E36.0.01.6C-01
Installation and
Operating Manual GIA 0420 … - ex
page 5 of 20
2.5 Ex protection
1. The device may be connected to approved intrinsically safe circuits with the following maximum values:
GIA 0420 … - ex:
Ui = 28 V DC
Ii
= 100 mA
Pi = 1.2 W
Ci < 13 nF
Li
= ~ 0 µH
Additional for the switching output
(only at option “switching output”)
Ci < 4.5 nF
Li
= ~ 0 µH
3
Product description
3.1 Scope of supply
display device
each 1 erection crew M3 x 68, M3 x 75 (only for GIA ... VO)
mounting and operating manual
3.2 Function description
The GIA 0420 VO(T) - ex and GIA 0420 WK(T) - ex are microprocessor controlled display devices.
GIA … VO - ex
GIA … VOT - ex
GIA … WK - ex
GIA … WKT - ex
The different design types of the device have an input for:
- standard signal 4
– 20 mA
The measuring value is displayed on a 4-digit LCD display with max. display area ranging from -1999 to +9999 digits.
The device optionally features a switching output (NPN-output) which can be configured as 2-point controller or min-
/max alarm. The state of the output is displayed with an arrow at the LCD.
The GIA 0420 … is designed for the connection of any measuring transducers (with a 4 to 20 mA output).
This design type doesn't need an auxiliary supply as it is supplied by the measuring current.
Parameter and limit values are entered via three keys which are accessible after removal of the cover (design type VO
and WK).
Devices of the design type VOT and WKT have that keys freely accessible at top of the device.
The operating range of the display device can be directly adjusted to the transmitter without any additional
accessories by simply entering the maximum and minimum measuring range limits as well as the decimal point
position.
All programmable parameters of the device are saved in an EEProm. In case of a current failure they will remain there
for at least 10 years. The device is equipped with a self-diagnosis system continuously monitoring the essential parts
of the device for their perfect functioning. Both the self-diagnosis and the measuring sensor monitoring for values
exceeding or falling below permissible limits ensure maximum operational reliability of the device.
However, prior to you starting your operation make sure to configurate the device for your application.
Please also refer to chapter "Configuration".
