MA-014 - TRANSFIX DGA 500 User Guide – Rev 1.1
13-Oct-15
Page 9 of 28
5
POWER
5.1
Introduction
The locations of the power supply terminals for the mains supply and the fuse holders
with modular fuses for the products are shown in Figure 5—1 and Figure 5—2
respectively.
Figure 5—1: DGA 500 (AC only) LED indicator lights &
fuse holder
Figure 5—2: DGA 500 Universal Power Supply LED
indicator lights & fuse holder
The product uses three external sunlight-visible LEDs on the front door. The LED states
are listed in Table 5—1.
Table 5—1: External LED status indicators
Mode
Alarm (red) LED
Caution (yellow) LED
Power/Service (green) LED
Power Off
-
-
-
Normal
-
-
On
Alarm
On
-
On
Caution
-
On
On
Service
-
-
Flashing
5.2
Cold Start
If the product is powered up in cold conditions (less than −10 °C), the internal heaters
automatically switch on to increase the internal temperature to within the PGA
operational temperature range before a measurement can commence. The main DC
power supply remains off until the working temperature reaches −10 °C, after which the
DC power supply is restored. The DC power indicator lights are situated on the circuit
board at the back of the product casing as shown in Figure 5—2.
Note: Once the DC power supply is restored, the internal temperature may take several hours to reach a
working temperature before a measurement cycle can begin.
24 V DC
LED
12 V DC
LED
Fuse
holders
for
mains input power
Fuse holders for mains
input power
24 V DC
LED
12 V DC
LED
