Omron DDAA1000/SRM manual Discrete Operation, Connections

Page 7

DDAA1000/SRM User Guide

Discrete Operation

Requirements

1.The outputs of the units cannot directly drive a relay. The digital outputs are open collector current sinking to the common ground. An external power supply must be used to provide DC power to any relays.

2.The maximum voltage on the relay driver outputs is 24 VDC.

3.Ensure that the pull up voltage is sufficient for your relay. i.e. a 12 VDC relay needs 12 VDC, a 24 VDC relay needs 24 VDC.

4.Each digital output can sink up to 100 mA for the purpose of controlling the relay coil.

5.If driving inductive loads, place a voltage suppression diode across the relay coil.

6.There is one common ground for all input and output connections.

Connections

The discrete connection to the device is made via the terminals labeled “Contact Closure Input” and

“Contact Closure Output.” The digital input expects a dry contact, such as a switch or even just a jumper wire.

The output is open collector. The following diagram illustrates the output drive circuit connection for a discrete unit.

Figure 3: Simplified Open Collector

DDAA1000

Output

Customer

Supplied

Relay

Output 1,2,3...,8

Common

+ -

DC Supply

PN 161-09981-002C

rev 8/04

DATA-LINC GROUP

5

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Contents DDAA1000/SRM Product User Guide FCC NotificationTable of Contents DATA-LINC Group DDAA1000 and DD1000 IntroductionAntenna Connectoin Type Power ConnectorTeminal Block Connections Discrete OperationMaster Remote Point-to-Point Discrete OperationMaster Point-to-Multipoint Discrete OperationNeeded. The DDAA1000 unites do not Supply loop powerAnalog Operation Point-to-Point Analog SystemMaster or Remote Connection of a flow meter to the DDAA1000/SRM unitPoint-to-Multipoint Analog System Factory Configuration ProcessPoint-to-Multipoint Analog Example Remote Point-to-Multipoint Analog OperationLayout Drawing Changing System or Radio ConfigurationsTechnical Specifications Troubleshooting Contact Information Product WarrantyReturn Material Authorization Technical SupportTOP Appendix aAppendix B DDAA1000 DD1000 ConfigurationDATA-LINC Group Ddaa Eeprom MENU** *SET Caplck DATA-LINC Group Terminal Settings Appendix C Radio ConfigurationMain Menu Point-to-Multi-Point Master Main Menu Option 0 Set Operation ModePoint-to-point Master Point-to-Point RemotePoint-to-Multi-Point Repeater Point-to-Point Remote/Master SwitchableDDAA1000/SRM User Guide Point-to-Point Remote/Repeater Point-to-Point RepeaterAvailable data word length and parity selections Main Menu Option 1 Set Baud RateModBus RTU Call Book Menu Main Menu Option 2 Edit Call BookEntry Number Repeater 000-0000 Edit Call Book in Multi-Point SystemsFreqKey Main Menu Option 3 Edit Radio Transmission CharacteristicsMax Packet Size and 2 Min Packet Size Selections Maximum Packet Size Settings where RF Data Rate=3 DDAA1000/SRM User Guide Minimum Packet Size Settings bytesRF Data Rate Xmit RateRTS to CTS DDAA1000/SRM User Guide RF Xmit PowerPower Transmit Settings Remote SecurityHigh Noise DDAA1000/SRM User Guide Lowpower ModeMCU speed Overall Rcv Rate % Average Signal LevelMain Menu Option 4 Show Radio Statistics Average Noise LevelDDAA1000/SRM User Guide Number of Disconnects Radio TemperatureMulti-Point Operation Multi-Point Parameters Main Menu Option 5 Edit Multi-Point ParametersRadio ID DiagnosticsRemote/Repeater SubNet IDMain Menu Option 8 Password Disabling Password Changing a PasswordDDAA1000/SRM and DD1000/SRM Placement Locations