Honeywell Enhanced Micro‑TDC‑3000 System Unit MX‑DTAC01K2

Enhanced Micro‑TDC‑3000 System Unit MX‑DTAC01K2

Generally, EMC Directive cabling on the LCN systems follow these rules:

• any cable exiting an enclosure is shielded

• cable shields are terminated at both ends of the cable to chassis ground

• metallic connector housings (back-shells) completely enclose the cable for contiguous

shield

• braid or braid over foil is used on coaxial cables

• foil is used as a sheild where applicable (on multi-pair cables).

1. Remove the rear center-section cover of both towers by removing four M5 flat-head

screws, exposing the EMC Directive I/O boards as shown in Figure 2-6.  Note that the

I/O boards have the face plates attached to the free edge of the board.  The face plates

are secured to the sheet metal module with screws.  The cards seen in Figure 2-6 are a

typical example for Tower #1.  Note some chassis slots are not used and have filler face

plates covering the board slot.  The cables from these board face plates to the transition

panels will have been installed at the factory.

Remove the rear center-section cover of both towers by removing four M5 flat-head

screws, exposing the I/O boards as shown in Figure 2-3.  The cards seen in Figure 2-3

are a typical example for Tower #1.  Note some connectors are not used and are only

outlined in Figure 2-3.  The cables from these card connectors to the transition panels,

shown in Figure 2-5. will have been installed at the factory.

Note there are two TP485 cards, in slots 1 and 9.  The TP485 in slot 9 of each tower

provides the TPLCN interface.  The TP485 in slot 1 in each tower provides the

connection, at J3 (see Figure 2-4), and interface for thermocouples that sense the

module’s temperature (non-EC Compliant modules only)

The standard cabling connections you will make in the following steps are on the

transition panels in Figure 2-5.  Note there are two exposed transition panels—one at

the top of the center section and another at the bottom (see Figure 2-5).  The panel has

connectors and cable clamps on it that will be used to secure cables you will install.

Both towers have the same locations for specific connector/clamp brackets but the

bracket types in certain locations may differ depending on the options installed.