Eurotherm 216, Руководство пользователя

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RTD INPUT RTD INPUT
RTD INPUT RTD INPUT RTD INPUT
Fig. 4 RESISTANCE TEMPERATURE
DETECTOR CONNECTION
NOTES NOTES
NOTES NOTES NOTES:
1) Do not run input wires together with power line
cables.
2) Pay attention to the line resistance; a resistance
higher than 20
Ω
/wire may cause measurement
errors.
3) When shielded cable is used, it should be
grounded at one side only to avoid ground loop
currents.
4) The impedence of the 3 wires must be the
same.
8
RTD
10 9 8
RTD
10 9
11
12
Log. input 2
LOGIC INPUT LOGIC INPUT
LOGIC INPUT LOGIC INPUT LOGIC INPUT
Safety note:
1) Do not run logic input wiring together with
power cables.
2) Use an external dry contact capable of
switching 8 mA, 8 V DC.
3) The instrument needs 300 ms to recognize a
contact status variation.
4) The logic input is NOT NOT NOT NOT NOT isolated by the
measuring input
Fig. 5 - LOGIC INPUT WIRING
The logic input can be programmed as:
A) Set point selector
A.1) In this case it will operate as follows:
logic input operat. set point
open SP
close SP2
B) Start timer
In this case it will operate as described at
paragraph 5.7 (Timer modes description).
02-0316-1-DER.pmd 22/04/2004, 16.19 3