Robust DataComm rdc485ir3-dv-3p-cc Repeater Guia De Especificação

Dimensions in mm (and inches)

Specification

Order Information

: at least 115Kbps over 500m
: transparent, no configuration required
: Each receive signal has LED (yellow)
: 1000m for EIA/RS-485
: less than 3000m for RS-485
  (requires quality, low-cap cable < 50 pf/m)

: EIA/RS-485A
: -7 to +12 vDC
: +/- 25 vDC

Mechanical / Environment

Communication:

Power Supply:

Isolation

LEDs (green) indicate isolated power status

25 (1.0)

79 (3.1)

85.5 (

3

.4)

90.5 (

3

.6)

93.0 (

3

.7)

EN 50 022 - 7.5mm
EN 50 035
EN 50 022 - 15mm

93 (3.7)

Block Diagram

Gnd-B

LED

V+
V--

Main
Supply

LED

(ISO/IEC 9549)

screw terminals

Isolated

Supply

D+A

D--A

LED

Gnd-A

LED

screw terminals

-

Installed

FI

Not installed 

5v

2p

3p

D+B
D--B

Model: rdc485ir3

5v +/- 5% Regulated DC Supply

9 to 36v Unregulated DC Supply

rdc485ir3

-

-

D+A

D-A 

Gnd-A

dd

dv

3-port, isolation between ports A, B & supply

2-port, Gnd-B = Supply Ground (5v supply only)

-

Signal Type ................
Voltage Level ............
Permitted Surge .......

Port A to Port B .........
Supply to Port A .......
Supply to Port B ........
Conformal Coating ..

: 2500 v (optical, 5kV test)
: 2500 v (galvanic, 3kV test)
: 2-port = none ; 3-port = 2500v
: 14,000 v per mm

: -20C to +65C
: -40C to +100C
: 10 to 90% RH, non-condensing
: wire up to 2.5mm (12 AWG)
: nylon polymide, fungus and termite resistant
  self-extinguishing, epoxy potting
: approx 130g
: DIN EN 50 022 or DIN EN 50 035

Operating Range .......
Storage Range ............
Relative Humidity.......
Terminals .....................
Case Material .............

Weight .........................
Mounting Rail .............

Max Speed .................
Character Setting .....
User Indications ........
Standard Distance ...
Practical Distance .....

Copyright © 1996 Robust DataComm Pte Ltd

The rdc485ir3 safely connects 2-wire RS-485 
devices and networks together without danger of 
ground loops and damaging surges.  It also dou- 
bles permitted cable length. The isolated DC 
supplies provide full 3-port galvanic isolation up 
to 2.5 KV, which also implies that the grounds of 
the data ports are floating with respect  to each 
other as well as the supply port. Data direction 
control is fully automatic. The internal terminating 
resistor (120 ohms) and bias resistors can be 
enabled via jumpers.  500 watt voltage transient 
suppressor diodes protect the rdc485ir3 from 
normal mode surges, while the full galvanic 
isolation protects the rdc485ir3 from common 
mode surges. With the "Fault Isolation" (

FI

) 

option, line breaks and/or shorts on Port A's 
segment will not interfere with the data on Port 
B's segment.
Isolation, industrial design, small size, DIN rail 
mount, user indication, and DC supply make the 
rdc485ir a very engineer-friendly device for your 
industrial data communication system.

3-pin Removable Compression Terminal Blocks

D-sub 9-pin for both ports (1 x male, 1 x female)

Removable screw terminal for both ports

cc

: 1.2 watt (About 50 mA @ 24 Vdc)
: About 175 mA

9 to 36v DC................
5v DC +/- 10%...........

RS-485 Ports

Fault Isolation

Master

rdc485i

r3

Slave 1

Slave 2

rdc485i

r3

Slave 3

Slave 4

Fault Isolated Segments

When a line fault (short or 
open-circuit) occurs at any 
one of the segments, the 
other segments will not be 
affected.
For example, when a line 
short occurs between slaves 
3 and 4, the Master will still 
be able to poll slaves 1 and 2 
normally.

Port B

Port A

Port B

Port A

-

with conformal coating

without conformal coating

cf

Making Industrial Data Flow Like Water ... Safely, Silently, & Sanely

Robust DataComm Pte Ltd (USA) 26471 Portola Pkwy #1E-242, Foothill Ranch CA 92610-1743, +1,972-248-7466
(International) 18 Kaki Bukit Road 3 #02-08 Entrepreneur Business Centre Singapore 415978, +65,6487-5624