Intercom System

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Unpacking and Installation, TWTA Octagon CPU

MNC-0300-003 22 of 22 Revision N

Table of Contents

Table of Contents2
Unpacking and Installation, TWTA Octagon CPU5
Unpacking and Inspection5
Unpacking5
Inspection5
Mechanical Installation5
Waveguide Connection6
Figure 1, Typical 4 Screw Mounting Flange Tightening Sequence8
Figure 2, Typical 8 Screw Mounting Flange Tightening Sequence8
Air Ducting Installation9
Power and Interface Interconnections10
Prime Power Connections10
Figure 3, Connector J2 Pinout for Standard Unit10
External Interlock (Prime Power Enable)11
Figure 4, Connector J2 Pinout for EIK Unit11
Figure 5, MS Connector J2 Pinout11
Figure 6, Prime Power Enable Circuit11
Monitor and Control Connector12
Monitor and Control Pinouts12
Figure 7 , M&C Connector Pin Layout12
Redundancy Interface (Waveguide Switch) Connector (J6)14
RF Inhibit Control (J1-Y)15
Figure 8, Waveguide Switch Connector Pinouts15
Figure 9 , RF Inhibit with Internal Source15
Figure 10, RF Inhibit with External Source16
Serial Interface Ports (J1-A to J1-R)17
Figure 11, RF Inhibit with Switch a Open17
Figure 12, Typical RS-485 2-Wire Duplex Implementation18
Figure 13, Typical RS-485 4-Wire Full Duplex Implementation18
Summary Fault Indicators (J1-S to J1-X)19
Output Voltages19
Hardware Address Select (J1-D)19
High Voltage on Indicator (J1- E)19
Grounding19
Local Operation20
Operating Procedure20

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