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When units are connected in parallel using an RJ45 cable to connect between the alarm and control interface,
the alarm outputs on the Alarm Card give the status of all the connected units. This means that you only need
one alarm card connected to the external alarm circuitry when the units are connected in parallel.
The diagram on the following page describes the alarm contacts found on the right side of the unit.
Load
+
+
-
High V
Low V OFF NML
NC NO NO NC NC NO
NC = Normally Closed
NO = Normally Open
Refer to Section 4.9 for information on adjusting the alarm output volt low/high settings.
2.6.1
Relays
The relays are Single Pole Double Throw (or changeover). Both Normally Closed (NC) and Normally Open (NO)
contacts are provided. Contact rating is 100v DC, 1A max and all contacts are isolated from the rectifiers' internal
circuitry. Do NOT connect AC supply to the relays.
When the SPS is operating normally (ie with no fault, or abnormal conditions) the relay outputs designated NC will
be connected to the common terminal, and the relay outputs designated NO will be open circuit. Upon an alarm
condition occurring the NO contacts will be connected to the common terminal, and the NC contacts will be open
circuit.
The internal alarm card is powered from the batteries connected to the units. This allows the alarm card to
operate correctly even when the AC power has failed.
The internal alarm card is powered from the batteries connected to the SPS. This allows the alarm card to operate
correctly even when the AC power has failed.
If the rectifier does not have a battery connected and the AC fails, then the AC Fail relay still reflects the state of
the AC power, however; the Rectifier Fail alarm, Rectifier Off Normal and the Low Volts alarms will also activate.
Note that the AC Fail Relay has its own "Common" connector, but all the other alarm outputs share a "Common"
contact.
2.6.2
Rectifier Fail/Mains Fail
The AC Fail Alarm is activated while the mains power is not present.
The Rectifier Fail Alarm can be configured to activate when the AC has failed (as well as when the Rectifier
Fails). Alternatively, the Rectifier Fail can be configured to not activate if the mains fails, so that you can remotely
determine if the problem is the mains failure or a rectifier failure.
The diagram below shows the jumper configuration for AC Fail/Rectifier Fail options (opening on rear of SPS).
P.O. Box 1306
Newport Beach
California 92663
Battery
BATTERY TEMP
-
+
+
-
-
REMOTE SENSOR
COM R FAIL
Alarm
Contacts
C
NO NC NO NC C
Common contacts for all
alarms (except AC Fail)
TEMP PROBE CONNECTED = G
RECTIFIER FAIL = R
AC Fail
Monitor
CURRENT LIMIT = Y
Dry contacts for AC
IN SHUTDOWN MODE = R
Fail status
BATTERY FLOAT = G
AC ON
BATTERY BOOST = Y
AC Input
Phone: 714-751-0488
Fax: 714-957-1621
E-Mail: techservice@newmarpower.com
8
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