Bosch Appliances X20 Terminal Block, Pin Assignment

116 en AppendixVideoJet X20

8.7	Terminal Block
	The terminal block has several contacts for:
	–	4 alarm inputs
	–	4 relay outputs
	–	Serial data transmission
8.7.1	Pin Assignment
	The pin assignment of the serial interface depends on the interface mode used (see
	Section 5.27 COM1, page 74).
	Contact		RS232 mode		RS422 mode	RS485 mode
	CTS		CTS (clear to send)		RxD- (receive data minus)	Data-
	TXD		TxD (transmit data)		TxD- (transmit data minus)
	RTS		RTS (ready to send)		TxD+ (transmit data plus)	Data+
	RXD		RxD (receive data)		RxD+ (receive data plus)
	GND		GND (ground)		—	—
	Contact			Function
	IN1			Input alarm 1
	IN2			Input alarm 2
	IN3			Input alarm 3
	IN4			Input alarm 4
	GND			Ground
	R1			Relay output 1
	R2			Relay output 2
	R3			Relay output 3
	R4			Relay output 4
	RM1			LED remote indicator
	RM2			LED remote indicator
	BP			Backup power supply
	GND			Ground
	+			10 to 30 V (power supply)
	–			Ground

Connect each alarm input to a ground contact (GND) when connecting alarm inputs. For the RM1 and RM2 contact specifications, see Section 4.3.10 Remote Indication of the Connection Status, page 23.

For the backup power supply specifications, see Section 4.3.11 Backup Power Supply, page 24.

V3.5 2007.12 Installation and Operating Manual Bosch Security Systems