Installation
16
Connecting the inputs and outputs
Testomat 2000
®
has the following connections for control and moni-
toring functions.
Do not connect external voltage to these connections!
Ensure that the leads are held securely in the terminals.
Use the two fastening screws to close the upper door once installa-
tion has been completed.
For more information, please refer to the section entitled "Description
of the signal inputs/outputs".
No.
Terminal
description
Typ
e
Function
Comment
20
21
Start
IN
External analysis start
Common earth for inputs
Only for volt-free normally
open
22
23
Stop
IN
External analysis stop
Common earth for inputs
Only for volt-free normally
closed/normally open
24
25
IN1
IN
Universal input 1
Common earth for inputs
Only for volt-free normally
closed/normally open
26
27
IN2
IN
Universal input 2 (water meter)
Common earth for inputs
Only for volt-free normally
open
┴
28
29
OUT
OUT
Earth
0/4 - 20 mA galvanically separated
or serial interface RS232
Earth =
┴
28 = (+) or (TxD)
29 = (-) or (RxD)
