Omega LDP-124 manual Power SUPPLY, Recommended Wiring, Protection Fuses, Run time uncertainty

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8.- WIRING

8.1.- POWER SUPPLY, RECOMMENDED WIRING

Main switch

FUSE and spare fuse.

8.2.- PROTECTION FUSES

The unit has a protection fuse located on the power supply socket. If this fuse must be replaced or changed because the power supply is changed, use the time-lag fuse according to IEC 127/2 with the values indicated on the table.

POWER SUPPLY

115 Vac (230 Vac Optional).

Power

Fuse

Supply

value

 

 

230 Vac

0.2 A

115 Vac

0.4 A

 

 

TABLE 4

8.3.- CONTROL LINES, ALARM AND SERIAL OUTPUT

 

 

Control lines connector

 

Alarm connector

Serial RS422 connector

9

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A

1

6

 

 

 

 

 

 

 

 

 

 

B

 

 

 

 

 

 

C

5

9

15

8

 

 

 

 

 

 

 

 

 

 

 

D

 

 

 

 

 

 

1.-

Serial A.

1.-

Vexc.

 

 

 

9.-

Vexc.

 

2.-

Serial B.

2.-

Vexc.

 

3.-

No connection

3.-

Start

10.-

Stop

A : + Alarm

4.-

No connection

4.-

GND

11.-

Reset

5.-

GND

5.-

GND

12.-

GND

B : No connection

6.-

No connection

6.-

Minutes

13.-

Seconds

C : No connection

7.-

No connection

7.-

GND

14.-

Hours

D : - Alarm

8.-

No connection

8.-

No connection

15.-

GND

 

9.-

No connection.

8.4.- NOTES

The HOURS, MINUTES & SECONDS inputs are for contact closure to GND, and are pulled up to the auxiliary 15 volt rail through 4.7 KΩ .

The STOP, START and RESET inputs are normally configured to be pulled up to the auxiliary 15 volt rail through 1 KΩ, but may be internally jumpered to be pulled to GND through 1 KΩ , or pulled to GND through a high resistance of 100 kΩ .

Debouncing for 200 mS time constant is normally incorporated on the three control inputs, but may be disabled by removing internal jumpers.

Vexc is the Excitation Voltage for sensors supplied by the instrument (pins 1, 2 & 9). The connections to Serial A, Serial B and GND are for the RS422 data output.

Run time uncertainty

The control inputs are sensed eight times per second, but the actual run time clock is incremented or decremented in synchronism with the built in real time clock once per second.

This means that each start/stop condition may be inaccurate by up to one second.

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Contents Users Guide USA Contents Precautions Important Safety ConsiderationsSafety Prescriptions PrescriptionsMain Features ENGINEERING´S customer service departmentUnpacking and Inspection Model LDP-1XX-C1. Display time using the format HH MM ResetModels ConnectionsGeneral Specifications Rear VIEW, Description for all series Front VIEW, DescriptionPower SUPPLY, Recommended Wiring WiringControl LINES, Alarm and Serial Output Protection FusesPOWER-UP and Operation Excitation Voltage for SensorsRUN Time Clock Configuration DIP Switch Configuration DIP Switch and Jumpers LocationControl Board Position Display brightness tableSerial Data Output Configuration Jumpers ConfigurationMechanical Dimensions mm inches InstallationAppendix 1 Model LDP-1XX-CX AS Slave Repeater Configuration OptionsFunctional Description OperationIt is advisable to make the TIME-NET connections as follows MasterSlave Return REQUESTS/INQUIRIES WARRANTY/DISCLAIMERPRESSURE, Strain and Force TemperatureFLOW/LEVEL Data Acquisition