Lathem LTR-512 User Manual download pdf (Page 49)

LTRx-512 Installer’s Guide

Wiring Diagrams

Fig. D5 - SYNCHING UP TO 60 RS-485 TIME SYNC DEVICES

WITHOUT A BUFFER

1 2 3 4 5 10 11 12 136 7 8 9

TxD RxD

RS-232

RS-485

SYNC

OUT

SYNC

12V~

OUT

250ma

MODEM

HOST COMMUNICATIONS

LTR8-512 & LTR8-512M Only

PULSE

SYNC

RS-485

DATA SYNC

RS-485

DSD

RS-485

DSD

RS-485

DSD

RS-485

DSD

RS-485

DSD

RS-485

DSD

+ -

Notes: Up to 30 RS-485 Data Sync Devices (DSDs) can be connected to the Data Sync port. Since the SYNC IN

port can send as well as receive, 30 extra devices can be connected. If more than 60 DSDs are to be

connected, another Master Clock will have to be used as a “Booster”.

Fig. D6 - LTRx-512 USED AS SLAVE TO ALLOW 30 EXTRA RS-485

TIME SYNC DEVICES

MASTER

CLOCK

1 2 3 4 5 10 11 12 136 7 8 9

TxD RxD

RS-232

RS-485

SYNC

OUT

SYNC

12V~

OUT

250ma

MODEM

HOST COMMUNICATIONS

LTR8-512 & LTR8-512M Only

PULSE

SYNC

RS-485

DATA SYNC

+ -

RS-485

DSD

RS-485

DSD

+ -

RS-485

DSD

+ -

RS-485

DSD

+ -

RS-485

DSD

+ -

Note: Since the Sync In port can send as well as receive, 30 extra devices can connect here. If you already have a

Master Source, such as an LTR-0, connect it and its string of clocks to the Sync In port, for a total of up to

60 devices.

Ports are located on the

back of the Display Unit

Ports are located on the

back of the Display Unit

1 2 ... 44 45 46 47 48 49 50 51 52 53 54 ... 61 62

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Lathem LTR-512 User Manual Page 49

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