Endress+Hauser gammapilot FTG 671, Operating Instructions Manual

Page: 9 / 64

1.2 Measuring system
A working system for limit level detection comprises:
•
Gammapilot FTG 671 transmitter,
•
QG 020 or QG 100 source container with Co 60 or Cs 137 gamma source
•
DG 17 or DG 27 Geiger-Müller counter or
DG 57 scintillation counter.
The Gammapilot may operate as a stand-alone or system unit. Two relays act as freely
programmable limit switches which can be operated in fail-safe or acknowledgement
mode. An alarm relay monitors the correct functioning of the measurement point and
trips on fault condition.
If controlled remotely with other Commutec transmitters within a process control system,
the Gammapilot is addressed via the Rackbus. In this case, communication is controlled
by a ZA 67
…
Gateway which converts Rackbus data into the appropriate network
protocol. The Gammapilot can be remotely configured, its measured data and status
scanned and its settings up and downloaded through the Gateway.
BA082E41
Detector and source container
in hazardous area
FTG 671 in safe
area
Fig. 1.3:
Gammapilots FTG 671 row
mounted in Monorack II
housings
BA082E04
Commutec transmitters
Rackbus
Personal
computer or
PC system
Programmable logic
controller with Modbus port
Sensors Actuators
RS-232C interface
Modbus interface
ZA 370
or
ZA 371
ZA 672
Fig. 1.4:
The Gammapilot FTG 671 can
be used as part of a process
control system.
Here it is shown with other
Commutec transmitters and the
ZA 672 Modbus Gateway
Gammapilot FTG 671 Chapter 1: Introduction
7