40
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:
1:
Note the module types and positions,
and then remove the modules from
the rack.
2:
Remove the old AF cards by flipping
the white tab on the cards into the
down position
3:
Pull the old cards out of the slots.
4:
Set the DIP switches on the new
cards according to the table below.
Only the first two DIP switches are
used.
5:
Flip the white tab up to prevent it
from interfering with the dimmer
module.
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).
WARNING:
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, and therefore only qualified
technicians should be allowed to remove modules and expose the inside of
the dimmer rack.
Note:
Only the first two DIP switches are used.
3
2
Card 1
Card 2
Card 3
Card 4
S
W
1
S
W
2
S
W
3
S
W
4
S
W
5
S
W
6
S
W
7
S
W
8
1
2
3
4
SR3-6
(E)SR3-12
(E)SR3-24
(E)SR3-48
ESR3-36
0
1
0
1
0
1
0
1
0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
Step 4. AF Card Addressing
1 ON
0 OFF
