Honeywell ControlEdge 900 platform Hardware Planning And Installation Manual page 101

Terminal blocks have an embossed numbering "key" that shows the
numbering pattern of the 20/36 connections.
The frame associated with the terminal block has a transparent
hinged door. The hinged door is a tool secured cover. To open the
door, insert a flat screwdriver into the slot at the top and bottom of
the door while pulling out. The door has molded-in tabs that hold
labels, which are uniquely color-coded to identify each module type.
Each label is printed on both sides. On the front (visible when the
door is closed) are I/O channel numbers, with spaces in which tag
names can be written. On the back (visible when the door is open) are
wiring patterns for the type of module located in the slot.
The 20-pin, inline connectors at the back of the terminal blocks are
universal; that is, any type of I/O module can be used with either the
Barrier style or the Euro style terminal block. The 36-pin Euro
terminal blocks must be used withHigh Level AI, 32 DI, and 32 DO
modules.
ATTENTION:
Before mounting terminal blocks in the rack, be sure they are
properly keyed to the module type they will be used with. Before
mounting terminal blocks in the rack, be sure they are properly
keyed to the module type they will be used with. For more
information, see Installing I/O modules section.
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