Specifications
13
K1
K1
K13
NCA
CMA
NOA
NCB
CMB
NOB
MT1
MT2
EXTERNAL
CONTACTS
MUTE
CONTACT
EM1
EM2
NRT
NRR
NRC1
NRC2
GS
+TB
T
T
R
R
-TB
TI
RI
BMBA
BMBB
BMOA
BMOB
POA
POB
POA
POB
TBOA
TBOB
PIA
PIB
TBIA
TBIB
Z1B
Z1A
Z2B
Z2A
Z3B
Z3A
-24V
+24V
+24V
BMSA
BMSB
BACK-UP
RESET
K1
K2
K3
K4
K5
K6
BATTERY
BACK-UP
VOLTAGE
REGULATOR
MICRO-
CONTROLLER
LOOP
CURRENT
DETECTOR
TONE
GENERATOR
DTMF
DECODER
NIGHT RING
TRIGGER
AND RING
DETECTOR
TALK BAT
SEL
TALK BAT
SEL
300
300
300
300
.01
.01
.68
.68
300
300
1.5
50V
1.5
50V
+
+
K3 K3
K2
K2
K2
10K
BGM
VOL
TONE
VOL
NIGHT
RING
VOL
K2
K2
K3
K3
K3
K4
K5
K6
NOTES:
1. ALL RELAYS SHOWN IN “ON HOOK” (HOLD) STATE.
2. EXTERNAL CONTACTS (K1) REVERSE STATE WHEN UNIT GOES OFF HOOK, AND DURING
NIGHT RING AND EMERGENCY/SHIFT CHANGE FEATURE OPERATION.
3. K2 REVERSES STATE WHEN UNIT GOES OFF HOOK.
4. K3 REVERSES STATE WHEN PAGING TO A TALKBACK ZONE.
5. MUTE CONTACT (K13) IS NORMALLY CLOSED EXCEPT DURING TALKBACK ZONE ACCESS.
6. K4-K12 REVERSE STATE WHEN THAT CORRESPONDING ZONE IS ACCESSED.
7. UNIT BECOMES ACTIVE WHEN LOOP CURRENT DETECTOR SENSES CURRENT FLOW
INTO THE RI TERMINAL, OR WHEN NIGHT RING OR EMERGENCY/SHIFT CHANGE FEATURE
IS ACTIVATED.
Figure 13 –
ZPM3 Functional Block Diagram