Operation manual of solar controller SR658
Page 10 of 105
Communication port 485
：
ELA485, for remote control communication( function not available
now)
FRT
：
For Rotary blade electronic flowmeter
VFS
：
For Grundfos flowmeter sensor
Advice regarding the installation of temperature sensors:
①
Only original factory equipped Pt1000 temperature sensors are approved for using with
the collector, it is equipped with 1.5m silicon cable and suitable for all weather
conditions, the cable is temperature resistant up to 280oC, connect the temperature
sensors to the corresponding terminals with either polarity.
②
Only original factory equipped NTC10K, B=3950 temperature sensors are approved for
using with tank and pipe, it is equipped with 3m PVC cable, and the cable is temperature
resistant up to 105
o
C, connect the temperature sensors to the corresponding terminals
with either polarity.
③
All sensor cables carry low voltage, and to avoid inductive effects, must not be laid close
to 230 Volt or 400 Volt cables (minimum separation of 100mm).
④
If external inductive effects are existed, e.g. from heavy current cables, overhead train
cables, transformer substations, radio and television devices, amateur radio stations,
microwave devices etc., then the cables to the sensors must be adequately shielded.
⑤
Sensor cables may be extended to a maximum length of ca. 100 meter, when cable’s
length is up to 50m, and then 0.75mm
2
cable should be used. When cable’s length is up
to 100m, and then 1.5mm
2
cables should be used.
Output terminal
Input Ports L, N: for power connection, L: live wire, N: zero wire, protective ground wire
Output R1: Semiconductor relays (SCR), designed for pump speed control, Max. Current: 1A
Output R2: Semiconductor relays (SCR), designed for pump speed control, Max. Current: 1A
Output R3: Semiconductor relays (SCR), designed for pump speed control, Max. Current: 1A
