Chamberlain LIFTMASTER PROFESSIONAL MSLDCBB, Installation And Service Manual

16

OVER DRIVE CPU

15

10

1

ON

2 3 4 5 6 7 8

1

2

3

4

5

6

7

8

9

10

11

12

WARNING FOR
CONTINUOUS
PROTECTION
AGAINST FIRE
REPLACE ONLY
WITH THE SAME
TYPE AND RATING
OF FUSE

1 2 3 4 5 6 7 8

ON

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

D13

D15

S2

S1

D16

D17

D18

D19

D22

D23

D24

TX

J5

MANUAL

OPEN

S3

CLOSE

EXTERNAL

LIMIT INPUTS

OBSTRUCTION SIGNAL

CONNECTION

J2

J3

 U5

CPU

 U3

D7

D6

D5

D4

D3

D2

D11

D12

D14

I/O INTERFACE

PORT

OPEN LIMIT SENSOR

OPEN DRIVERS ON

MOTOR BRAKE ON

CLOSE DRIVERS ON

CLOSE LIMIT SENSOR

OBSTRUCTION SENSE

(IRD AND MRT)

K1

J1

J4

D1

RELAY INDICATOR

RELAY (OPTIONAL)

IRD1

JP2

R63

BATTERY CHARGE

K1 RELAY

TERMINALS

C NC NO DC

BLK

ACC+

ACC–

BAT–

BAT+

24V AC XFMR

MOTOR

RED

YEL

YEL

BLU

ORG

24VDC

{REQULATED}

F4

F3

1 AMP DC

F1

H BEAT

BATTERY

LOW

AC

POWER

C O N T R O L   B O A R D   L AY O U T

COMPONENT LOCATIONS

Accessory power is 24VDC regulated rated at 500 ma. [1/2 amp].
{Power at ac and at K1 relay pin-4+ is fused at F1 with a 1 amp fast-blo fuse}

J5 #4 

for use with hard wired line of sight devices to open gate and reset unit.

D11:

Heart beat. Shows that processor and program routine are running properly.

D12:

Battery status. See diagnostic procedures on page 14.

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.

F1:

1 amp fast-blo fuse (5mm x 20mm). Maximum continuous draw is 1/2 amp. (U.L. listed fuse only.)

F3:

10 amp ATO type fuse for 24VAC input power. (U.L. listed fuse only.)

F4:

15 amp ATO type fuse for 24VDC battery input power. (U.L. listed fuse only.)

JP2: 

Input for photo beam as a secondary entrapment protection.