SENS IQ Technical Manual
24
Service Hotline: 1.800.742.2326
1.303.678.7500
See Section 8.
6
.2 to adjust alarm settings. Alarms are displayed on the front panel LCD (see
FIG 4
) and often via
LED and/or alarm relay contacts.
When Temperature Compensation is active, the DC output voltage is temperature compensated, however alarm
threshold levels are not.
1.
BATTERY REVERSE POLARITY
- An audible alarm (beeping tone) indicates the battery is connected
backwards. Disconnect the AC power source and correct the reverse polarity problem. Activates red DC
SYSTEM ALARM LED, red BATT CHCK LED and red BATTERY LED.
Summary relay changes to Fail
state. These indications require AC power on. Silencing the audible alarm feature does not silence this alarm.
2.
LOW DC
- Indicates DC output voltage is below a programmed level. Activates red
DC SYSTEM ALARM
LED and yellow
DC VOLTS LED.
Summary relay changes to Fail state. Optional Alarm
Relay
Printed Cir-
cuit Board relay K6 changes to Fail state.
3.
HIGH DC
- Indicates DC output voltage is above a programmed level. Activates red
DC SYSTEM ALARM
LED and red
DC VOLTS LED.
Summary relay changes to Fail state. Optional Alarm
Relay
Printed Circuit
Board relay K3 changes to Fail state.
4.
OVER VOLTAGE SHUTDOWN
- Indicates that the charger has executed a high voltage shutdown. Acti-
vates red
CHARGER ALARM LED, red
CHARGER LED and red DC VOLTS LED.
Summary relay changes
to Fail state. The charger disables itself whenever the output voltage exceeds the over voltage shutdown
threshold and the charger is delivering current. Over Voltage Shutdown cannot be disabled, but is protected
9.3 Alarm
Definitions
9.2
Individual Relay Alarm Contacts—Optional
Two different individual alarm relay package options are available, only one of which can be installed at a
time. The Standard
Alarm Relay Printed Circuit Board
offers five alarm discrete Form C contacts. The
Extended Alarm Relay Printed Circuit Board
offers seven discrete Form C contacts plus a pilot relay.
The form C relay contacts change state when alarms are activated (see
FIG 3
). The relay contacts change
state a user-selectable time period after the onset of a fault, except the AC FAIL relay which activates
immediately
. In the event of a second alarm, the delay will not start over. Instead, the second alarm relay
will change state after the original alarm delay.
The alarm relay contacts change state as described in
Section 9.3.
See
TABLE 4
for alarm contact designations.
The Extended Alarm Relay Printed Circuit Board also includes one pilot relay that automatically closes
when the charger
enters EQUALIZE mode
, and opens when the charger
reverts to FLOAT mode (see
FIG
3
). See Section 8.3.2 for more information on EQUALIZE mode.
When an
optional Alarm Relay Printed Circuit Board is used the ‘SUMMARY’ alarm (located on Control
Printed Circuit Board) continues to function. The charger includes two separate microprocessors, one in
control of the ‘SUMMARY’ alarm and the other in control of the individual relays. Users are encouraged
to connect both the ‘SUMMARY’ and individual relay alarms to provide redundant
alarm notification.
9.1
Summary Alarm Contact
The charger provides a ‘SUMMARY’ form C relay, which changes state if
any of several
alarm conditions
exist
, as described in Section 9.3
. The relay changes state a user-settable time period, ranging from 5 to 50
seconds (see Section 8.6.2), after the onset of a fault and is located on the Control Printed Circuit Board
(see
FIG 3
). The ‘SUMMARY’ relay allows the user to monitor several alarms at once with one set of
contacts.
See
TABLE 4
for alarm contact designations.
A
‘SUMMARY’
relay tripped by a Battery Check test failure is reset by pressing the front panel
ENTER/BACK button twice or upon successfully passing a new Battery Check test.
9 ALARMS
