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Comtech EF Data RCU108 User Manual

Page 15

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RCU108 1:8 Protection Switch

Installation

TM066 - Rev. 1

Page 2-5

4

IDB4

ID Bit 4

8

INT O

Interrupt

12

RMT

The ID Bits provide information to the converter that tells the converter which slot (either primary
or backup) the converter is plugged into. The addresses are as follows:

IDB4

IDB3

IDB2

IDB1

Position

1

0

0

1

Backup

X X X X Primary Where: XXXX = 1 through 8

and

also

identifies the slot to which the primary is
connected.

2.4.2

Switch Fault/Status Connector (J6)

The RCU108 Redundancy Control Unit contains a summary Fault/Status connector that is
available to the equipment operator for the purpose of monitoring the summary fault status of all
converters. The pinouts of this 15-pin D Sub connector are as follows:

J2 D sub

15

J6 D sub 15

Description

1

1

Converter Summary Status N.O.

2

9

Converter Summary Status Common

3

2

Primary/Backup Summary Fault Relay Common

4

10

Backup Summary Fault Relay N.O.

5

3

Primary #2 Summary Fault Relay N.O.

6

11

Primary #4 Summary Fault Relay N.O.

7

4

Primary #6 Summary Fault Relay N.O.

8

12

Primary #8 Summary Fault Relay N.O.

9

5

Converter Summary Status N.C.

10

13

Ground

11

6

ACC (Do not apply Voltage)

12

14

Primary #1 Summary Fault Relay N.O.

13

7

Primary #3 Summary Fault Relay N.O.

14

15

Primary #5 Summary Fault Relay N.O.

15

8

Primary #7 Summary Fault Relay N.O.

16

N/C

2.4.3

Up/Downconverter Equipment RS485 Port (J1)

An equipment multi-drop, full-duplex, bi-directional RS485 Interface allows communication
between converters. Because the RS485 interface uses a master/slave (talker/listener)
configuration, the converter that is designated the backup converter will automatically be
established as the master. Under normal RS485 protocol, the master will poll a specific slave
by address and only then will the slave unit respond. The swapping of Transmit Data and
Receive Data is accomplished in the inter-converter cable (CA/3563) as the hardware interface
is identical for all converters.