Lenntech Testomat 2000, Руководство по эксплуатации

Страница: 35 / 58

Description of the signal inputs/outputs
35
Description of the signal
inputs/outputs
Connecting the signal inputs

Only connect the signal inputs "Start", "Stop", "IN1" and "IN2" with
volt-free contacts !
The connection of external voltages would damage the instrument!
Function Test
period Action
Start
External analysis
start (only normally open)
None In EXTERNAL operating
mode, an analysis is started
by triggering a contact at the
input.
Permanent contact results in
regular analyses.
Function Test
period Action
Stop
External analysis stop (e.g.
via flow controller or
process controller)
None There are no analyses while
the contact at the input is
open or closed
An active Stop input prevents an analysis start, e.g. via a current
interval. This can be necessary if the plant does not supply water. A
current analysis is stopped when the input valve is opened (while the
measuring chamber is being flushed or filled). The water which has
already entered the measuring chamber remains there. If the
measuring chamber is already full, the analysis is executed. Manual
start has priority over the Stop input, i.e. if the Stop input is active, an
analysis can be started manually or a manually started analysis
cannot be stopped by the stop signal. In the operating mode “time-
controlled”, the interval time continues when the Stop input has been
activated.

In , select
=> =>

Select the type of contact

Press "ENTER" to confirm the selection
Start
terminals 20,21
Stop
terminals 22,23
▼▲
CAUTION
!