Installation

3.3 Alarms and Relays

The controller is equipped with three unpowered relays rated 100–230 V ac, 50/60 Hz, 5 amp resistive maximum. See the sensor manual for relay setup details.

3.3.1 Connecting the Relays

Danger: Relay loads must be resistive. User must externally limit current to the relays to 5 Amps by use of a fuse or breaker.

Danger: ac power terminals are designed for single wires. Do not use more than one wire in each terminal.

The relay connector accepts 18–12 AWG wire (as determined by load application). Wire gauge less than 18 AWG is not recommended.

The controller contains three relays designed for use with high voltage (greater than 30V-RMS and 42.2V-PEAK or 60 V dc). Refer to Figure 3-17for connection information. The wiring is not designed for low voltage connections. Relay must not be powered from the same wiring used to power the controller. See the sensor manual for relay setup details.

The Normally Open (NO) and Common (COM) relay contacts will be connected when an alarm or other condition is active. The Normally Closed (NC) and Common relay contacts will be connected when an alarm or other condition

is inactive or when power is removed from the controller.

Figure 3-17 Alarm and Relay Connections

S1

J4

J1

 

J3

 

 

 

 

 

J5

 

J2

 

 

 

 

 

 

 

 

 

 

 

 

 

1 2 3

 

 

 

 

 

 

 

U5

 

 

 

 

 

 

 

 

 

 

 

F1

F2

RELAY A

 

J5

 

 

 

 

 

 

 

U9

 

 

 

 

 

 

NETWORK

NC COM

NO

NC COM

NO

NC COM

NO

 

INTERFACE

 

RELAY A

 

RELAY B

 

RELAY C

 

 

CARD

 

 

 

 

 

 

 

 

J6

 

 

 

 

 

 

J6J7

RELAY B

RELAY C

Disconnect

Power

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Hach sc100TM installation manual Alarms and Relays, Connecting the Relays, Disconnect Power

sc100TM specifications

The Hach sc100TM is a versatile and reliable device designed for monitoring and controlling water quality in various applications. Its robust features make it an essential tool for environmental scientists, water treatment facilities, and industrial processes. The sc100TM is equipped with a user-friendly interface that allows for easy navigation and configuration, ensuring quick implementation in various settings.

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The sc100TM employs advanced digital sensor technology that ensures high accuracy and reliability in readings. These sensors are designed to provide consistent performance even in challenging environments. The device is also compatible with a wide range of Hach sensors, enabling users to customize their monitoring solutions based on specific requirements.

In addition to its measurement capabilities, the sc100TM features built-in data logging and reporting functions. This allows users to track water quality trends over time, facilitating informed decision-making and compliance with regulatory standards. The data can be easily exported for further analysis or reporting, making it an essential companion for environmental monitoring and compliance activities.

Connectivity is another critical aspect of the sc100TM. With options for wireless data transmission, users can access real-time data remotely, promoting better monitoring and quicker response to any changes in water quality. This feature is particularly beneficial for facilities that require constant monitoring, as it enables quick interventions when necessary.

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In summary, the Hach sc100TM sets itself apart as a powerful tool for water quality monitoring. With its multi-parameter capabilities, advanced sensor technology, comprehensive data logging, and connectivity features, it provides users with the capability to maintain compliance and enhance water quality management strategies effectively. Whether in a laboratory or a field setting, the sc100TM is designed to meet the demands of modern water quality monitoring.