PTE-300-V
Sheet 27
•
Line
: the reference is the main voltage supply.
•
Bus
: the reference is another PTE unit connected via BUS-PTE. Normally the
PTE-300-V or PTE-100-V. If the led is flashing there is no reference in the BUS.
•
Ext
: the selected reference is taken from another instrument or equipment
connected in the external reference tap. If the led is flashing there is no valid
reference.
3.4.2.3. Monitor state indicator
This is a 3 mm red LED, located above the
Monitor
taps. When it is on, indicates that the
Monitor
is ACTIVATED. When it is off, indicates the
Monitor
is DEACTIVATED.
3.4.3. CONNECTORS AND FUSES
3.4.3.1. Monitor input taps
These taps are located in the lower right hand part of the unit and consist of three, 4 mm female
connectors. These taps receive the input signals to the unit.
•
Black tap (0): this is the common tap
•
Red tap: any DC or AC voltage between 5 and 250 V can be connected between the
common tap (0) and this one. The presence of voltage will activate the
Monitor
.
•
Green tap: between this tap and the common a DRY CONTACT can be connected. A close
contact will activate the
Monitor
.
Both inputs are protected by fuses, fast characteristic, 0.1 A.
The
Monitor
signal fuses are situated to the left and to the right of the monitor taps. The fuse on
the left protects the voltage-input tap and the fuse on the right protects the free contact input tap.
To remove the fuse, turn the cap anti-clockwise. These are fast fuses, 5x20 mm, 0.1 A.
Figure 11:
Signal Monitor
3.4.3.2. Auxiliary output to start an external timer
This is a BNC connector that delivers a “close contact” signal of 20 ms duration, with
the main objective to start an external timer. This output will be active each time one of
the following occurs:
