2.
Configuration:
A
Bn
1 DCE/DTE 1 TxON, RxON
1 DCE/DTE ) TxON, RxON
Note: Bn means any one of the B 1, B2, B3 and so on.
Figure 3-5 SIMPLEX/TRANSMIT, REC-EIVE
ONLY
12
1
A
User’s Manual
M O N I
1 TxRTS, RxON
Note: The RTS must be at the low level in monitoring
mode.
Figure 3-6 MONITORING
User’s Manual
13
IC-485S/IC-485SI
OTHERS
4 OTHERS
4-1 TERMINAL BLOCK DEFINITION
The four screw terminal block has different definition in different operation modes.
In the DCE/DTE mode, the terminal #l (+V) and
#2(-V) are configured to transmit data, the transmitter; the terminals #3(-V) and #4(+V) are configured
to receive data, the receiver.
In the MONITOR mode (for IC-485S only), the
terminals #l and #2 are respectively the positive and
negative of receiver #I; the terminal #3 and ##4 are
the positive and negative of receiver #2.
OTHERS
IC-485S/IC-485SI
4-2 SELF TEST
To test the internal circuit of the interface converter, connect a dumb terminal to the unit and process as follows:
1. Set SW1 to DCE (if the dumb terminal is a DTE
configuration).
2. Set SW2 to TxON, RxON.
3. Connect one wire from Tx+(#l) to Rx+(#4),
and connect another wire from T X-(#2) to Rx(#3X
4. Set the terminal to full duplex and enter data,
then the data should be displayed on the screen.
5. If this o c c u r s the internal circuit is operational.
Figure 4-l Terminal Block
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User’s Manual
15
APPENDIX A
RS-232 DCE/DTE DESCRIPTION
TROUBLE SHOOTING
transmission
at the DC 9V
Power Adapter is available.
. Check that the IC-485 is
plugged securely in PC.
. Check that the 4-wire cable
is connected properly at
If failure of printing is still exists upon aforesaid
solutions, please contact your dealer for help.
16
User’s Manual
Device’s Connector Pin #
Cables
IC-485
Note: The DTE mode device must be connected to
a DCE mode device because the polarity of the
communication signals are different. The
shadow area is a connection example for a
DTE device to a DCE device.
User’s Manual
17
3. Move the computer away from the receiver.
PREVENTING RADIO & TV INTERFERENCE
Warning this equipment generates, uses and radiates radio frequency energy and if not installed and
used in accordance with the instruction manual may
cause interference to radio and television reception.
It has been tested and found to comply with the limits
for a Class A computing device in accordance with
the specifications in Subpart J of Part 15 of FCC
Rules, which are designed to provide reasonable
protection against such interference when operated in
a commerical environment. Operation of this equipment in a residential area is likely to cause interference, in which case the user at his own expense will
be required to take whatever measures may be required to correct the interference.
4. Plug the computer into a different outlet so that
computer and receiver and on different branch
circuits.
5. Ensure that the mounting screws, attachment
connector screws and ground wires are tightly
secured.
6. Ensure that good quality, shielded and
grounded cables are used for data communications.
If necessary, the user should consult the dealer or
an experienced radio/television technician for additional suggestions.
If this equipment does cause interference to radio
or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the interference by one or more
of the following measures:
1. Reorient the receiving antenna.
2. Relocate the computer with respect to the receiver.
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User’s Manual
User’s Manual
19
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