GHM Delta OHM PMBsense-A, Руководство по эксплуатации

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PMsense
- 6 -
V1.0
Connector
pin N°
Function
CPM12-8DA…
wire color
1 Power supply negative (GND) Blue
2 Power supply positive (+Vdc) Red
3 Not used ---
4 RS485 A/- Brown
5 RS485 B/+ White
6 Digital and analog outputs ground (SGND)* Grey
7 Analog output 1 positve (AOUT1, only PM[B]sense-A ) Yellow
8 Analog output 2 positve (AOUT2,
only PM[B]sense-A
) Green
Cable shield ** Black (thick wire)
* The output ground (SGND) and the negative of the power supply (GND) are short-circuited
inside the transmitter.
* The cable shield is not connected to the M12 connector.
To ensure a good noise immunity, it is recommended to connect the cable shield to
ground (GND).
RS485 connection:
By default, the instrument has MODBUS address 1 and communication parameters
19200, 8E1. Different parameters can be set using the proprietary protocol or the
MODBUS-RTU protocol.
220Ω
220Ω
Shield Shield
Lmax = 1200m
B/+
A/-
B/+
A/-
SGND
GND
+Vdc
B/+
A/-
SGND
+
-
Fig. 3.3: RS485 connection
Power supply
7…30 Vdc
CPM12-8DA… cable
PLC, data logger or
RS485/USB or RS485/RS232
converter for PC
Other sensors with
RS485 output
Termination
Termination