Access To Terminals; Connections - ABB ZDT–FG Series Installation And Operating Manual

4.2.2 Access to Terminals – Fig. 4.1
Unlock and remove the
1
lower panel from the
front of the instrument
– see Fig. 2.1
Remove the two
2
screws retaining the
terminal shroud and
remove.
Fig. 4.1 Access to Terminals
MAINS
Earth Stud
E
Incoming
Power Supplies
Note. Reference Air
Connection – see Section 4.5.
RELAY RELAY
1 2
N L C C
N/C N/O N/C N/O
3
1
Relays
Retransmission
A – Twin-conduit Probes
B – Single-conduit Probes
Fig. 4.2 Electrical Connections
4.2.3 Connections – Fig. 4.2
1 Mains:
Live to 'L'
Neutral to 'N'
Earth to 'E'
2 Retransmission Output (4 to 20mA):
Positive to 'RTX +'
Negative to 'RTX –'
3 Relay outputs 1 and 2
'N/C' – normally closed
'C' – common
'N/O' – normally open
4 Secure the probe conduit fitting in the appropriate gland
and make the following connections:
Cell output –
Thermocouple –
Probe heater –
HEATER
RTX
DRIVE
CELL
+ - + -
H H E
2
Probe (Power)
4
HEATER
DRIVE
CELL
+ -
H H E
Spare

4 CONNECTIONS...

red to 'CELL +'
blue to 'CELL –'
screen to 'CELL SCR'
white to 'T/C +'
blue to 'T/C –'
Live to 1 st 'H' terminal, Neutral to
2 nd 'H' terminal (Polarity
unimportant). Earth to 'E'
T/C
+ -
SCR
See
Note
Probe (Signal)
T/C
+ -
SCR
See
Note
to Probe
(Signal, Power and Air)
4
7