Auber Instruments SYL-2372 Gebruiksaanwijzing - Pagina 2

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3.3 Control output connection

The SSR output of the controller SYL-2372 can be used to turn on a contactor

or a solenoid valve. It can drive a small heater directly if the heater draws less

than 2 Ampere when connected to 120V AC power source. For applications

needing two control outputs, such as one for heating and another for cooling,

relays AL1 or AL2 can be used for the second output with on/off control mode.

3.3.1 Connecting the load through a contactor

Assuming the controller is powered by 120V AC and the contactor has a 120V

AC coil, jump a wire between terminals 7 and 9. Connect terminal 6 to one lead

of the coil and terminal 10 to the other lead of the coil. Please see Figure 7 for

example.

3.3.2. Connecting the heater (or motor) directly from the internal relay

Assuming the controller and the load (heater or cooler) are powered by the

same voltage. Jump a wire from terminal 9 to 7. Connect terminal 6 to the one

lead of the load and terminal 10 to the other lead of the load. Please see Figure

6 for details.

3.4 For first time users without prior experience with PID controllers, the

following notes may prevent you from making common mistakes.

3.4.1 There is no power that flows through terminal 9 and 10 of the controller to

the heater. This is because this controller consumes less than 2 watts of power,

providing only a control signal to relay. Therefore, wires in the 18 to 26 gauge

range should be used to provide the power for terminals 9 and 10. (Thicker

wires may be more difficult to install)

3.4.2 The alarm relay outputs, AL1 and AL2, are "dry" single pole switches,

which means they provide no power to themselves. Please see Figure 7 for

how they are wired when providing a 120V output (or when output voltage is

the same as the power source for the controller). If the load of the relay

requires a different voltage than that for the controller, another power source

will be needed.

3.4.3 For all controller models listed in this manual, the power is modified by

regulating the duration of "on" time for a fixed period. It is not controlled by

regulating amplitude of the voltage or current. This is often referred as time

proportional control. For example, if the cycle rate is set for 100 seconds, a 60%

output means controller will switch on the power for 60 seconds and off for 40

seconds (60/100 = 60%). Almost all high power control systems use time

proportional control because amplitude proportional control is too expensive

and inefficient.

4. Front Panel and Operation

Figure 2. Front panel

① PV display: Indicates the sensor's read out or process value (PV).

② SV display: Indicates the set value (SV) or output value (%).

③ AL1 indicator: It lights up when AL1 relay is on (Display alarm 1).

④ AL2 indicator: It lights up when AL2 relay is on (Display alarm 2).

⑤ A-M indicator: The light indicates that the controller is in manual mode. For

the controllers with the Ramp/Soak option, this light indicates that the

program is running.

⑥ Output indicator: It is synchronized with control output (terminal 7 and 8),

and the power to the load. When it is on, the heater (or cooler) is powered.

2021.06

⑦ SET key: When it is pressed momentarily, the controller will switch the

lower (SV) display between set value and percentage of output. When

pressed and held for two seconds will put the controller into parameter

setting mode.

⑧ Automatic/Manual function key (A/M) /Data shift key.

⑨ Decrement key ▼: Decreases numeric value of the setting value.

⑩ Increment key ▲: Increases numeric value of the setting value.

4.1 Display Status

SET

A/M

SET

Figure 3. Display modes

Display mode 1: When the power is turned on, the upper display window

shows the measured value (PV), and the lower window shows the four-digit set

value (SV).

Display mode 2: Press the SET key to change the display status into mode 2.

The upper display window shows the measured value (PV), and the lower

windows shows the output value. The example pictures the output percentage

at 60% when in Automatic (PID) control mode. If parameter A-M = 1 (see table

2), pressing the A/M key will switch the controller between PID and Manual

control mode while leaving the output unchanged. This bumpless/smooth

transfer allows the controller to be switched between manual and automatic

mode without the output suddenly "bumping" to a different value.

Display mode 3: Press the SET key for 2 seconds to enter the display mode 3.

(This mode allows users to change the system parameters.)

4.2 Basic Operation

4.2.1 Changing set value (SV)

Press the ▼ or ▲ key once. The decimal point on the lower right corner will

start to flash. Press the ▼ or ▲ key to change SV until the desired value is

displayed. If SV has a large change, press the A/M key to move the flashing

decimal point to the desired digit that needs to be changed. Then press the ▼

or ▲ key to start changing SV from that digit. The decimal point will stop

flashing after no key is pressed for 3 seconds. The changed SV will be

automatically registered without pressing the SET key.

4.2.2 Display change

Press the SET key to change the display mode. The display can be changed

between display modes 1 and 2.

4.2.3 Manual/Automatic mode switch

Bumpless switching between PID mode and Manual mode can be performed

by pressing the A/M key. The A-M LED will light up when the controller is in

Manual mode. In Manual mode, the output amplitude can be increased or

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A/M

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