Troubleshooting guide

MX2820 System Manual
7-70 61186003L1-1D
CAUTION
Electronic modules can be damaged by static electrical discharge.
Before handling modules, wear an antistatic discharge wrist strap
to prevent damage to electronic components. Place modules in
antistatic packing material when transporting or storing. When
working on modules, always place them on an approved antistatic
mat that is electrically grounded.
PROCEDURE
MX2820 Fan Module, P/N 1181006L1
1. Locate the AUX3 wire-wrap post on the MX2820 backplane (see Figure 7-13).
Figure 7-13. MX2820 Fan Connections and AUX3 Alarm Contacts
USE COPPER
CONDUCTORS ONLY
R8
R7
R6
R5
P4
P6
N
C
C
N
O
C
N
O
M
I
N
N
C
C
N
O
+
–
N
H
C
T
R
S
T
R
S
A
U
X
1
A
U
X
2
A
U
X
3
A
C
O
P
W
R
A
R
E
T
A
P
W
R
B
R
E
T
B
J2
J1
TB1
CLKB
R4
R10
R1
D1
R2R9
R3
D4
D3
D2
1 IN
(T1/R1)
CD Petit Ace 25 CD Petit Ace 25 CD Petit Ace 25
ALM
B
ALM
A
-48V
DC
B
-48V
DC
A
-48V
RET
B
-48V
RET
A
ALM
B
ALM
A
-48V
DC
B
-48V
DC
A
-48V
RET
B
-48V
RET
A
USE COPPER CONDUCTORS ONLY
1181006L1
INPUT; 48VDC; 0.2A
THIS UNIT MAY BE POWERED
BY REDUNDANT POWER SOURCES
FUSE / 1 AMP
LISTED
ACCESSORY
I.T.E.
E13083
USE COPPER CONDUCTORS ONLY
MX2820 Backplane