User manual

SNMP-1000-B2 User Manual 10
The last digit (4) of the DIP switch is used to enable or disable the temperature sen-
sor.
Enable
Disable
2.2.7 RS-232 Interface (CN8 and CN9)
The serial port can be used as a console port or connected to an external modem
that supports a telephone line. CN9 is a standard DB-9 port for external wiring; CN8
is a box header for internal wiring.
2.2.8 LCM Message Display Connector (CN10)
An optional LCM message display module is available for displaying messages. The
input key on the LCM module can be used for on-site setup. CN10 is the LCM mod-
ule interface.
2.2.9 Kernel Board Connectors (CN11 and CN12)
CN11 and CN12 are used to piggyback the kernel module.
2.2.10 Backplane Voltage Input Connector (CN13)
This connector is used for detecting voltages on the backplane. An 8-pin connector
on the backplane can be directly cabled to CN13 to simplify the wiring.
2.2.11 Digital Input Connectors (DI1 ~ DI8)
SNMP-1000-B2 can monitor up to eight TTL-level digital signals. These digital inputs
can be used to detect external devices or identify a health status, such as chassis
intrusion. These connectors are not available for the chassis carrier board.
Note A unique “null modem” cable is required to connect the module serial
port to a PC serial port. Please ensure that the cable features reversed
Tx and Rx signals at one end and only Pins 2, 3, and 5 are connected.
This type of cable is available from Advantech (part number
1700091801). If other pins are connected, SNMP-1000-B2 will identify
the RS-232 connection as a modem connection and terminate it imme-
diately.