GE Industrial Solutions CPS3200U - Manual (Page 50)

CPS3200U Upstream System – 23” Product Manual CPS3200U
CC848779826 r09 December 2013 50
CPS3200U Shelf Alarm Card State Table
This section shows Alarm and LED response for the Alarm Card LEDs and Relays.
The CPS3200U shelf contains a pair of A bus feeds and a pair of B bus feeds. The use of dual A and B feeds is to not
exceed the 48 AMPS L2 input current per feed. The A bus feeds are designated A
1-8
and A
9-16
, and power shelf slots 1-8
(left side) and 9-16 (right side) respectively. The B bus feeds are also designated in an identical fashion. The alarm card
monitors the -48v on each of these four feeds, and asserts alarms and indicators as follows:
Table 9 Shelf Alarm Card State
-48 V INPUT BUS Vin LEDs STATUS LEDs ALARM RELAYs
A
1-8
B
1-8
A
9-16
B
9-16
A LED B LED OK LED ALM LED PMN PMJ
OK OK OK OK GRN GRN GRN OFF E E
LOW OK OK OK RED GRN OFF YEL D E
OK LOW OK OK GRN RED OFF YEL D E
OK OK LOW OK RED GRN OFF YEL D E
OK OK OK LOW GRN RED OFF YEL D E
LOW LOW OK OK RED RED OFF RED E D
LOW OK LOW OK RED GRN OFF RED E D
LOW OK OK LOW RED RED OFF RED E D
OK LOW LOW OK RED RED OFF RED E D
OK LOW OK LOW GRN RED OFF RED E D
OK OK LOW LOW RED RED OFF RED E D
LOW LOW LOW OK RED RED OFF RED E D
LOW LOW OK LOW RED RED OFF RED E D
LOW OK LOW LOW RED RED OFF RED E D
OK LOW LOW LOW RED RED OFF RED E D
LOW LOW LOW LOW OFF OFF OFF OFF D D
Alarm Relay: E – Energized relay in non-alarm state; D – De-energized relay in alarm state
Alarm Card Logical Operation of LEDs and Alarm Relays
The Alarm Card contains a pair of form C relays to provide shelf PMN and PMJ isolated closures. The relays are
energized, from both the A & B input bus, in their non-alarmed state, such that these relays will revert to the alarm state
if both A and B input fail. The relay circuit interfaces to a pair of parallel buses connected to each of the 16
Converter/Limiter Cards. Each Converter has an open collector output on the bus, and pulls the bus low to chassis
ground when it is asserting an alarm. The PMN/PMJ circuit on the Alarm card recognizes the bus state change and
denergizes the relay. The alarm card separately monitors both the PNM and PMJ bus. When the PMN bus is active
(pulled low), the Alarm card asserts a PMN relay and lights the ALM LED Yellow. When the PMJ bus is active (pulled low),
the Alarm card asserts a PMJ relay and lights the ALM LED Red. While an active PMJ is present the Alarm Card ignores
the state of the PMN bus (and does not assert a PNM relay/LED action). This IS necessary since the same LED is used for
both Minor (Yellow) and Major (Red) visual indication.
The Alarm Card also monitors the -48V dc inputs and asserts PNM/PMJ for conditions as described in the earlier section
dealing with input voltage monitoring.
The Alarm Card also monitors the two fan tray alarms. When either of the two fan tray alarms is active, the Alarm Card
asserts a PMN relay and Yellow ALM LED. When both of the fan tray alarms are active, the Alarm Card shall assert a PMJ
relay and Red ALM LED.
The Alarm Card shall also monitor its internal I
2 C to RS-485 conversion processor. A failure of this processor shall
constitute a PMN condition.