ACL CSC400 User Manual

14
Shutdown Inputs: High Gas, Low Gas, Level, Auxiliary 1 / 2
Opening of any switch attached to the Shutdown inputs will shut off the ignition module and de-energize all six valve outputs
(Pilot, Main, TMain for IGN1 and IGN2). If the S/D Latch menu option for any shutdown is in "Unlatched S/D" mode, the
CSC400 will attempt to restart ignition (on enabled ignitors) when any switch attached to the Shutdown inputs clears. If the
S/D Latch menu option is in "Latched S/D" mode for a selected shutdown, this set of shutdown terminals will prevent the
system from automatically restarting after it detects any interruption in continuity on these input terminals. If a latched
shutdown trips, then resets itself, the CSC400 will detect this, prevent the system from automatically restarting, and alert the
user on the LED display (and via Modbus) as to which shutdown caused the latch out.
High Gas, Low Gas (Pressure) Shutdown Input
The High Gas and Low Gas (Pressure) Shutdown inputs allow the user to hard wire a remote switch or relay for controlling the
CSC400. These terminals must be wired to dry contacts of remote gas pressure switchs or relays when used. The High/Low
Gas switch turns on and off the power delivered to the ignition module as long as all other shutdowns and Proof of Closure
inputs are closed and temperature values for TC1 & TC2 (if enabled) thermocouples are within the allowable range. A wire
jumper must remain across the High Gas Shutdown terminals when not in use. A wire jumper must remain across the Low Gas
Shutdown terminals when not in use.
The CSC400 LED display will show "High Gas" when the High Gas Shutdown input is open.
The CSC400 LED display will show "Low Gas" when the Low Gas Shutdown input is open.
Terminal Number
Description
Allowable Input Range
22
High Gas Shutdown
None: use dry contacts
23
High Gas Shutdown
None: use dry contacts
24
Low Gas Shutdown
None: use dry contacts
25
Low Gas Shutdown
None: use dry contacts
Level Shutdown Input
The Level Shutdown switch input allows the user to hard wire a remote level switch or relay for controlling the CSC400.
These terminals must be wired to dry contacts of a remote level switch (or pressure or auxiliary switch) or relay when used. If
more than one shutdown switch is used, they must be wired in series. The Level Shutdown switch controls the power delivered
to the ignition module as long as all other shutdowns and Proof of Closure inputs are closed and temperature values for both
thermocouples are within the allowable range. A wire jumper must remain across the Level Shutdown terminals when not in
use.
The CSC400 LED display will show "Level" when the Level Shutdown input is open.
Terminal Number
Description
Allowable Input Range
26
Level Shutdown
None: use dry contacts
27
Level Shutdown
None: use dry contacts
Auxiliary Shutdown 1/2 Inputs
The Auxiliary Shutdown inputs allow the user to hard wire a remote switch or relay for controlling the CSC400. These
terminals must be wired to dry contacts of a remote switch (pressure or auxiliary) or relay when used. If more than one
shutdown switch is used, they must be wired in series. The Shutdown switch turns on and off the power delivered to the

ACL CSC400 Specifications

General

Brand	ACL
Model	CSC400
Category	Controller
Language	English