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2.6 Wiring Schematics
This section provides wiring schematics for L-827/L-829 Advanced Control Equipment
(ACE2).
See Figure 30 for the L-827/L-829 ACE2 wiring connections to the constant current regulator
(CCR).
2.6.1 Connectors
Figure 24:
Internal Connections
NOTE: A
. Terminal block J4 accepts any discrete contact closure that uses 24 to 250V AC/DC control voltage.
Examples of useful inputs are: CCR Over Current, CCR Over Voltage, CCR Primary Power, CCR Remote Local,
CCR Open Circuit, CCR Access Door open, etc.
NOTE:
B. Terminal block J5 carries system latching relay outputs that are used to control brightness steps of a
CCR. These outputs can also be configured to control any element that requires an ON/OFF contact closure. The
output current is 1A max so 20 AWG wire or larger is suggested. In addition, these terminal blocks can be
configured to control both CCR brightness steps and a L-847 Circuit Selector Switch.
Table 10:
Main Board Connectors
Function
Description
J1
Input Power
J4
Discreet Input (See Note A)
J5
Discreet Output (See Note B)
J8
Com A RS-422
J9
Com B RS-422
J10
LCD Board Ribbon Cable Connector
J11
LCD Connection Ribbon Cable Connector
J12
External Keypad Connection
J13
ACE2 External Display Power
J14
Configuration Port RS-232
U6
Non-Volatile Memory
U21
CVM Fiber Optic Port
D1
Internal Power Present LED
D7 thru D15
Internal Status LEDs
IRMS
IRMS Fiber Optic Interface Connection
J1
J5
J9
J8
J4
IRMS
J14
U21
U6
J10
J3
J11
D1
J12
D7-D15