user manual

ND-20292
CHAPTER 2
APRIL, 1990
NOTE: Diodes Dl -D3 are lN4004
or equivalent
*
= Normal open contacts
24 VOLT DC
r-l
POWER
SUPPLY
+
= Normal closed contacts
EXTERNAL SWITCHING RELAYS
.--
EPC 1A
EPC 1B
EPC 2A
EPC ZB
EPC 3A
, EPC 3B
RELAY 1
I
i
I
I
I
I
RELAY 2
I
I
I
I
I
I
RELAY 3
I
I
I
I
,, R3”
41
I
I
R3
Phono Jack
Figure 200-52 Connection of External Paging and External Background Music.
continuous tone source for external tone ringing. The
Shielded audio cable is required for this feature. The
External tone can be set to any of four ring patterns. ECR-E ETU provides four relay contact closures, one
These patterns are selectable with DIP switch SW2
per external ring control circuit.
(refer to Table 200-20).
In addition to the three fixed paging zone relays (l-3)
The audio output for external tone ringing appears at
the ECR-E ETU contains seven relays which can be
the phono jack JKl on the ECR-E ETU, its level is programmed to perform external tone ringing (day
adjustable with the volume control VOLl on the ECR-
mode) or night chime (night mode). A maximum of
E ETU.
four relays can be programmed for day mode and a
maximum of three relays can be programmed for night
Table 200-20 ECR-E ETU Ringing Tone Sources
Tone # Description
SW2 Assignment
Switch in Position 3
Switch in Position 4
1
Continuous Ring Tone (4801606 Hz modulated by 16
Hz)
OFF OFF
2 Continuous Ring Tone (480/606 Hz modulated by 8 Hz)
OFF ON
3
Ping-Pong Sound (1285 Hz / 0.5sec. ON, 1024 Hz /
05sec. ON, Bsec. OFF)
ON OFF
4 Continuous Tone (1024 Hz)
ON ON
200 - 43