Auber SYL-2352 Buku Petunjuk - Halaman 2

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3.3 Control output connection

The relay output of the controller SYL-2342 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 10A 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. Please

see Figure 11 for details.

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 8 and 9. Connect terminal 7 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 cooler) 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 8. Connect terminal 7 to the one

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

6 and 9 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 Power to the heater does not flow through terminal 9 and 10 of the

controller. The controller consumes less than 2 watts of power. It only provides

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

should be used for providing power to terminals 9 and 10. Thicker wires may

be more difficult to install.

3.4.2 The control relay outputs (for SYL-2342), AL1 and AL2, are "dry" single

pole switches. They do not provide power by themselves. Please see Figure 6,

7 and 11 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. See Figure 8 for examples.

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

regulating the duration of on time for a fixed period of time. 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 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.

④ AL2 indicator: It lights up when AL2 relay is on.

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.

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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. This picture shows the output percentage is

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 with the output unchanged. This bumpless 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, and then release it. 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 the change of SV is large, 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.

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