A&D AD-4405 manual RS-422/RS-485, Relay OutputOP-03, Trm, Com, Circuit

DC50V

DC100mA 8Ω

17. RS-422/RS-485, Relay Output(OP-03)

Replacing the RS-232C interface with this option, the RS-422/RS-485 interface can connect up to 32 indicators and control them from a computer or a PLC.

The functions of the RS-422/RS-485 interface are common to RS-232C except the signal system.

The relays output the result of comparison.

Solid-state-relay

Maximum voltage

Maximum current

Maximum resistance

Pin connections

	Function	Pin No.	Signal name	Direction	Description
		1	SDA	Output	Transmission A terminal
		2	SDB	Output	Transmission B terminal
	RS-422	3	RDA	Input	Receive A terminal
	RS-485	4	RDB	Input	Receive B terminal
		5	TRM	-	Terminator resistance (100Ω)
		6	SG	-	Signal ground
		7	HI	Output	Relay output HI
	Relay	8	OK	Output	Relay output OK
	output	9	LO	Output	Relay output LO
		10	COM	-	Relay output common
Adaptable connector			TM-BLA10 (an accessory)

An AC adapter (an accessory) must be connected to the option board when using the RS-422 or RS-485 interface. If using relay output only, the AC adapter is not required.

Circuit

						￿￿					￿￿￿
RS-422 Input					￿￿￿￿
RS-485	Input
RS-422	Output			￿￿￿￿￿		￿￿￿￿					￿￿￿
RS-485	Output
				￿￿￿￿￿
						￿￿￿￿					￿￿￿
+	-	￿￿	￿￿	￿	￿	￿	￿	￿	￿	￿	￿￿￿
	&%￿	5&#￿ 5&$￿ 4&#			4&$	64/	5)	*+	1-	.1	%1/￿

DC 7V - 10V RS-422/RS-485 Terminals Relay Output Terminals

AC adapter Jack

(The AC adapter is an accessory of OP-03)

Note: Please confirm that the AC adapter type is correct

for your local voltage and receptacle type
17. RS-422/RS-485, Relay Output(OP-03)	Page 66	AD-4405 Weighing Indicator