ACL CSC400 - Ignition Module Wiring

17
B (“RS485 B –” or "D1 B-")
A
D0
Inverting, Transceiver Terminal
0, V0 voltage (V0 > V1 for binary
0 (ON) state
Isolated GND (or common
GND)
C
Common
Signal and Optional Power
Supply common ground
Due to the potential for large amounts of noise on the Modbus communication cable, the “Isolated Ground” terminal is
connected to earth ground on the CSC400 board to improve noise immunity.
Ignition Module 1 and 2 Inputs & Outputs
The four terminals marked as "To Igniter 1" on the main circuit board need to be wired directly to the ACL Ignition Module if
Ignitor 1 is enabled in the menu system. The four terminals marked as "To Igniter 2" on the main circuit board need to be
wired directly to the ACL Ignition Module if Ignitor 2 is enabled in the menu system. This provides two-way communication
between the CSC400 and the ignition module(s), creating a complete combustion safety control and burner ignition system.
(See wiring diagram).
As shown in the Ignition Module Power Flow Diagram above, the "P"ower outputs to the ignition modules can be interrupted
by eleven methods (shutdowns, on/off switches, temperature relays, solid-state control relays).
Due to the fact that the two ignitors are independently controlled, a disabled ignitor does not need to have a jumper installed
between the "P" and "V" terminals to ensure that the enabled ignitor still works.
All of the below signals need to be attached between the CSC400 and Ignition Module 1 for the burner system to work
properly when Ignitor 1 is enabled. The Pilot GND signal is used to connect the ground wire attached to the Pilot assembly
ground lug to the ground of the CSC400.
"IGN 1"
Terminal
Number
Designation
Description
Ignition Module
Wiring Harness
Color
Direction
58
P
Power (12VDC)
Red
Power output to Ignition
Module
59
A
Alarm
Blue
Input signal from Ignition
Module (12VDC level)
60
V
Valve
Brown
Input signal from Ignition
Module (12VDC level)
61
GND
Ground
Yellow
Ground
62
Pilot GND
Ground to Pilot
Ground lug
connection
N/A
Ground
All of the below signals need to be attached between the CSC400 and Ignition Module 2 for the burner system to work
properly when Ignitor 2 is enabled. The Pilot GND signal is used to connect the ground wire attached to the Pilot assembly
groung lug to the ground of the CSC400.
Refer to the "Modbus/RS-485 Cable Connections – Field Installations" section on page 39
or the document "CSC400_Modbus_Installation_Manual.pdf" for more details on additional
Modbus registers, programming, testing, and troubleshooting.