Model PDA1500 Logic Level Converter
Instruction Manual
20
Inverted Cascade Mode
Inverted Mode may be applied to Cascade Mode. When the H/L
pushbutton is latched in the recessed position, Inverted Mode is active.
The outputs behave using the same logic as in Cascade Mode, but the
output states are all inverted.
This makes the Cascade Mode output function using exclusive OR
(XOR) logic.
Table 4. Inverted Cascade Mode Operation Logic Example 1
Input
Channel
Input
Voltage
1
(CH1-CH4)
LIVE
INPUTS
LED
OUTPUTS
State
2
(
1-4
)
XOR Logic
CH1
High
On (Red)
Low
CH1 & CH2
CH2
High
On (Red)
High
CH2 & CH3
CH3
Low
Off
Low
CH3 & CH4
CH4
Low
Off
Low
N/A
Table 5. Inverted Cascade Mode Operation Logic Example 2
Input
Channel
Input
Voltage
1
(CH1-CH4)
LIVE
INPUTS
LED
OUTPUTS
State
2
(
1-4
)
XOR Logic
CH1
High
On (Red)
High
CH1 & CH2
CH2
Low
Off
Low
CH2 & CH3
CH3
Low
Off
Low
CH3 & CH4
CH4
Low
Off
Low
N/A
1. Input
“High” for the PDA1500-115 is 85-130 VAC or VDC.
Input “High” for the PDA1500-230 is 185-265 VAC or VDC.
Input “Low” is any voltage lower than the “High” range.
2.
Output “High” is 4.4 to 5.0 VDC.
Output “Low” is 0 to 0.33 VDC
