I/O Module Installation and Wiring - Module Placement in Racks
Terminal Block Styles
The terminal block is available in the barrier style, shown at left in
Figure 26, and the Euro style, shown at right.
Both styles of terminal blocks have an embossed numbering "key" that shows the numbering pattern of the 20 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 tagnames can be written. On the back (visible when the door is open) are wiring patterns for the type of module located in the slot.
Figure 26 - Terminal Block Styles
The
ATTENTION
Before mounting terminal blocks in the rack, be sure they are properly keyed to the module type they will be used with. See I/O Installation Procedures, page 63.
Terminal Block Colors and Keying
Both the barrier style and the Euro style are available in two colors (red and black). Black terminal blocks, which have
Colors of each Terminal Blocks must correlate to that of the mating header on I/O modules with which they are used; that is:
•Black terminal blocks, which have
•Red terminal blocks, which have white (tin) contacts, are for use with I/O modules that have red headers and white-
•Terminal blocks may be keyed by the installer to prevent high voltage terminal blocks from being installed on low voltage modules. See Table 14.
Any of the
58 | HC900 Hybrid Controller Installation and User Guide | Revision 5 |
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| 9/03 |