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66 en | Appendix VIP XD
DOC | V4.0 | 2009.06 Installation and Operating Manual Bosch Security Systems
8.5 Serial Interface
Options for using the serial interface include transferring transparent data, controlling
connected units or operating the unit with a terminal program.
The serial interface supports the RS-232/RS-422/RS-485 transmission standards. The mode
used depends on the current configuration (see Section 5.17 COM1, page 43). Connection is
via the terminal block.
8.6 Terminal Block
The terminal block has several contacts for:
– 4 alarm inputs
–1 relay output
– Serial data transmission
Pin Assignment
The pin assignment of the serial interface depends on the interface mode used (see
Section 5.17 COM1, page 43).
Connect each alarm input to a ground contact (GND) when connecting alarm inputs.
Contact RS-232 mode RS-422 mode RS-485 mode
CTS CTS (clear to send) RxD- (receive data minus) Data-
RTS RTS (ready to send) TxD- (transmit data minus)
RXD RxD (receive data) RxD+ (receive data plus) Data+
TXD TxD (transmit data) TxD+ (transmit 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
R Relay Output
+ 12 to 24 V DC (power supply)
–Ground