ADC and V35, RS-232/V24, X21 manual 29

ADCP-50-304 • Issue 19 • June 1999 • Section 2: Functional Description

A/B	A/B
	RELAYS
SWITCH
INDICATORS	A/B
	DTE AND
	ALARM
	LOGIC
A/B		UPPER
RELAY	DTE
COMPUTER		INTERFACE
	(A)
		PORT
MODEM	DTE
	(B)

LOWER

MONITOR DCE INTERFACE PORT

1641-A

Figure 2-5. LED/Alarm Patch Module with A/B Switching Simplified Circuit Diagram

				A/B SWITCH CONTROL			CONTROL
TOGGLE		A	A/B	A/B			MODULE
			SWITCH
SWITCH		B		RELAYS
			LOGIC
					A/B
	A				INTERLOCK
					JUMPER	GROUP 1
	B
						2
				A/B
						3	BACKPLANE
				RELAYS
						4
				ALARM		V
				JUMPER
STATUS	TD						PIN 2
INDICATORS	RD						PIN 3
	DCD						PIN 8
	SQ						PIN 21	RS-232
	RTS						PIN 4
								LEADS
	CTS						PIN 5
	DSR						PIN 6
ALARM	DTR						PIN 20
							PIN 7
INDICATOR	ALM
TOUCH	RST			ALARM
SWITCH
				CIRCUIT
				CONTROL	ALARM		CONTROL
	OFF			LOGIC			MODULE
TOGGLE
	ALM
SWITCH
	LED					+5 Vcd
ROTARY					AUTOMATIC	GND	BACKPLANE
	DLY				ALARM	+12 Vcd
SWITCH					RESET
				STORE
						1611-A

Figure 2-6. LED/Alarm Patch Module with A/B Switching Detailed Circuit Diagram

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© 1999, ADC Telecommunications, Inc.