S&C Instruction Sheet 661-500 29
Appendix B
Table 9. J3 Connector Input Definitions
Upper Row
Pin Number
Connection Name
Description
1
PHASE 1 VOLTAGE SENSOR NEUTRAL
Phase 1 input current return from S&C voltage sensor
2
PHASE 1 VOLTAGE SENSOR LINE
Phase 1 input current from S&C voltage sensor
3
PHASE 3 VOLTAGE SENSOR NEUTRAL
Phase 3 input current return from S&C voltage sensor
4
PHASE 3 VOLTAGE SENSOR LINE
Phase 3 input current from S&C voltage sensor
5
PHASE 2 VOLTAGE SENSOR NEUTRAL
Phase 2 input current return from S&C voltage sensor
6
PHASE 2 VOLTAGE SENSOR LINE
Phase 2 input current from S&C voltage sensor
7
NO CONNECTION
–
8
AC INPUT NEUTRAL
Single-phase 120-Vac input connection
9
AC INPUT LINE
10
EARTH GROUND
Lower Row
Pin Number
Connection Name
Description
11
(+24) VDC OUTPUT
Positive supply to RTU
12
(+24) VDC OUTPUT
13
(+24) VDC OUTPUT
14
OVER VOLTAGE INDICATOR NO 1
Relay dry contacts for battery
Over Voltage condition indicator . The relay will
turn on when the battery voltage is over 34 V . The battery will be disconnected
from the charger . The relay will be latched until conditions are cleared .
15
OVER VOLTAGE INDICATOR COMMON 1
16
OVER VOLTAGE INDICATOR NC 1
17
OVER VOLTAGE INDICATOR NO 2
Relay dry contacts for battery
Over Voltage condition indicator . The relay will
turn on when the battery voltage is over 34 V . The battery will be disconnected
from the charger . The relay will be latched until conditions are cleared .
18
OVER VOLTAGE INDICATOR COMMON 2
19
OVER VOLTAGE INDICATOR NC 2
20
(+)24 VDC OUTPUT
Positive supply to RTU
Table 10. J4 Connector Input Definitions
Upper Row
Pin Number
Connection Name
Description
1
UNDER VOLTAGE INDICATOR COMMON 1
Relay dry contacts for
Battery Under Voltage condition indicator . The relay will
turn on when the battery voltage is below 23 V when an ac source is present
and 22 V when an ac source is not present . The relay will be latched until
conditions are cleared .
2
UNDER VOLTAGE INDICATOR NO 1
3
UNDER VOLTAGE INDICATOR NC 1
4
BAT CHECK INDICATOR COMMON 2
Relay dry contacts for
Battery Test indicator . The relay will turn on during the
battery test and turn off when the battery test is complete .
5
BAT CHECK INDICATOR NC 2
6
BAT CHECK INDICATOR NO 2
7
BAT CHECK INDICATOR NO 1
Relay dry contacts for
Battery Test indicator . The relay will turn on during the
battery test and turn off when the battery test is complete .
8
BAT CHECK INDICATOR NC 1
9
BAT CHECK INDICATOR COMMON 1
10
OC INDICATOR NO 1
See details on pin 19 and 20
Lower Row
Pin Number
Connection Name
Description
11
UNDER VOLTAGE INDICATOR NO 2
Relay dry contacts for
Battery Under Voltage condition indicator . Relay will
turn on when the battery voltage is below 23 V when an ac source is present
and 22 V when an ac source is not present . The relay will be latched until
conditions are cleared .
12
UNDER VOLTAGE INDICATOR NC 2
13
UNDER VOLTAGE INDICATOR COMMON 2
14
(+)24 VDC OUTPUT
Positive supply to RTU
15
(-)24 VDC OUTPUT
Negative supply to RTU
16
AC INDICATOR COMMON 2
Relay dry contacts for an ac source being present . The relay will turn on when
there is no ac source (either 120 Vac or three-phase current source) supplying
the charger . The relay will be latched until conditions are cleared .
17
AC INDICATOR NC 2
18
AC INDICATOR NO 2
19
OC INDICATOR COMMON 1
Relay dry contacts for
Open Cell or Battery Not Connected condition
indicator . Relay will turn on when there is no battery connected to charger or if
a battery has open cell(s) . The relay will be latched until the alarm is reset .
20
OC INDICATOR NC 1