Environnement AS32M, Техническое руководство, Страница: 149 / 186

Duplication prohibited
ESTEL Board
Environnement
S.A
JUNE 2009
7
Specific configuration for 0–5 volt output instead of 0–10 volts
Four possible configurations allow for output of 0–5 volts:

Board configured for 0–10 volts with addition of a divider (by 2) bridge:
The user carries out the operation when specifying the acquisition system.
Operating mode: connect each analog output, previously configured for 0–10 volts, to ground
through two resistances of equal value within 500 and 1000 Ohms.
Remove the “divide by 2” signal at the terminals of resistance that are connected to the ground.
0-10 V
Ground
R
R
0-5 V
R = 500 ohms

Board configured for 0–10 volts with adjustment of half gain:
In menu «
Tests

ESTEL boards »
, adjust the A and B coefficients of each channel in order to
obtain 0–5 V at analog output for an analog-to-digital converter resolution fo 0–4000 points.

Board configured for 0–20 MA
Output of the acquisition system is carried out by the user.
Operating mode:
Connect each analog output, previously configured for 0–20 mA, to ground using a resistance of
250 Ohms, tolerance 1 %.
Voltage generated in this manner is equal to U
mV
= 250 x
I
mA
, that is to say 5 V for
I
= 20 mA.
NOTE : –
Place resistance to the nearest possible receiving equipment.
I
mA
: is the intensity of the electric current in milliamp.
I
: is the intensity of the electric current.

Modification of gain resistance on ESTEL board
Carried out by the manufacturer if other solutions suggested to the user fail.