Campbell CR500 Spezifikationen PDF herunterladen (Seite 13)

2.3 Pulse Gounters,

Digital

Inputs, and

Gontrol

Output

cR50(r

''

Excitation channels: Provide a

precision,

programmable

switched

voltage for sensors that

require

excitation.

Range: t 0

-

2.5 VDC.

Power

ground:

Connect

cable shields to this

ground

to minimize

electrical noise and

protect

against voltage

transients.

The

main

grounding

lug;

labeted "earth

ground",

must

be tied

to earth

ground.

Also used

as

excitation

return for

some

sensors.

Pulse

Counters:

To measure switch

closures and

voltage

pulse

type sensors.

P1 and

P2 are

programmable

for

switch

closure,

voltage

pulse,

or low level,AO

signals

(see

spec

sheet

on

page

i).

CAPT can

be

programmed

to count switch

closures

at

a

rate up

to

40Hz

(see

below).

Power

Ground:

Use as

ground

reference

for

pulse

counters,

binary

inputs, SDI-12

inputs, 12

VDC

or 5 VDC

outputs.

Ground

terminal

for

cable shields

to minimize

electrical

noise on sensor

inputs and

protect

against

voltage transients.

The

main

grounding

lug, labeled

"earth

ground",

must be

tied to the earth

ground.

Digital UO

Ports:

Port

Cl:

When

configured

as

input

can be

programmed

as

an

SDI-I2

communication

line orto

read the status

of a

line.

When

configured

as

output can

be set

high

(5

VDC)

or

low

(0

VDC) according to

time or a condition.

Typically

this

port

can

be used

to

activate an

external device

(e.9.,

a

sampler) through

a

relay.

Port

C2lP3:

Dualfunction controlled

by CR500

program.

-

C2:-

Input

only.-SDl-1'2'communieation

line or

monitoring

the

status of a line.

P3:

Port can be

programmed

to count switch closures

up

to

4AHz.

Example: tipping bucket

rain

gauge.

ffiffiffiffiffi

P2

ffiffiffi

G

ffiffiffiffiffiffiffiffi1

c1 c2

P3

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 47 48

Kommentare zu diesen Handbüchern

Keine Kommentare