Honeywell Excel 800 Installation And Commissioning Instructions page 44

Appendix 1: System Protective Earth Grounding
Power Supply and Earthing of XCL8010 with
Multiple Controllers
Connecting an Excel 800 System together with other
controllers earth-grounded as per EN60204-1.
NOTE: Use a noise-free earth ground inside the cabinet.
NOTE: Use one star-point to split power for controllers
and field devices.
NOTE: If the transformer is used for several controllers,
each controller ground has to be wired separately
to the star-point.
NOTE: 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.
NOTE: 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.
XCL5010 XSL511
24 24 24 24
V~ V~0 V~ V~0
2 1 2 1
24 V~
LINE
24 V0
NOISE-FREE EARTH GROUND
(ONLY ONE PER SYSTEM)
Fig. 59 Connecting and earth grounding mixed
controllers (single transformer)
NOTICE
Equipment damage!
Terminals 1 and 2 are assigned differently on the XCL5010
and XCL8010 Controllers.
Make sure that earth ground is connected to the correct
►
terminal according to Fig. 59 and the respective
connection diagrams.
The XL40, XL50, XL100C, Distributed IO, Smart IO, and the
Excel 800 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.
EN1B-0375GE51 R0315
XL50 XL100C XCL8010
24 24 24 24 24 24
V~ V~0 V~ V~0 V~ V~0
2 1 71 72 1 2
24
V~
FIELD
Y
DEVICE
GND
XCL8010 and Multiple Controllers, Connected by C-
Bus
Connecting a C-Bus with controllers earth-grounded as per
EN60204-1.
NOTE: Use a noise-free earth ground inside the cabinet.
NOTE: Do not use the controller terminals which are
normally used for C-Bus shield connection.
NOTE: Be sure to wire the shield only once per bus con-
nection to the earth ground; this is to prevent any
current draw over the shield.
NOTE: A permanent earth ground potential difference of
more than 24 VAC may destroy the related con-
trollers.
Connect earth ground to the respective terminal of the
►
controllers, see figure below.
XCL5010C XCL5010
C+ C- C+
15 16 17 18 5
NOISE-FREE EARTH
GROUND (ONLY ONE
PER CONNECTION)
Fig. 60 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.
44
Excel 800
XL50 XCL8010
C- C+ C- C+ C-
SHIELD
6 5 6 8 9 10
MAX. 24 V POTENTIAL
DIFFERENCE ALLOWED
BETWEEN EARTH GROUNDS