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2.7
Remote Equalize
A terminal is provided on charger for a Remote Equalize function. For standard chargers, the Remote Equalize
terminal is labeled “RE” and is located on the TS-5 terminal as shown on Figure 13. For chargers with the S2A-
406 board, the Remote Equalize terminal is on terminal 5 of J4 as shown on Figure 14. Connections can be made
by using a 16 AWG wire. The charger may be remotely forced into Equalize by connecting the Remote Equalize
terminal to negative.
When chargers are connected for Load Sharing, they must also be set up to switch into Equalize at the same
time. This can be accomplished by using the Remote Equalize function of the charger. In addition to wiring the
Load Share wire, the chargers’ Remote Equalize terminals must be connected together for Remote Equalize.
In a system, all charger Remote Equalize terminals are connected together and when any one master charger is
put into Equalize, all chargers will go into Equalize and the display will read “in Remote Equalize.” To return to
Float Mode, the master charger must be returned to the Float Mode.
CAUTION:
Damage to the unit will result if the Remote Equalize terminals are shorted to any other AC or DC
voltage source or ground on positive grounded chargers.
NOTE:
Remote Equalize can only be used with other TPSD2 chargers of the same output voltage and current.
2.8
Remote Voltage Sensing
Provisions for remote DC voltage sensing are provided. The sensing circuit is activated when wires from the
battery or load are brought back to the Remote Sensing terminals of the charger. For standard chargers, the
Remote Sensing terminals are labeled “RS+” and “RS-” and are located on the TS-5 terminal as shown on Figure
13. For chargers with the S2A-406 board, the Remote Sensing terminals are on terminals 1 & 2 of J5 as shown
on Figure 14. Connections can be made by using a 16 AWG wire.
The positive remote sensing lead should contain an external 1 Amp fuse for negative ground system. The negative
remote sensing lead should be fused for positive ground system. When remote sensing is wired, the unit output
may have to be readjusted to compensate for the protection diodes on the circuit board.
CAUTION:
The polarity of the Remote Sensing terminals is critical. Check and verify the polarity carefully.
2.9
Ground Detection
Ground Detection is available on TPSD2 chargers. The purpose of Ground Detection is to determine if the battery
or loads have become grounded. If the battery or loads are set up as floating, it is recommended that Ground
Detection be enabled. When Ground Detection is enabled, a positive or negative ground fault indicator will
energize upon detection of the specified ground. The Ground Detection circuitry monitors amount of ground
current, whether it is positive of negative, and will alarm when the threshold of 1.5mA is reached (or exceeded).
TPSD2 chargers are shipped from the factory with Ground Detection enabled by default. It is recommended that
Ground Detection be disabled if the battery or loads are either positively or negatively grounded. The charger will
indicate a ground fault at all times if the system is known to be grounded and the Ground Detection is enabled.
For TPSD2 chargers which are set up to load share, only one charger should have Ground Detection enabled. All
other chargers must have Ground Detection disabled (see below for steps). If an external Ground Detection
system is used, the TPSD2 Ground Detection must be disabled.
NOTE:
La Marche Mfg. Co. is primarily a manufacturer of battery chargers and not ground detection systems. If
a more precise system is required, many systems that are designed specifically for ground detection are
compatible with La Marche battery chargers.
