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

4.2.2 Access to Terminals – Fig. 4.1
Caution.
Both front panels are held in position by the front
panel screws only and are not otherwise captive.
When removing the panels, ensure they are
adequately supported.
1
Unlock and remove the
lower panel from the
front of the instrument
– see Fig. 3.1
2
Undo the two retaining
screws and remove the
terminal shroud.
Fig. 4.1 Access to Terminals
MAINS
Earth Stud
E
Incoming
Power Supplies
RELAY RELAY
1 2
N L N/C C N/O N/C C N/O
3
1
Relays
Retransmission
Note. Cable core colour is dependent on cable type – see Table 4.2
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 –
HEATER
RTX
DRIVE
CELL
+ - + -
H H E
Not Used
2
Spare

4 CONNECTIONS...

red to 'CELL +'
blue to 'CELL –'
screen to 'CELL SCR'
see Table 4.2
T/C
+ -
SCR
Probe (Signal)
4
7