Instruction manual

P83259 H
Sheet 17 of 26
Figure 11:
Simplified Single Line Block Diagram
ZONE 1
K2
K3
LOOP
DETECTOR
TONE
ALERT
DETECTOR
DTMF
K5
K4
K6
SELECT
ZONE
CIRCUITRY
RELAY COILS
TIP & RING
MUSIC
AMP. 1 OUT
AMP. 1 IN
CENTRAL AMPLIFIER
SELECT JUMPER
AUDIO
AUDIO
ZONE 2
ZONE 3
AUDIO
K3
K4
K5
K6
ZONE AMP./
CENTRAL AMP.
SELECT SWITCH
K2
LINE LEVEL
MUSIC
FOR A ZONE GROUP
3 ZONE SELECT CIRCUITRY
NIGHT RINGER
CONFIGURATION
SWITCHES
TAL K- BAC K
CIRCUIT
(OPTIONAL)
ONE WAY/TALK-BACK
ZONE
SELECT SWITCHES
COMMUNICATIONS/AUDIO
FROM REMOTE BOARDS
MZEM-3 OR MZC-RM
#1
MZEM-3 OR MZC-RM
#2
MZEM-3 OR MZC-RM
#3
TO REMOTE BOARDS
11. MASTER WIRING INSTRUCTIONS (SEE FIGURE 12):
1. Make sure 24VDC power supply is disconnected from the 115VAC power source.
2. Connect tip and ring from:
A. Stand along telephone, or
B. Telephone system's unused CO line/trunk port, or
C. Telephone system's 600 ohm, audio page port (See Figure 13)
3. Connect night ringer if used (see Figure 14).
4. Connect the background music source to TB2, terminals 3 and 4, on the MZC-144.
5. Connect the 24VDC power supply to the (-)24V and GND(+) terminals on TB3, terminals 6 and 5 respectively.
6. Connect the zone amplifier, speaker amplifiers, or speakers with transformers to the audio pair for zones 1 thru 12 on TB1
of the MZC- 144 and TB1 of each MZEM-3 module as required.
7. If one central amplifier is used for paging and background music:
A. Connect the input of central amplifier to AMP1 OUT, terminals 5 and 6 of TB2 on the MZC-144. Connect the output
of central amplifier to AMP1 IN, terminals 7 and 8 of TB2 on the MZC-144.
B. Connect the output of central amplifier to MUSIC, terminals 1 and 2 of TB1 on MZC-144 and TB1 on MZEM-3
modules, as required.
8. If separate central amplifiers are used, one for paging and one or more for background music:
A. Connect paging amplifier as described in 7A, above.
B. Connect output of background music amplifier(s) as described in 7B, above.
9. Connect MZC-RM relay outputs as required, see Figure 15.
10. Connect the 24VDC power supply to the 115VAC source. When the MZC-144 is used in a Master/Remote configuration
make sure that the remote units are powered up prior to or at the same time as the master.
NOTE
:
When only one central amplifier is used, background music will be muted in all zones when a page is in progress. When
separate central amplifiers are used, background music will be muted in only the paged zone.
12. REMOTE WIRING INSTRUCTIONS (SEE FIGURE 12):
1. Make sure 24VDC power supply is disconnected from the 115VAC power source.
2. With all of the covers off, connect the MZC-CAB between either J11 to J11 or J12 to J12 from the previous unit to the next
unit. This creates a daisy chain of the units. If there are more than five remote units a MZC-BOOSTER is required
between the 5
th
remote unit and the 6
th
remote unit. See the MZC-BOOSTER instruction sheet (P84034) for wiring
instructions.
3. Connect the 24VDC power supply to the (-)24V and GND(+) terminals on TB3, terminals 6 and 5 respectively.