Protections - Samlexpower SEC-40BRM-220 Installation & Operating Manual

REMOTE MONITORING AND SIGNALLING
A provision has been made for remote signaling and monitoring of the following operational
conditions and parameters:
1. Operational status of the 5 Power Supply Modules (PSM)
2. Failure condition of the cooling fan(s)
3. Availability of AC input power
4. Output voltage measurement
5. Output current measurement ( Voltage across an internal shunt with Shunt ratio of 50
mV / 100 A or 0.5 mV per Amp)
Signaling of operational conditions as at serials 1, 2 and 3 above is opto coupled with open
collector, NPN transistor outputs. The collector and emitter of each opto coupled transistor are
accessible to the external user interface through the 25 pin D-Sub connector. Each open collec-
tor, opto coupled NPN transistor can provide a maximum of 50 mA with a collector to emitter
voltage of up to 35 V.
Outputs for voltage and current measurements at Serials 4 & 5 above are direct analogue volt-
ages. The pin out of the 25 pin D-Sub connector providing the above signals for user interface
is given below:
Item Pin
No.
1
16
2 12
19
3
20
4
21
5
22
6 10
23
7 11
24
8 25
13
9 18
* This signal is the voltage across an internal shunt at 0.5 mV per Amp (Shunt Ratio is 50 mV / 100 A)

PROTECTIONS

SHORT CIRCUIT PROTECTION: In the event of a short circuit, the PWM controller will be shut down and
the output will drop to near 0 V. The green LEDs will flash. The unit will reset automatically once the short
circuit condition is removed
CURRENT LIMITING: The unit will enter this mode when the load tries to draw more than the limiting values
of currents as shown in the specifications. Under this condition, there will be loss of voltage regulation and
the output voltage will drop. The "PSM STATUS" LEDs will, however, remain illuminated, but dimmed. When
the overload reaches approximately 140A for SEC-100BRM-220 or 112A for SEC-80BRM-220 or 84A for
SEC-60BRM-220 or 56A for SEC-40BRM-220 (the output voltage will be approximately 2.7V), the unit will
shut down (will enter hiccup mode). The PSM status LEDs will start flashing and PSM status signal for re-
mote indication will oscillate between High and Low. The unit will reset automatically as soon as the
overload condition is removed .
INPUT SURGE PROTECTION : The unit is protected against input voltage surges. In case of input spike/
surge, the A.C. side breaker will trip. The 4A fuse on the module will also blow.
Color Code Output Pin of
of Wire Opto-coupler
2 Black Collector
White Emitter
Orange Collector
Green Emitter
7 Gray Collector
Violet Emitter
8 Violet Collector
Blue Emitter
9 Blue Collector
Green Emitter
Green Collector
Yellow Emitter
Yellow Collector
Orange Emitter
Red -
Black -
Gray -
6 Blue -
5.
Operational Condition
or Parameter (High)
AC input is available
Fan failure
PSM 1 Normal
PSM 2 Normal
PSM 3 Normal
PSM 4 Normal
PSM 5 Normal
Voltmeter +
Voltmeter -
* Ammeter +
* Ammeter -