CTI Products EXB-232 Asynchronous Serial System Extender - Manual (Page 12)

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2.2 The EXB-Serial Unit
The EXB-Serial unit contains user accessible connectors, indicators and controls to allow
efficient use of the module. This section describes the function of each item. More detail of the
use of each is in section 3. See Appendix A for connector specifications and pinouts.
EXB Serial Front Panel
CA-80283-105
1 2 3 4 5 6 7 8 ON
OPTION A
DC IN
ERR
ACT PWR NETWORK OUT IN
RSVC CSVC
RESET
CMD
NCB NETWORK COMBINER
NETWORK
Figure 3 EXB-Serial Module Front Panel
"DC IN" connector -- The primary power entry point for the EXB-Serial module.
"NETWORK" connectors -- connection point for the MCN network. Pins 1 and 2 of both
RJ45 connectors are wired in parallel. The dual RJ45 connector designates "IN" and "OUT".
These designations apply only to DC power that is passed down unused pairs of the 4 pair
network cable. The two pins carrying the network pair are straight-through. NOTE: Previous
versions of the EXB-Serial module do not have both RJ45 and terminal strip connectors mounted
simultaneously, rather were provided with only a dual RJ45. The two pin terminal strip
connector is not used with the MCN family products.
"PWR" LED (Green) -- Indicates when power is present to the EXB-Serial module. Flashes if
DC input to module is below minimum required voltage.
"ERR" LED (Red) -- Indicates either:
• Always On: a diagnostic error has occurred.
• Slow Flash or Always On: insufficient configuration information is present.
• Quick Flash: the DSR handshake signal of a serial port configured for use (BAUD
switch set other than 0) is inactive.
"ACT" LED (Yellow) -- Indicates a packet has been passed by the EXB-Serial router.
"RESET" button-- Hardware reset for the entire EXB-Serial module.
"CSVC" pushbutton -- reserved -- Used during configuration of custom engineered systems.
See the custom configuration documents for your system.
"RSVC" pushbutton -- reserved -- Used during configuration of custom engineered systems.
See the custom configuration documents for your system.