Table of Contents
Advertisement
SD39RIO-1
To install the module end of an I/O cable:
1. Feed the I/O cable end up into the Remote I/O Rack through the bottom opening.
2. As shown in Figure 2-30, tilt the I/O cable's top connector edge into the rack's spacer groove and then
pivot the connector down so it engages the alignment pin on the rack's chassis and protrudes through the
connector cutout in the rack's chassis.
3. When the connector is properly seated, secure it to the rack with its captive mounting screw.
2.13 Module and Rack Keying
Each module slot in the Remote I/O Rack must be mechanically keyed to assure only a specific type of
module can be plugged into a given slot. Keying creates a physical interface between a specific slot in the
rack and a specific type of I/O module. Keying is performed on the top and bottom of the rack's bezel at each
slot position. Keying is highly recommended since it enhances system safety and aids in preventing
equipment damage.
Generally, modules are keyed at the factory. The keying pattern is unique to each module type (e.g., Standard
Analog Module, Critical Analog Module).
Each Remote I/O Rack involved in the factory staging of a system is keyed at the factory. The installer must
key racks not keyed at the factory. Each slot must be keyed according to the module type assigned. Keying is
performed with keying pins and stop plugs. Keying pins are supplied with the module while stop plugs are
supplied with the rack.
When adding a module to a Remote I/O Rack, be sure to key its slot at installation time.
The specific keying pattern for a slot is detailed in the module's documentation. For example, to key a slot
for a Critical Analog Module (CAM), look up the necessary keying pattern in the CAM's Installation and
Service Instruction.
The details in Figure 2-31 show how keying is implemented between an I/O module and a Remote I/O Rack.
A variation of this image is provided in the documentation for each module.
January 2001
INSTALLATION
#
2-41
Advertisement
Table of Contents
