NRG Systems 11174, Instructions Manual

Page: 15 / 21

NRG INSTRUCTIONS
SRA System | Soiling Measurement Kit
SRA Soiling Measurement Kit Instructions
Rev. 6.0 support@nrgsystems.com | Page 15
19 December 2018
2.6: Affix Interface Module to DIN rail & wire snesor signals to the logger wiring panel.
Attach the wired Interface Module onto the DIN rail and connect the other end of the 4C cable to the
wiring panel. Connect the two IMT back of the panel temprature sensors to the wiring panel.
The Soiling Measurement Kit consists of four inputs:

Two 0-30 V temperatures inputs - Temperature ‘CLEAN’ & Temperature ‘SOILED’:
o
Each input requires a #9135 P-SCM cards.
o
The sensor signals come from the IMT amplifier boxes.
o
Both sensors require 12v DC excitation voltage.

Two 0-5 V inputs PV inputs - I
sc
CLEAN and I
sc
SOILED:
o
Each input requires a #9132 P-SCM cards.
o
The sensor signals come from the Interface Module.
o
The I
sc
outputs require a single 12V excitation (EXC) and ground connection (GND).
Table 2-2 provides an example of how the sensor wires can be connected to the wirng panel (any
combination of P-SCM channels can be used ~ 20-26).
Channel Sensor Output Wire Color Terminal
21
Temprature
‘CLEAN’
Power + Red EXC
Power/Signal – Thin Black GND
Signal Output Brown SIG +
Sheild Thick Black SHD
22
Temprature
‘SOILED’
Power + Red EXC
Power/Signal – Thin Black GND
Signal Output Brown SIG +
Sheild Thick Black SHD
24
I
sc
CLEAN
Interface Module Power* Red EXC
Interface Module Ground* Black GND
IscCLEAN PV Signal Orange SIG +
26
I
sc
SOILED
IscSOILED PV Signal White SIG+
*Interface Module Power and Ground can be placed on either IscClean or IscSoiled channel
Table 2-2: Example Configuration