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Low-level digital ac input – Wavetronix Click 500 (programmable controller) (CLK-500) - Developer Guide User Manual

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CHAPTER 1 • USING THE CLICK 500

Note

The Click 500 development platform is shipped with all 12 DIP switches in the Off
position. Turn on only those switches that are needed for the functions you are us-
ing. For example, if you want to load the Click 511 program code onto your device,
turn on SW1:2, SW2:2. and SW1:6. SW1:2 and SW2:2 setup the two input terminals
as contact closure inputs, and SW1:6 will allow you to load the program. For proper
operation, leave all the other switches in the Off position.

Digital Input 1

SW1:1

SW1:2

SW1:3

SW1:4

SW1:5

SW1:6

Low-level AC Input

On

Off

Off

Off

Off

Contact Closure Input

Off

On

Off

Off

Off

DC Input 9 VDC Threshold

Off

Off

On

Off

Off

DC Input 11.6 VDC Threshold

Off

Off

Off

On

Off

DC Input 23.3 VDC Threshold Off

Off

Off

Off

On

Table 1.2 – Digital Input 1

Digital Input 2

SW2:1

SW2:2

SW2:3

SW2:4 SW2:5

SW1:6

Low-level AC Input

On

Off

Off

Off

Off

Contact Closure Input

Off

On

Off

Off

Off

DC Input 9 VDC Threshold

Off

Off

On

Off

Off

DC Input 11.6 VDC Threshold

Off

Off

Off

On

Off

DC Input 23.3 VDC Threshold Off

Off

Off

Off

On

Table 1.3 – Digital Input 2

It is possible to have digital input 1 configured as one type of input and digital input 2 con-

figured as another. For example, digital input 1 could monitor low-level AC, while digital

input 2 could monitor DC voltage.

Low-level Digital AC Input

The low-level AC input is designed to work with a CR Magnetics 3110 Split-Core Current

Transformer or equivalent (two are included in the development kit). These clamp-on style

current transformers have a unique hinge and locking snap that allows attachment without

interrupting the current-carrying wire. Snap the transformer around either the AC line

wire or AC neutral wire, but not both. Make sure that the locking snap is secure by pressing

down firmly when making a connection (see Figure 1.9).