Time of Day Output. Symmetricom TimeSource 500

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Time of Day Output. Symmetricom TimeSource 500 | Manualzz

S S S S S S S S S S S S S S S S S S S S S S S S S S S S S

Time of Day Output

Connect a time of day (TOD) output at the female RJ-45 connector labeled TOD. See Figure 26 for the connector location, and Table C for the connector pinouts.

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Table C. TOD Connector Pinouts

Pin

1

2

3

4

5

6

7

8

1 pps A

1 pps B

Signal

12 V power source

Receive data B

Receive data A

Circuit ground

Transmit data A

Transmit data B

Abbreviation

TOD PPS +

Direction

From TimeSource 3500

TOD PPS – From TimeSource 3500

TOD P12V —

TOD RXD – To TimeSource 3500

TOD RXD +

TOD GND

TOD TXD +

To TimeSource 3500

From TimeSource 3500

TOD TXD – From TimeSource 3500

Note: Pins not listed are reserved for future use.

If the device receiving the time code (for example, Cisco router) accepts an RS-232 cable instead of an RS-422 cable, follow

Procedure G to install the RS-422–to–RS-232 TOD converter.

Note:

Before performing Procedure G, ensure that the appropriate Cisco router or NTP Type 4 compatible device is installed, and power applied, per manufacturer’s instructions.

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Procedure G. RS-422–to–RS-232 TOD Converter Installation

Step Procedure

1 Secure the provided mounting plate to the RS-422–to–RS-232 TOD converter, using the two provided screws. The plate may be attached to the top or front of the converter, depending on the desired surface (for example, a rack or cabinet) to which the converter will be mounted (see Figure 32).

Notes:

1. Due to distance constraints, the converter must be placed no more than

1000 ft from the TimeSource 3500 Shelf, and no more than 50 ft from the device receiving the time code.

2. The converter dimensions are 3 in. by 2.5 in by 1 in.

3. The mounting plate dimensions are 3 in by 2 in.

2 Secure the converter to the desired surface, using the slots in the plate and usersupplied bolts.

3 Install a user-supplied Category 5 four-pair RS-422 cable, with RJ-45 connectors on each end, between the TimeSource 3500 Shelf and the converter (see

Figure 33).

4 Install a user-supplied RS-232 cable, with DB-25 connectors on each end, between the converter and the device receiving the time code (see Figure 33).

See Table D for the DB-25 connector pinouts.

End of Procedure

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Figure 32. RS-422–to–RS-232 TOD Converter Mounting Plate

Screws

(supplied)

Mounting plate attached to top of converter

Mounting plate attached to front of converter

TOD

Converter

TOD

Converter

Screws

(supplied)

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Figure 33. RS-422–to–RS-232 TOD Converter Connections

DB-25

Connector

(Female)

To device receiving time code

50 ft max.

TOD

Converter

RJ-45

Connector

(Female)

1000 ft max.

To TimeSource

3500

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Table D. Converter DB-25 Connector Pinouts

Pin

1

3

5

Signal

Frame ground

Data output (RS-232)

1 pps (RS-232)

7 Signal ground

Note: Pins not listed are reserved for future use.

1

3

4

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