
Appendix B: 8LS-CP
8LS User’s Guide 107
The 8LS-CP is not only ordered for the number of carbon input loops
desired, but the CPU DIP Switch on the CPU board must be set
correctly to reflect the number of carbon inputs.
The figure below presents a typical 8LS-CP control system.
Number of Carbon Loops
CPU DIP Switch
#7 #8
CP-1 Off Off
CP-2 Off On
CP-3 On Off
CP-4 On On
8 loop controller
Probe T/C
Carbon probe
Furnace/Generator
Furn T/C
Loop #1 Probe temperature input
Loop #2 Carbon input
T/C
Loop #3
Furnace temperature control
Furn heat control
Loop #1 or #3 PID primar
output
Reverse Action TP or analo
Gas valve
Atmosphere
Control
Loop #2 PID primar
output
Reverse action TP or analo
SSR
Rela
N.C.
Air valve
Atmosphere
Control
DAC
SSR
Air flow
re
ulator
N.C.
Probe
air
suppl
GAS
AIR
Burn -off
solenoid valve
To carbon probe
burn-off port
To carbon probe
reference port
Re
uires DAC for
analo
output
Loop #2 PID secondar
output
Direct Action TP onl
CP
as shut off valve.
Closed when loop #1 PV(1400 or PV>2400º
F.
1400-2400
CO+CO2: 1-30%
Alternate
must use di
ital
CP
as output
Generator
.
Connection
for
Temperature
Control
External
Hi
h limit
CP
trim
as
di
ital
output
Probe
Burn off
di
ital
output
Suppl
Suppl
120 VAC
Suppl
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