EXCEL 50 INSTALLATION INSTRUCTIONS
21
EN1B-0101
Phoenix Terminal Block Installation
IMPORTANT
The numbering of the Phoenix terminals differs com-
pletely from the screw terminal numbering which is
shown in the connection example figures. Translate
the terminal numbers from screw terminal blocks to
Phoenix terminal blocks according to Table 4.
1.
Mount Phoenix terminal blocks on DIN-rail as is shown
in Fig. 38.
Fig. 38. Mounting the Phoenix terminal blocks.
2.
Make sure that the power supply of the cabinet is
disconnected.
3.
Make sure that the application module is plugged in the
housing.
4.
Choose the minimum cross sectional areas for all
cables to and from sensors, actuators, valves, relays,
etc. you want to connect to the Excel 50 Controller from
Table 6.
5.
Connect sensors, transducers, etc. to the analog input
terminals.
Fig. 39. Connecting a cable to a Phoenix terminal.
IMPORTANT
When installing a separate external transformer, do
not connect the cabinet ground to the controller sys-
tem ground.
6.
If the distance between the controller and an actuator
or sensor with 24 Vac supply is greater than 550 ft (170
m):
a) Choose a transformer from the transformers listed
in chapter "Power Supply" (page 15).
b) Connect the chosen transformer directly to the
actuator or sensor.
7.
Connect sensors, transducers, etc. to the digital input
terminals.
8.
Connect valves, actuators, relays, etc. to the analog
output terminals.
9.
Connect relays, actuators etc. to the digital output
terminals.
10.
Select one of the transformers of the CRT series or
1450 series from Table 13 or Table 14 or take a
commercially available standard transformer fulfilling
the requirements from Table 15.
11.
Make sure that the application module is attached to
the controller housing.
WARNING
High voltage
Risk of death or electrical shock.
— Do not connect line power supply directly to the
terminals.
— Insulate devices with 120 Vac / 230 Vac by a
transformer.
IMPORTANT
The transformer feeding the Excel 50 Controller
must be in the same cabinet.
For the selection of the transformer, the max. DC
current must be considered if field devices with DC
load are used.
The secondary side of the transformer must not be
connected to earth ground.
12.
Connect the 24 Vac (-) on the secondary side of the
transformer with the system ground to all of the ter-
minals 19 to 22 on Phoenix Terminal block A.
13.
Connect the 24 Vac on the secondary side of the
transformer with the system ground to all of the ter-
minals 15 to 18 on Phoenix Terminal block A.
