Valmet Valmet MCA, Инструкция по установке и эксплуатации, Страница: 12 / 66

2.3. Sensor Electronics
Sensor electronics is the same for both Fork and
Flowthrough sensors. Refer to figure 6. The sensor
electronics card is installed between the round cover
and base. The electronics includes the microwave
transmitter and receiver as well as control, measure-
ment and communication electronics.
On the bottom there are snap-on connectors, which
connect with antenna cable connectors in the base
plate when you press the electronics against the base
plate. The guide pins in the base plate help guide the
connectors into place. The Pt-100 connector and the
supply voltage / serial communication connector are
connected into the connectors located in the cover of
the sensor electronics.
2.4. Transmitter Central Unit (TCU)
TCU is Valmet MCA's user interface and calculator.
Perform operations using the number buttons and other
buttons and the four-line display. The TCU is delivered
attached to the shield, as shown in figure 5.
Connectors:
– For the sensor unit, sensor electronics supply
voltage and RS485 serial port connectors.
– For the current outputs (passive). From TCU Rev B,
2 current outputs.
– For HART communicator. (HART only in the current
output 1.).
– For RS232 connection to a PC (for maintenance
purposes).
– For network voltage.
Fig. 5. Transmitter Central unit.
1
2
3
4
5
Fig. 6. Sensor Electronics: 1. Power Cable Connector, 2. Fixing Screw, 3. Pt-100 Connector, 4. Guide hole, 5.
Antenna Cable Connectors.
Installation & Owner’s manual OUL00298 V2.3 EN 12 Valmet Mircowave Consistency Transmitter