Digital Watchdog D2363D Manual de usuario descargar pdf (Pagina 9)

PSS 21H-1B2 B3

Page 9

(A)

The twinaxial Fieldbus uses a dual-conductor coaxial cable.

(B)

Fieldbus Isolator(s) required.

(C)

Fiber Optic Modem(s) required.

(D)

Excluding expansion modules.

FUNCTIONAL SPECIFICATIONS

Processor Type

Microprocessor-based Intel 386 with stored

programs,

using high-speed communication

capability.

Memory

SIZE

4 MB storage

ERROR DETECTION

Parity provides single-bit error detection for

each

byte.

Process I/O Communications

LOCAL TWINAXIAL

(A)

FIELDBUS

Ty p e

EIA RS-485

Distance

10 m (30 ft)

Transmission Rate

268.75 Kbps

EXTENDED TWINAXIAL

(A)

FIELDBUS

(B)

Ty p e

EIA RS-485

Distance

1800 m (6000 ft)

Transmission Rate

268.75 Kbps

FIBER OPTIC FIELDBUS

(C)

Ty p e

Optical

Distance

20 km (12.4 mi)

Transmission Rate

268.75 Kbps

Process I/O Capacity

LOCAL

24 Fieldbus Modules

(D)

, maximum

EXTENDED

64 Fieldbus Modules

(D)

, maximum (24 maximum on

any one Fieldbus Isolator)

PANEL DISPLAY STATION INTERFACING

Up to 64 FBMs

(D)

or FBM equivalents (24 maximum

on any one Fieldbus Isolator). One Panel Display

Station counts as two FBMs. For example, if 24

FBMs are used, only 20 Panel Display Stations may

be used.

Power Requirements

INPUT VOLTAGE (REDUNDANT VOLTAGE)

39 V dc typical

CONSUMPTION (PER NON-FAULT-TOLERANT

MODULE)

15 W, maximum

Indicators

Red and green light-emitting diodes (LEDs) indicate

operational status.

Internal Diagnostics

Self-checking performed at power-up. Runtime checks

and watchdog timer function performed during

operation.

1 2 3 4 5 6 7 8 9 10 11 12

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