MSCDN – MP2A Performance Specification
3.6 Accuracy Influencing Factors
Temperature
Ambient range
-10°C to +55°C
Variation over range
≤
5%
3.7 Output Contacts
Output contacts functionality is fully programmable. The basic I/O module has 5 output contacts three of which are
change over. Additional modules can be added with consequential increase in case size, to provide more contacts.
These are added in-groups of eight up to a maximum of 29
3.7.1 Output Contact Performance
Contact rating to IEC 60255-0-2.
Carry continuously
5A ac or dc
Make and Carry
(limit L/R
≤
40ms and V
≤
300 volts)
for 0.5 sec
20A ac or dc
for 0.2 sec
30A ac or dc
Break
(limit
≤
5A or
≤
300 volts)
Ac resistive
1250VA
Ac inductive
250VA @ PF
≤
0.4
Dc resistive
75W
Dc inductive
30W @ L/R
≤
40 ms
50W @ L/R
≤
10 ms
Minimum number of operations
1000 at maximum load
Minimum recommended load
0.5W, limits 10mA or 5V
3.8 Status inputs
Status Inputs functionality is fully programmable. The basic I/O module has 3 status inputs, additional modules can
be added to provide more inputs, these inputs are added in-groups of eight up to a maximum of 27. A pickup timer is
associated with each input and each input may be individually inverted where necessary. The pickup timer may be
used to provide rejection at power system frequency.
Nominal Voltage
Operating Range
30 / 34
18V to 37.5V
48 / 54
37.5V to 60V
110 / 125
87.5V to 137.5V
220 / 250
175 to 280V
NB: the status input operating voltage does not have to be the same as the power supply voltage.
3.8.1 Status Input Performance
Minimum DC current for operation
48V 10mA
110V 2.25mA
220V 2.16mA
Reset/Operate Voltage Ratio
≥
90%
Typical response time
< 5ms
Typical response time when programmed to energise an
output relay contact
< 15ms
Minimum pulse duration
40ms
To meet the requirements of ESI 48-4 then 48V status inputs should be ordered together with external dropper
resistors as follows:-
Status Input External Dropper Resistances
Nominal Voltage
Resistor Value (Wattage)
110 / 125V
2k7 ± 5% ; (2.5W)
©2011 Siemens Protection Devices Limited
Chapter 2 Page 6 of 13
