Table of Contents
Advertisement
...5 ELECTRICAL INSTALLATION
5.1.3 Model 4234 Power Supply Unit – Fig. 5.6
Warning. Do NOT connect mains supply to the power supply unit with the output terminals on open circuit.
Caution. Ensure that the power supply unit is correct for the mains supply voltage available. A nominal 115 V unit
cannot be adapted for use with a nominal 230 V supply, or the other way around.
Remove the cover of the unit to gain access to the terminal blocks inside.
Locate the terminal block (TB1) adjacent to the transformer T1 and ensure the correct transformer tapping is used for the incoming
mains supply, i.e.
link from tapping 6 to 10 for 230 V, or
link from tapping 8 to 10 for 115 V.
Make electrical connections in accordance with the information given in the wiring diagrams Figs 5.1 and 5.3 and Section 5.2.1.
The electrical connections are made at terminal blocks TB1 and TB2 through the appropriate cable gland, or any replacement gland
to suit intrinsically safe wiring requirements. Secure the incoming cable by the cable clips adjacent to the terminal blocks.
Replace the cover when wiring is complete.
Warning. Hazardous Voltages
There are no servicable parts in this unit.
Please return to the manufacturer if faulty, or
seek the services of a qualified engineer.
Ensure that the mains supply is switched off
and disconnected before removing the cover
for any reason.
Output Current (mA)
Links
350
C to X
NO connections should be made to
points A, B D or E
*Refer to the 4234 manual for fuse details.
Fig. 5.6 Location of Components Inside Case – Model 4234 Power Supply Unit
18
M5 Earth Stud
6
230 V
8
T1
115 V
10
L
F2 F3
Cable Gland for
Mains Input
a.c. Mains Input
Terminal Block
d.c. Output
Fuses*
Terminal Block
F1
TB2
TB1
C
N
E
B
Output
Current
Links
Cable Gland for
d.c. Output to
Katharometer
E
D
X
Cable Gland
A
not used
Advertisement
Table of Contents
