Multichannel Systems ME-System Manual - Manual (Page 16)

ME-System Manual
16
2.5 Supply Power and Recommended Setups
In the standard ME-FAI-Systems, the isolated power supply IPS10W that is preinstalled on the
data acquisition computer delivers the power for the amplifiers (MPA and FA), distributed via
68-pin MCS high grade cable. One of the limiting factors when using the IPS10W is the voltage
drop of the 3 m MCS high grade cable. The characteristic resistance of the cable is 0.3 Ohms per
meter. This results in a 1 Ohm resistance for a 3 m cable, leading to a voltage drop of 500 mV
for a 500 mA current (U = R * I = 1
 * 500 mA = 500 mV). As the voltage drop limit is 500 mV,
the limit for each cable is ± 500 mA.
Warning: Follow the manufacturer’s setup recommendations. Do not use longer cables
than recommended. Do not connect other amplifiers or more amplifiers than recommended.
A voltage drop exceeding the limit of ± 500 mA can lead to improper behavior of the amplifier,
or can even melt the wire!
The following tables show you how much power the amplifiers need, and how much power
the MCS power supplies will provide.
Amplifier Supply voltage Supply current
MPA2I < ± 2 mA, typically ± 1 mA
MPA8I < ± 6 mA, typically ± 4 mA
MPA32I(FLEX)
± 3 V to ± 8 V DC
< ± 14 mA, typically ± 9 mA
FA8 < ± 40 mA, typically ± 25 mA
FA16 < ± 75 mA, typically ± 50 mA
FA32 < ± 150 mA, typically± 100 mA
FA48 < ± 225 mA, typically ± 150 mA
FA64
± 6 V to ± 9 V DC
< ± 300 mA, typically ± 200 mA
PGA16 350 mA (positive rail), 110 mA (negative rail)
PGA32 550 mA (positive rail), 225 mA (negative rail)
PGA64 725 mA (positive rail), 450 mA (negative rail)
PGA1632 550 mA (positive rail), 225 mA (negative rail)
PGA3264
± 5.7 V to ± 12 V DC
725 mA (positive rail), 450 mA (negative rail)
Power supply Supply voltage Supply current
IPS10W (internal power supply) ± 6.3 V ± 10 % max. 1.2 A @ + 6.3 V
or – 6.3 V
PS40W (external power supply) ± 7 V ± 10 % max. 2.5 A @ ± 7 V