PT610, PT620, PT630
Instruction Manual
38
Figure 12.3 - Connection diagram of the Outputs. U is an external power source.
5.3.11 Analogue output
Note:
REQUIRES THE ANALOGUE OPTION.
The instrument is programmable to one of 4 – 20mA, 0 – 20mA, 0 – 5V or 0 – 10V analogue output
modes.
The analogue output is automatically adjusted to the weighing range after calibration. The mid value of
the analogue output range is set to represent zero load if bipolar use is configured. Manual analogue
output adjustment is available in parameter group
[19-]
(see 6.2.9.1).
The analogue output is in proportion to the gross load on the scale. The analogue output signal
functions as described next.
Under Zero
When the gross indication drops below zero, the instrument reduces the
analogue output to 0mA or -4V to indicate the error.
Normal Range
The analogue output will reflect the gross value in the analogue output
as programmed (4 – 20mA, 0 – 20mA, 0 – 5V or 0 – 10V).
Over Range
When the gross value exceeds the high limit, the analogue signal
increases to approximately 24mA or 11V and remains there until the
weight display is no longer blanked or the analogue signal returns to
within range.
The following table indicates the analogue output value when the gross indication is out of the normal
range and when there is any error indication on the display. The error data indicated below can be used
to convey the errors to a connected PLC or computer.
Condition ( On Display )
4-20mA
output
0-20mA
output
0–5V
output
0–10V
output
The weight is more than the calibrated
capacity (Over Range)
24mA
24mA
5.5V
11V
The weight is less than the calibrated
zero (Under Zero)
0mA
0mA
-4.0V
-4.0V
Error [Err XX
24mA
24mA
5.5V
11V
The ADC is out of the operating range
[Adc Out]
24mA
24mA
5.5V
11V
Connection to the instrument for analogue output signals should be made to the I (for current), GND
and V (for voltage) terminals on the option card, located as indicated in 4.3, and as shown below.
Analogue output voltage connection (left) and current connection (right.