Samlex America SEC-2425UL - Manuel (Page 24)

24 | SAMLEX AMERICA INC.
ReMote contRol PAnel Model no. 900-Rc
Fig 7.4 Remote Control Panel Model No. 900-RC
An optional wired Remote Control Panel Model No. 900-RC (Fig 7.4 above) can be
ordered. It comes with 10 meters of RJ-45, 8P8C Modular, Straight cable . It is plugged
into the Remote Control Jack (6). The Remote Control Panel can be used to switch ON
/ switch OFF the charger and also monitor the charging status of the charger from a
remote location. Please read the manual for the optional Remote Control Panel 900-RC
for related indications.
seCtIOn 8 | Operation
!
cAUtion!
Negative Temperature Coefficient (NTC) thermistors are used in series with the AC input
circuit to limit very large spike of inrush current drawn by input side capacitors, which act
almost like a short circuit during the first half cycle after the charger is switched ON. When
charger is switched ON, NTC is in cold state, its resistance is high and hence, the inrush cur-
rent spike is suppressed to safe level. It heats up very fast and its resistance drops to almost
zero. It remains in heated condition as long as the charger remains switched ON. When
the charger is switched OFF, the NTC requires around 2 to 3 min to cool down and reset its
resistance to high cold state value for spike suppression the next time it is needed. The fol-
lowing precautions are to be taken to prevent damage to the NTC and to the input circuit:
• Do not switch ON, switch OFF and Switch ON the charger in quick succession. After switch-
ing OFF the charger, wait for at least 5 minutes before switching ON again to allow cool-
ing down of the NTC
• When powering the charger from a generator, allow the generator to warm up and
stabilize in voltage before switching ON the charger. If the charger is in ON condition and
the generator is started, high voltage transients produced by the generator during startup
may damage the NTC
seCtIOn 7 | Preparing the Charger for Operation
Remote
Panel
Cable
with plug