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).