R.V.R. Elettronica TLC300, User Manual

Page: 24 / 103

TLC300
20 / 42 User Manual Rev. 1.0 - 07/04/03
7.2.1 Balanced Analog Input
Each of these connectors can be used to connect eight balanced analog signals to
the device, as indicated in the table; each input accepts a voltage between 2 and
12V.
The table summarizes the functions to which a few balanced analog inputs of this
card are dedicated.
Input from No. 1 to No.4 are used for setting, with the relative trimmer, the level of
forward and reflected power of the connected machines.
Pin number Meant Adj. Trimmer
2 (+), 14 (
−
)
Forward power level 1 RV1
3 (+), 16 (
−
)
Reflected power level 1 RV2
5 (+), 17 (
−
)
Forward power level 2 RV3
6 (+), 19 (
−
) Reflected power level 2 RV4
8 (+), 20 (
−
) Forward power level 3 RV5
9 (+), 22 (
−
)
Reflected power level 3 RV6
11 (+), 23 (
−
)
Forward power level 4 RV7
12 (+), 25 (
−
)
Reflected power level 4 RV8
1, 4, 7, 10, 13, 15,
18, 21, 24
GND
The inputs No.1 and No.2 are used from firmware for the alarms generation of forward
and reflected power.
Limit voltages ranging from a minimum of 2V to a maximum of 12V can be applied to
the balanced inputs. However, during data processing, the CPU works with a
theoretical limit value of 5V. For this reason, there are eight trimmers (RV1-RV8),
next to the connector, one for each input, which are used to adjust the limit value set
externally to that of the internal circuitry.
To prevent the non-linearity introduced by protective diodes, do not exceed the 4V
limit.
The foregoing table shows each balanced input with the relative adjustment trimmer.
7.2.2 Digital/Analog Input
The meaning of these inputs change in according to the type of system to telemetry.
7.2.3 Rly Output
This connector makes the contacts of 8 bistable relay switches available in output.
The figure shows a diagram of the relay home or Off position.