ETC CEM3 v1.5.1 - Manual (Page 50)

44 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
1
2
AF Card Addressing
Card 1
Card 2
Card 3
Card 4
S
W
1
S
W
2
S
W
3
S
W
4 1 SR3-6
(E)SR3-12
(E)SR3-24
(E)SR3-48
2
3
4
ESR3-36