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Datasheet
deciPak Isolated Serial
Communication Interface
(SCI)
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United States
Canada
Mexico
Weidmuller Inc.
Weidmuller Ltd.
Weidmuller, S.A. de C.V.
821 Southlake Blvd.
10 Spy Court
5 Sur No. 4311
Richmond, Virginia 23236
Markham, Ontario L3R 5H6
Col. Huexotitla
Telephone: (800) 849-9343
Telephone: (800) 268-4080
72534 Puebla, Pue. Mexico
Facsimile: (804) 379-2593
Facsimile: (905) 475-2798
Telephone: (22) 37 2549
Email: [email protected]
Email: [email protected]
Facsimile: (22) 43 1981
Website: www.weidmuller.com
Website: www.weidmuller.ca
Email: [email protected]
available in DC or AC powered versions
RS232/485 isolation
high speed -120Kb/s
jumper configurable for DTE, DCE, half or full
duplex
jumpers accessible from front of unit
convenient connections - RS232 through 9
way D-sub connector, RS485 and power
through screw terminals
RS485 termination resistors socket mounted
and accessible from front
input and output are surge protected
controlled driver voltage slew
RS485 short circuit protected and fail safe
CSA approved
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deciPak Isolated Serial Communication Interface
Rated data
Supply voltage
12-35Vdc
230Vac±10%
120Vac±10%
Supply current
40mAdc
15mAac
25mAac
supply to RS232 (Vac RMS)
0
1600V
1600V
supply to RS485 (Vac RMS)
1600V
1600V
1600V
RS232 to RS485 (Vax RMS)
1600V
1600V
1600V
Operating temperature
0-70°C
0-70°C
0-70°C
Maximum baud rate (subject to cable length)
120 Kbits/sec
120 Kbits/sec
120 Kbits/sec
RS232
EIA RS232C
EIA RS232C
EIA RS232C
40 ft @100Kbit/sec
40 ft @100Kbit/sec
40 ft @100Kbit/sec
±10V
±10V
±10V
EIA RS485 / EIA RS422
EIA RS485 / EIA RS422
EIA RS485 / EIA RS422
4000 ft @100Kbit/sec
4000 ft @100Kbit/sec
4000 ft @100Kbit/sec
unit load
unit load
unit load
1/2 unit load
1/2 unit load
1/2 unit load
ten, Typ. enable time [email protected]°C
90µSec
90µSec
90µSec
Min. AutoPulse to initiate drive @25°C
1.1µs
1.1µs
1.1µs
Ordering data
Cat.No.
Cat.No.
Cat.No.
deciPak Serial Communications Interface
991635
991676
991677
Isolation
typical max. cable length
typical voltage levels
RS485
typical max. cable length
receiver cable load (half duplex)
receiver cable load (full duplex)
Notes:
• RS485 short circuit protected
• RS485 failsafe receiver inputs
• RS485 driver can be enabled by RTS or DTR or may be automatically activated. The activation timeout can be altered by changing a resistor.
• Depending on speed of operation in the automatic activation, it is advisable to initiate transmission by forcing the Transmit Data line low for a
very short period (e.g. set break) prior to the transmission of data.
• Default setting J2-8 in position 1-2 i.e. set for IBM PC with direct connection cable. DTR enabled, DSR and CTS enabled with pullup resistor
to 10V. J9 is in position 2-3 (full duplex) and J10 is set to full duplex. 120M resistors are used for termination resistor (R19, 20) and the
automatic activation period is set for 9600 baud.
• Detailed configuration and instructions available on request or on our WEB site at: www.weidmuller.ca (under “Application”)
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Subject to technical changes · Printed in Canada · 99990163 · 06/2001
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