Installation Guidelines; Bus Connection Lines; Grounding And Shielding When Installing In A Separate Housing - Honeywell IB2 Mounting And Connection Instructions

16
5.

Installation guidelines

5.1

Bus connection lines

The BUS connecting cable must be a shielded, twisted pair line. Wires must correspond with the
diagram below. The corresponding line cross-sections can be found in the installation instructions of
the intruder alarm control panel (see "Lines").
Connect the shield in the housing to the shield connection bar. Keep the shield connections as short
as possible to avoid the risk of a short circuit.
BUS-2
+12 V DC
0 V
B
A / Data
Shield
5.2

Grounding and shielding when installing in a separate housing

When installing the module in a separate housing,
twisted pair cable (see above).
The shielding is connected on one side to the shield terminal bar in the panel.
• The shielding of the incoming BUS cable is not connected.
• The shielding of the outgoing BUS cable is connected to the shield terminal bar of the housing.
• The shield terminal bar in each housing must be connected to a separate PE.
Panel
shield
terminal bar
PE
Mounting and Connection Instructions IB2 Bus Expander
+12 V DC
Shield
the devices are daisy chained via a shielded
16 I/O module
BUS connecting
cable
connected
not connected
IB2 BUS / RS-485
0 V
B
A
shield
terminal bar
PE
to the next
BUS user
connected