E36.0.01.6C-01
Installation and
Operating Manual GIA 0420 … - ex
page 7 of 20
4
Electric connection
4.1
GIA … WK(T) - ex
The connection of the GIA ... WK - ex occurs via 2- or 4-wire connection cable.
Supply voltage:
device takes power from measuring current
Electric connection and commissioning of the device must be carried out by trained and skilled personnel.
Wrong connection may lead to the destruction of the display device, in which case we cannot assume any warranty!
! Mind the maximum input current rating of 40mA under any circumstances !
4.1.1 Terminal assignment
connection
number
wire colour
GIA 0420 WK(T) - ex
GIA 0420 WK(T) - ex / S1
(with switching output)
1
white
2
brown
signal -
signal -
3
green
---
switching
4
yellow
---
switching output -
4.1.2 Connection example for optionally switching output:
Please note: The max. permitted voltage and switching current of the switching output must not be exceeded (even
not for a short time).
Attention: The measuring and switching branches have to be supplied by the same intrinsically safe current
circuit. The total capacity and inductivity of GIA..., intrinsically sage transducer, intrinsically safe
switching device and cabling have to meet the limit values of the supply device.
Example for permitted connection values of switching devices/cabling if the universal isolating amplifier
ST 500 Ex - 10 - ..
and the 4-20mA transducer
IS-20 S
or
GITT 01 - ex
is used:
Connection values of the ST 500 for ia/IIC: Co = 47 nF, Lo = 2 mH
for ia/IIB: Co = 370 nF, Lo = 15 mH
Pressure transmitter
IS-20 S
Temperature transmitter
GITT 01 - ex
Connection values transmitter:
Ci < 22 nF, Li = 0 mH
Ci = 0 nF, Li = 0 mH
Remaining values for
switching device/cabling if
GIA 0420
is used:
for ia/IIC: Ci < 7.5 nF
(47 nF
– (13 + 4.5 + 22) nF)
Li < 2 mH
(2 mH
– (0 + 0) mH)
for ia/IIB: Ci < 330 nF
(370 nF
– (13 + 4.5 + 22) nF)
Li < 15 mH
(15 mH
– (0 + 0) mH)
for ia/IIC: Ci < 29.5 nF
(47 nF
– (13 + 4.5 + 0) nF)
Li < 2 mH
(2 mH
– (0 + 0) mH)
for ia/IIB: Ci < 352 nF
(370 nF
– (13 + 4.5 + 0) nF)
Li < 15 mH
(15 mH
– (0 + 0) mH)
4.1.3 GIA 0420 WK(T) - ex / S1: Switching of a alarm device
