NEC nd-20292 manual Offoff Offon Onoff Onon, 200

									ND-20292
									CHAPTER	2
									APRIL,	1990
NOTE:		Diodes	Dl -D3	are lN4004		24 VOLT	DC
or	equivalent					POWER
*	=	Normal	open contacts		r-l	SUPPLY
+	=	Normal	closed	contacts .--			EXTERNAL SWITCHING	RELAYS
				EPC	1A
				EPC	1B
							RELAY		1	I
										i
				EPC	2A					I
				EPC	ZB					I
										I
										I
								RELAY	2	I
										I
				EPC	3A					I
				, EPC	3B					I
										I

I

Phono Jack

	RELAY 3	I
		I
		I
		R3
,, R3”	41

I

I

I

Figure 200-52 Connection of External Paging and External Background Music.

continuous tone source for external tone ringing. The External tone can be set to any of four ring patterns. These patterns are selectable with DIP switch SW2 (refer to Table 200-20).

The audio output for external tone ringing appears at the phono jack JKl on the ECR-E ETU, its level is adjustable with the volume control VOLl on the ECR- E ETU.

Shielded audio cable is required for this feature. The ECR-E ETU provides four relay contact closures, one per external ring control circuit.

In addition to the three fixed paging zone relays (l-3) the ECR-E ETU contains seven relays which can be programmed to perform external tone ringing (day mode) or night chime (night mode). A maximum of 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 #

1

2

3

4

Description

Continuous Ring Tone (4801606 Hz modulated by 16 Hz)

Continuous Ring Tone (480/606 Hz modulated by 8 Hz)

Ping-Pong Sound (1285 Hz / 0.5sec. ON, 1024 Hz / 05sec. ON, Bsec. OFF)

Continuous Tone (1024 Hz)

SW2 Assignment

Switch in Position 3 Switch in Position 4

OFFOFF

OFFON

ONOFF

ONON

200 - 43