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Technical Support
For Technical support please contact factory along with the
unit serial number displayed on the unit. Also provide
information of the PLC being used. Usually, including your
application also provides a lot of help. If possible e-mail
the application to us.
Renu Electronics Pvt. Ltd.
Survey No. 2/6, Baner Road, Pune – 411 045.
Maharashtra, INDIA
Tel: +91 20 27292840
Fax: +91 20 27292839
E-mail: support@renuelectronics.com
Website: www.renuelectronics.com
Follow the wiring diagram in Figure 2 to connect the
repeater to 2-wire half-duplex network. For 2 wire commu-
nication, consider TX+ as (A) & connect it to network's (A),
similarly consider TX- as (B) & connect it to network's (B).
For 2 wire with termination, user have to connect 180E
resistor externally between TX+ & TX-.
For 4 wire termination will be selected using switch "4" on
the unit.
TX+
CNV-03-B
TX-
RX+
RS485
RX-
2 wire /
SG
4 wire
connection
4 Wire RS485 Full Duplex
This communication mode is used to connect several
RS485 devices in master/slave fashion, where only one
unit (slave) talks at a time.During the marking or idle state
RS485 driver is disabled and the data lines are held in the
marking state by the 1K Ohm pull up and pull down
resistors.
To set the repeater to 4-wire RS485 full duplex, set switch
1 in OFF position. Set switch 2 in ON. Set switch 3 in ON
position if 180E termination is used else set it to OFF. If
termination value is other than 180E then connect it
between RX+ & RX- & set switch 3 in OFF position
A
B
TX+
SG
TX-
RX+
RX-
A
SG
B
SG
QUICK START
MANUAL FOR
CNV-03-B
Thank you for purchasing our Gateway series product -
CNV-03-B (RS485 Repeater). Read this manual thor-
oughly before installing and operating the unit.
This is only a Quick Start Manual. For detailed informa-
tion on this product download the user manual free from
the download section of our website. For a printed copy
of this manual contact our nearest sales office.
This document is based on information available at the
time of its publication and may not cover all the details or
variations in hardware or software. Renu Electronics
reserves the right to update information in this publication
without prior notice.
Note:
Any mechanical or electrical modification to this
unit will void all warranties.
Doc. No.: QM/CNV-03-B
REV No.: 2
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Summary of Contents for Renu Electronics CNV-03-B
- Page 1 Thank you for purchasing our Gateway series product - repeater to 2-wire half-duplex network. For 2 wire commu- CNV-03-B (RS485 Repeater). Read this manual thor- nication, consider TX+ as (A) & connect it to network’s (A), oughly before installing and operating the unit.
- Page 2 Figure3. This will cause all the slaves to have their transmitters and receivers connected & not allow communication between the slaves themselves. CNV-03-B RS485 2 wire OR 4 wire...
- Page 3 :Level 3 as per IEC1000-4-4 RS485 network. One CNV-03-B can increase maximum 32 Radiated Susceptibility :Level 3 as per IEC1000-4-3 nodes in the network. Multiple CNV-03-B units can be used Emissions :EN55011 CISPR A to support maximum 255 nodes in one network.
- Page 4 2. For mounting plate installation: Switch Settings a. Drill holes into your mounting surface (#36 drill recommended). There are 4 switches for setting: b. Align the repeater to the mounting plate and snap the 4-wire/2-wire configurations unit into place. RS422/RS485 selection c.
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