7
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6.0 Electrical connections
see figure Fig. 5 Voltage output and Fig. 6 Current ouput
EMC recommendations for wiring
The requirements of EMC standards as specified in the technical data are only fulfilled with the probes connected
either directly or with Setra original extension cables to SRH400.
• SRH400 with metal enclosure must be grounded either at the designated points on the inside, or outside at the
mounting plate. The probe must not be grounded; it must be electrically isolated from the GND.
• Locate the SRH400, the probe cable and the output cables as far as possible from sources of electromagnetic
disturbances.
• For the analogue outputs use either shielded or twisted cable pairs. The shield shall be grounded at one end
only, preferably at the controller side.
• Cable loops may impact on the EMC behavior of SRH400. Keep all cables as short as possible. Unused wires
shall be grounded at both ends. Run all cables as close as possible to the ground potential, for instance close to
the walls or steel structure elements.
power supply
for 0 - 1 V: 10 - 35 V DC
9 - 29 V AC
for 0 - 10 V: 15 - 35 V DC
15 - 29 V AC
power supply
20...35 V DC; R
L
<500 Ω
11...35 V DC; R
L
< 50 Ω
3
4
1
2
5
SRH400 - Analog volts
SRH400 - Analog millamps
6.1 Connection diagram
Figure 5.
Figure 6.