Section 4 Alarms, Relays, And Recorders; Alarm To Relay Connections; Setting Alarm Parameters; Attaching An Alarm To A Relay - Hach AquaTrend 51200 Instrument Manual

Section 4

4.1 Alarm to Relay Connections

4.1.1 Setting Alarm Parameters

4.1.2 Attaching an Alarm to a Relay

51350-18 Alarms Relays Recorders.fm
Alarms, Relays, and Recorders
Sensors allow you to set up a number of alarms for various conditions. If a
sensor measurement is attached to a channel on the AquaTrend
and an alarm is activated on that sensor, a number appears at the bottom of
the display. That number corresponds to the channel with the active alarm
(see number 4 in Table 5 on page
After setting up the sensor alarm parameters as specified in the sensor
manual(s), the next step is to attach the alarm signals to an electrical relay in
a Signal Output Module (SOM). The AquaTrend Interface system allows you
to attach one alarm from a sensor to one relay on any SOM on the network.
See section 4.1.1 and section 4.1.2
Each SOM (stand-alone unit or built into the AquaTrend Interface) provides
two analog outputs and two relays to the network. As many as eight SOMs
can be added to the network.
Sensors have various numbers and types of alarm signals available. Define
the conditions under which an alarm signal will be triggered through the
Alarm Setup menu of the sensor containing that alarm.
1. Press MENU to access the Main Menu.
2. Select Sensor Menu and press ENTER.
3. Select the sensor of interest (choose a sensor shown on the display and
press the ENTER key or press the configure button on the sensor).
4. Select ALARM SETUP and press ENTER.
5. Select ALARM 1 or 2 and press enter. Configure the alarm according to
instructions in the sensor or analyzer's manual. Each sensor or analyzer
contains its own alarm parameters.
To control a relay in an output device with the alarm signal, the alarm must be
attached to the relay of interest. Proceed as follows:
1. Press the MENU key to access the Main Menu.
2. Select the Network Menu option and press ENTER.
3. Select ALARM TO RELAY and press ENTER. A pop-up box will ask
whether you want to attach or detach an alarm to/from a relay.
4. Select ATTACH and press ENTER.
14).
below.
Alarms, Relays, and Recorders
®
Interface,
Page 43