Replacing af cards – ETC CEM3 v1.5.1 User Manual

Page 50

CEM3 User Manual

Replacing AF Cards

AF cards are located on the right side of the dimmer module slot between the copper

neutral busses and the dimming circuitry cards.

To replace the AF cards:

Step 1:

Note the module types and positions and remove the modules from the rack.

Step 2:

Remove the old AF cards by flipping the white

tab on the cards into the down position.

Step 3:

Pull the old cards out of the slots.

Step 4:

Set the DIP switches on the new cards

according to the chart below. Only the first two

DIP switches are used.

Step 5:

Flip the white tab up to prevent it from

interfering with the dimmer module.

Step 6:

Slide the new AF cards completely into the

vacant slots starting with card #1 in the top.

The number of cards depends on rack size

(see table below).

W A R N I N G :

To avoid the possibility of electric shock, power must be turned OFF when

you perform this procedure. Before removing modules or AF cards de-

energize main feed to dimmer rack and follow appropriate Lockout/Tagout

procedures as described in NFPA Standard 70E. It is important to note that

electrical equipment such as dimmer racks can present an arc flash safety

hazard if improperly serviced. This is due to available large short circuit

currents on the feeders of the equipment. Any work on energized equipment

must comply with OSHA Electrical Safe Working Practices.
Phase voltages inside the rack can be deadly, therefore only qualified

technicians should be allowed to remove modules and expose the inside of

the dimmer rack.

Flip tab down, pull card out

AF Card Addressing

Card 1
Card 2
Card 3
Card 4

1 SR3-6

(E)SR3-12

(E)SR3-24

(E)SR3-48

ESR3-36