EXCEL 50 INSTALLATION INSTRUCTIONS
EN1B-0101
20
Screw Terminal Block Installation
1.
Make sure that the power supply of the cabinet is
disconnected.
2.
Make sure that the power supply of the cabinet is
disconnected and the application module is plugged in
the housing.
3.
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.
4.
Connect sensors, transducers, etc. to the analog input
terminals.
Fig. 35. Connecting a cable to a screw terminal.
IMPORTANT
When installing a separate external transformer, do
not connect the cabinet ground to the controller
system ground.
5.
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".
b) Connect the chosen transformer directly to the
actuator or sensor.
6.
Connect sensors, transducers, etc. to the digital input
terminals.
7.
Connect valves, actuators, relays, etc. to the analog
output terminals.
8.
Connect relays, actuators etc. to the digital output
terminals.
9.
Select one of the transformers of the CRT series or
1450 series from the Table 13 or Table 14 or take a
commercially available standard transformer fulfilling
the requirements from Table 15.
10.
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.
11.
Connect the 24 Vac (-) on the secondary side of the
transformer to terminal 1 on Screw Terminal block A.
12.
Connect the 24 Vac on the secondary side of the
transformer to terminal 2 on Screw Terminal block A.
Fig. 36. Connecting the power supply.
IMPORTANT
If there already are additional transformers, for
example supplying actuators or active sensors:
— Connect the 24 Vac (-) (secondary side) of the
transformers together.
13.
Attach the terminal blocks to the housing as is shown in
Fig. 37.
Fig. 37. Attaching of screw terminal blocks.
