User`s manual

System Controller module (QMC)
The System Controller module (QMC) provides an external
remote/control interface.
RS232/422
The RS232 port is used for 3
rd
party control of the BitLink Decoder.
To obtain protocol information, see Serial Control, page 35.
See Appendix A for pin-out.
Ethernet
The Ethernet connection is used for the Web interface (see page 25)
and to upgrade with new software.
Alarms/Control
The Alarms/Control connector is reserved for Alarm relays output and
future implementation of GPI.
The QMC has three alarm relays, one for warning alarms, one for minor
alarms and one for major alarms. Each relay is connected to three pins
on the Alarms/Control port. The three pins are called “common”, “A”
and “B”. When an alarm occurs there will be a short-circuit between
“common” and “A”. When no alarm is active there will be a short-
circuit between “common” and “B”.
common
A
B
common
A
B
Alarm active No alarm
The Alarms/Control port has two general purpose TTL inputs and two
general purpose TTL outputs.
See Appendix A for pin-out.
40 • Connections User's Manual