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AD-25182501 CHAPTER 3
Page 95
Revision 1.0.1
NAP- 200-007
Sheet 32/42
Termination of Cables on MDF
(b) MDF Cross Connection
Notes:
1. The current capacity of the opto-coupler (PN-DK00 card) is 125 mA.
2. The isolator’s relay must be compatible with nominal 24 Volt circuits, and the suppression diode
shown is mandatory.
3. The audio path in the isolator must be capacitor-coupled as shown.
4. The Line-fault detection in the C.O.T. must be disabled. Refer to the Command Manual for details.
Figure 007-19 MDF Cross Connection for Paging Equipment
TO CONTROL
CIRCUIT
TO SPEECH
CIRCUIT
+
–
GND
-27V
A
B
29K7 29
4
K6 4
28
K5 28
3
K4 3
27
K3 27
26
K1 26
2
1K0 1
K2 2
LEN0000
LEN0002
PIM0
P
PN-DK00
LT00
LTC0
J
3333
8
8
32
32
7
7
31
31
30
30
6
55
6
PN-4COT/PN-2COT
PZ-PW86
MDF
GND
A
B
CONTROL
CIRCUIT
SPEECH
PATH
CIRCUIT
PAGING EQUIPMENT
SPEAKER
GND
LT01
T3
R3
T2
R2
T1
T0
R0
R1
LEN0004 (No. 0)
LEN0005 (No. 1)
LEN0006 (No. 2)
LEN0007 (No. 3)
-27V
AUSTEL - approved
Line Isolation Unit
-27V