Honeywell Excel 800 LION Installation And Commissioning Instructions page 77

Excel 800 LION
Example 2
Connecting an Excel 800 LION System together with other
controllers earth-grounded as per EN60204-1
Notes
• Use a noise-free earth ground inside the cabinet.
• Use one star-point to split power for controllers and field
devices.
• If the transformer is used for several controllers, each
controller ground has to be wired separately to the star-
point.
• If a field device that prohibits earth grounding is
connected to the system ground, an isolation monitoring
device must be used instead of earth grounding.
• If the field device transformer is physically far away from
the controller, earth grounding must still be performed for
the controller.
Connect earth ground to the respective terminal of the
►
controllers, see figure below.
Fig. 99 Connecting and earth grounding mixed
controllers (single transformer)
NOTICE
Equipment damage!
Terminals 1 and 2 are assigned differently on the XCL5010
and CLLIONLC01 Controllers.
Make sure that earth ground is connected to the correct
►
terminal according to Fig. 99 and the respective
connection diagrams.
The XL40, XL50, XL100C, Distributed IO, Smart IO, and the
Excel 800 LION System can share one transformer.
The XC5010C Controller always requires its own
transformer.
If EN60204-1 is applicable for the given type of controller,
the system ground has the same potential as one terminal
of the power supply.
Example 3
Connecting a C-Bus with controllers earth-grounded as per
EN60204-1
Notes
• Use a noise-free earth ground inside the cabinet.
• Do not use the controller terminals which are normally
used for C-Bus shield connection.
• Be sure to wire the shield only once per bus connection
to the earth ground; this is to prevent any current draw
over the shield.
• A permanent earth ground potential difference of more
than 24 VAC may destroy the related controllers.
Connect earth ground to the respective terminal of the
►
controllers, see figure below.
XCL5010C
C+ C-
15 16 17 18
Noise-Free Earth Ground
(only once per connection)
Fig. 100 Connecting C-Bus with multiple controllers earth-
grounded as per EN60204-1
If a system ground of the controller is connected to the earth
ground, the available terminals for shielding the C-Bus must
not be used. Instead, the C-Bus shield must be connected
to the earth ground, but only once per bus connection.
77
XCL5010 XL50
C+ C- C+ C-
4 5 6 4 5 6
max. 24 VAC potential
difference allowed
between Earth Grounds
EN1B-0375GE51 R0308
XCL8010A
C+ C-
SHIELD
8 9 10