Control Board Layout; Input Locations - Chamberlain MEGA ARM / MEGA ARM TOWER Installation And Service Manual

J2
OLS
D7
Open Limit Sensor
OPEN
D6
Open Drivers On
BRAKE
D5
Motor Brake On
CLOSE
D4
Close Drivers On
CLS
D3
Close Limit Sensor
IRD
D2
Obstruction Sense
(IRD and MRT)
Relay Indicator
Relay (Optional)
J1

INPUT LOCATIONS

Accessory power is 24Vdc regulated rated at 500 ma. [1/2 amp].
NOTE: J5 #8 is now the SAMS with memory input (see page 12).
D11: Heart beat. Shows that processor and program are running properly.
D12: Battery status. See diagnostic procedures.
D14: AC power indicator. Shows that AC power is present.
S3: Manual open. To allow gate to be opened or closed during service of unit. Keep in the "Close" position for normal operation.
F3: 10 amp ATO type fuse for 24Vac input power. (UL listed fuse only.)
F4: 15 amp ATO type fuse for 24Vdc battery input power. (UL listed fuse only.)
C O N T R O L B O A R D L A Y O U T
1 1
J3
AUX LIMITS M/S
D8 D1Ø
S1 S2
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
R1 R12
U4
C2
U1
X1
R1Ø
R9
R8
U5
R7
R6
U3
R5 U2
R19
R4
R3
Q1
D9
D1
R2 R11
HBEAT BAT LO AC POWER
K1
D11 D12
R13
J4
U19
Aux Relay
C NC NO DC
1
1
ACC+
PWR
24Vdc
K1 Relay
(Regulated)
Terminals
(Optional)
1 2 3
MANUAL
J5
OPEN
Q2
R14
S3 T2 T4
R18
T1 T3
R17
OPEN 1 OPEN 2 OPEN 3
CLOSE
R16
R21
R24 R35 R41
C3
U8 U9 U11
R23 R34 R4Ø
R22 R33 R39
R26
U6
IRD1
R25
U7
U1Ø
C4
R38
CPU
JP2
R37
F2
1A DC
R2Ø
C8
+
F1
C5
+ F4
B1
F3
D14
BAT– MOV
ACC– BAT– BAT+ 24VAC XFMR
BLK RED YEL YEL BLU
18
Open Gate Inputs - Reader, Push Button
Aux Open / Reset (Pulse Open/Close)
Safety Loop Input
Close Gate Input - Close Loop
Back Away - Free Exit Loop
Shadow Loop
Commons - 0Vdc
4 5 6 7 8 9 1Ø 11 12
T6 T8
T5 T7
AUX 4 SAFETY 5CLOSE 6 BACK 7SHADOW 8
C16
R46 R5Ø R61
U13 U14 U15
R45 R49 R6Ø
R44 R48 R59
R43
R43
R63
D21
U16
R58
C12
U12
DX3
DX4
R57
C13
R56
DX2
R51
R55
D2Ø
WARNING FOR
R62
C2Ø CONTINUOUS
+
PROTECTION
AGAINST FIRE
DX1
REPLACE ONLY
WITH THE SAME
TYPE AND RATING
OF FUSE
MOTOR
TR
MOTOR
ORG