LPPYRHE16
- 11 -
V2.3
4.5
LPPYRHE16ACS
CONNECTIONS
The pyrheliometer LPPYRHE16ACS has two outputs:
•
One 4…20 mA output, requiring 10…30 Vdc external power supply. It is to be
connected to a power supply and an instrument with 4…20 mA input as shown in
fig. 4.6. The load resistance of the instrument reading the signal must be
≤
500 Ω
.
•
One RS485 Modbus-RTU output, requiring 5…30 Vdc external power supply.
It is to be connected to a power supply and to a PLC, a data logger or a
RS485/USB or RS485/RS232 converter for PC as shown in fig. 4.5. The RS485
output is not isolated.
Connector
Function
Color
1
Power supply negative (GND)
Blue
2
Power supply positive (+Vdc)
Red
3
Digital and analog ground
(SGND)
Black
4
RS485 A/-
Brown
5
RS485 B/+
White
6
Housing / Cable shield (SH)
Black (thick wire)
7
Analog output positive (AOUT)
Green
8
Not connected
Fig. 4.6: LPPYRHE16ACS connections
Before connecting the pyrheliometer to the RS485 network, set the address and the
communication parameters, if different from the factory preset (see chapter 6).
Power supply
CPM12-8DA… cable
Sensor M12
male connector
PLC, data logger or
RS485/USB or
RS485/RS232
converter for PC
Other sensors with
RS485 output
Connect to ground only if it is not possible to
ground locally the housing of the pyrheliometer
