Model PDA1500 Logic Level Converter
Instruction Manual
21
Multiple Unit Cascade Mode
Cascade Mode logic may be combined across multiple Logic Level
Converters to monitor more than 3 alarm outputs (or 4 inputs). When
wired together, output four (4) of a Logic Level Converter will monitor
input CH4 and CH1 of the next Logic Level Converter wired in series
with it.
For information on how to connect units for Cascade Mode, see
Cascade Mode Multiple Unit I/O Connections on page 14.
Inverted Cascade Mode will also work across multiple units.
Multiple unit Cascade Mode may be used across an unlimited number
of units.
Table 6. Multiple Unit Cascade Mode Operation Logic
Unit
#
Input
Channel
Input
Voltage
1
(CH1-CH4)
LIVE
INPUTS
LED
OUTPUTS
State
2
(
1-4
)
XNOR
Logic
(Unit #)
1
CH1
High
On (Red)
Low
CH1 (1) &
CH2 (1)
1
CH2
High
On (Red)
Low
CH2 (1) &
CH3 (1)
1
CH3
High
On (Red)
Low
CH3 (1) &
CH4 (1)
1
CH4
High
On (Red)
High
CH4 (1) &
CH1 (2)
2
CH1
Low
Off
Low
CH1 (2) &
CH2 (2)
2
CH2
Low
Off
Low
CH2 (2) &
CH3 (2)
2
CH3
Low
Off
Low
CH3 (2) &
CH4 (2)
2
CH4
Low
Off
Low
CH4 (2) &
CH1 (1)
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
