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Cable connections for redundant system operation – Comtech EF Data DT-4500 Series User Manual

Page 41

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DT4500 Series Down Converters

MN/DT4500.IOM

Installation

Revision 1

23

Power

Supply

Reference

Oscillator

Fine
Step

Module

Sum

Loop

Module

Monitor & Control Assembly

Receive

I/O Switch

Module

RF Converter

Prime Power Cord Input

5/10 MHz Ref. Osc. Input

J2

P1

J1

J3

J4

J6

J8

J5

J7

J9

Summary Fault Relay Output

Serial Comm. Interface
(EIA-485 / EIA-232C)- COM 1

High Speed Bus (HSB)

IF Output (IF)

IF Loop Input (LP IN)

IF Loop Output (LP OUT)

RF Input (RF)

(Not Used)

(Not Used)

Figure 6. Cable Interconnect Diagram

2.4.5 C

ABLE

C

ONNECTIONS

F

OR

N

ON

-R

EDUNDANT

S

YSTEM

O

PERATION

In non-redundant converter configuration the converter has an Input/Output Module
(IOM-XX) for the RF input and the IF Output. A converter with a Transmit or Receive
Switch Module may be operated in a non-redundant configuration if an IOM is
unavailable. Figure 7 is an illustration of the converter cable connections with an IOM
installed. Figure 8 is an illustration of the converter cable connections with a TSM
installed.

2.4.6 C

ABLE

C

ONNECTIONS

F

OR

R

EDUNDANT

S

YSTEM

O

PERATION

In subsystems where a redundant converter configuration is used, the backup Converter
has an Input/Output Module (IOM-XX) and the online converters have Receive Switch
Modules (TSM-XX), which switch to the backup Converter when a fault is detected.
Redundant system operation is discussed in Appendix A, Redundant System Operation.

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