Attaching Panel Circuit Modules Section 3 Installation
NFS-3030 Installation PN 51330:C 10/28/2003 25
3.7.3 Installing a Multi-layer Module into the Chassis
Follow the instructions illustrated in Figure 11 to install a panel circuit module or a pair of loop control/
expander modules into into CHS-4N or CHS-M3.
NOTE: Loop control/expander modules can also mount in CHS-4; see Figure 25.
1. Angle the module into the chassis so that the upper end of the rear board (or boards) fits into the top
slot.
2. Bring the module back down so that the lower board edges slip into the bottom slots.
3. Secure the module to the chassis with the two module screws. Tighten securely.
4. Connect the ribbon cable to the module.
Figure 11 Inserting a Two-Layer Module into CHS-4N or CHS-M3 Chassis
Note: Depending on system components, clearance may be tight. Do not force modules! Move the
assembly around gently until you find the angle where components and mounting studs pass each other
without scraping together.
voice-mount-mod.cdr
Chassis
Module
Screw
Top
Slot
Bottom
Slots
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