Siemens SG8158-00 manual Isgs

											Installation
							ISGS				2
		CT 1-1				3		2	Trip 1	Trip
								1	Trip Common
		CT 1-2				4				Relays
								11	Trip 2
		CT 2-1				5
								29
		CT 2-2				6			Trip 3
								30
Current		CT 3-1				7
Input		CT 3-2				8		19	Relay Disabled 1		Relay Disabled
		CT N-1				9		20	Relay Disabled 2		Alarm Contact
		CT N-2				10
			VT 1+			41		31	BO 1
								32
									Binary
			VT 1-			42		33	Outputs
	Voltage		VT 2+			43		34	BO 2
	Input		VT 2-			44
			VT 3+			45
			VT 3-			46
	BI B Switch					14
Breaker and	BI Trip					15
Trip Source
Monitor	Impedance Source					17
	Impedance Sense					18
	Ground Monitor					16
				1	+	21
					-	22
				2	+	23
	Binary				-	24
					+	25
	Input			3
					-	26
				4	+	27
					-	28
	Power			VH	+ 13		DC
	Supply				-	12	DC
	Communications								Communications
	In								Out
		Data +				48	RS-485 SEAbus	49	Data -
								50	Reference
		RxD				(3)	RS-232	(2)	TxD
							Front Panel	(7)	Reference
									Ground

Figure 2.5 Internal Connections

Note: The relay disabled contact should be wired to plant-wide distributed control system or external alarm.

Siemens Energy & Automation, Inc. 7