Chamberlain SW470, SW490 27

PROGRAM SETTINGS (DIP SWITCH S2)

EDGE/PHOTO OPEN

This switch (S2-3) selects edge or photo sensor for the gate opening protection input.

Open Photo Eye (Pause): When the controller is configured for photo eyes, the input functions to pause the gate during the opening cycle. Once the input is cleared the gate continues to open.

Open Edge: When the controller is configured for safety edges, the input functions to reverse the gate to the close limit when the edge is activated during the opening cycle.

	EDGE OPEN			CLED		PHOTO OPEN			CLED
S2	MAG	WARN	OPED	CLED	S2	MAG	WARN	OPED	CLED
S2					S2
	ON					ON

EDGE/PHOTO CLOSE

This switch (S2-4) selects edge or photo sensor for the gate closing protection input.

Close Photo Eye (Reverse): When the controller is configured for photo eyes, the input functions to reverse the gate to the open limit when activated during the close cycle.

NOTE: Timer-to-Close will reset if enabled.

Close Edge: When the controller is configured for safety edges, the input functions to reverse the gate to the open limit when activated during the close cycle. The entrapment is not cleared at the limit and the timer to close will be disabled. The Timer-to-Close may be enabled by activating the interrupt loop, soft open or hard open input.

ON				ON
1	2	3	4	1	2	3	4
		PH	PH			PH	PH

(Factory Default)

MASTER/SECOND SYSTEMS

Dual Gate Communications

The control board is capable of running the operator in a master or second mode depending on (S4) switch setting.

Before initiating any command the master unit queries for the presence of a “second unit” for a time period of one second. If the master gets no response the operator will operate in a stand alone mode. NOTE: For single unit applications, a jumper must be placed between pins 1 and 2 of the J4 connector. In this mode no further communications will take place during travel. If the master detects the presence of a second unit the master will continue to query the second unit during travel. The second unit will send a response to the master for every query. The second operator will stop if there is a period of one second or more of no communications.

TRAFFIC

	EDGE CLOSE					PHOTO CLOSE
S2	MAG	WARN	OPED	CLED	S2	MAG	WARN	OPED	CLED
S2					S2
	ON					ON
ON					ON
	1	2	3	4		1	2	3	4
			PH	PH				PH	PH

(Factory Default)

When two operators are connected in dual gate configuration accessories may be connected to either the master or second.

NOTE: Do not run Master/Second communication wiring in the same conduit as the power and control wiring. The Second unit will require a normally close stop circuit for proper system operation. After Master/Second wiring has been completed and the S4 switch programmed, both units must have their power cycled to initiate proper Master/Second communication. The motor learn function must be completed in stand alone mode prior to Master/Second wiring.

Master or Standalone	Second Gate
Gate Setting	Setting
Master	Master
Unit	Unit
ON	ON
S4	S4
	S4
Second	Second
Unit	Unit

STREET


Terminal		Terminal		Earthground Rod
Block
	Shielded		Block
				(One Side Only)

Cable

SAMS Conduit

Hold	Open

Second

(Twisted Pair)

Conduit

Shadow	Loop
Shadow		Loop
	Safety	Loop
	Safety	COMPLEX
		COMPLEX
		OR
		PARKING LOT