CR-PVS1 PV Soiling Loss Index RTU
4
5.2 Short-Circuit Current Measurements
Current Shunt
Maximum Operating
Temperature:
80 °C
Shunt Accuracy:
±0.25%
5.3 Communications
Modbus RTU
Format:
RS-232, 19200 bps, 8 data bits, even
parity, 1 stop bit
Supported Functions:
03
Modbus Address:
11
Data Type:
32-bit float, CDAB
Internet Protocols:
PPP, ICMP/Ping, Auto-IP(APIPA), IPv6,
UDP, TCP, TLS, DHCP Client, SLAAC,
DNS Client, Telnet
Additional Protocols Supported:
PakBus, SDI-12, Modbus RTU, Modbus
ASCII, Modbus TCP/IP, DNP3 (Custom
user-definable over serial.)
USB:
USB micro-B device only, 2.0 full-speed
12 Mbps, for computer connection.
RS-232:
Female RS-232, 9-pin interface
5.4 System
Clock Accuracy:
±1 min per month
Clock Resolution:
1 ms
Program Execution Rate:
30 s
5.5 Power Requirements
Charger Input (CHG):
16 to 32 VDC, current limited at 0.9 A.
Power converter or solar panel input.
External Batteries (BAT):
12 VDC, lead-acid 7 Ah battery, typical
Internal Lithium Battery:
3 V coin cell CR2016 (Energizer) for
battery-backed clock. 6-year life with no
external power source.
Typical Power Requirements
1.5 mA
Idle:
Active 1 Hz scan with
analog
ue
measurements:
5 mA
USB Power (USB):
For programming and limited functionality