KROHNE GFM 700 EN - Manual (Page 8)

8
4.3 GFC 700 Signal converter
Versions
Integral systems (K)
GFC 700 K signal converter mounted on primary head
Remote systems (F) GFC 700 F signal converter with wall mount (rotating design) and
additional terminal box
Option MP signal converter equipped with magnet sensors, to set the signal
converter by means of hand held bar magnet without opening the
housing
Power supply 1. AC Version AC / DC Version
Standard Option
1. Rated voltage 115 / 230 V 24 V AC 24 V DC
Tolerance band +/- 13 % 20 – 27 V AC 18 – 32 V DC
Frequency 48 – 63 Hz 48 – 63 Hz –
Power consumption Max. 13 VA approx. 10 VA approx. 8 W
(incl. primary head) When connected to functional extra-low voltage (24 V) safety separation (PELV) is essential
to VDE 0100 / VDE 0106 and IEC 364 / IEC 536 or equivalent national standards.
Analog Output
• continuous flowrate measurement or measurement of sound velocity
to determine (composition of) liquid product
• all operating data configurable
• galvanically isolated
• for active and passive mode Function
• useable as internal power supply for the binary outputs
Current for Q = 0%: 0 – 16 mA
for Q = 100%: 4 – 20 mA
settings in 1 mA increments
(I
max
= 22 mA)
Active mode load max. 680 Ohm
Passive mode external voltage ≤ 18 V DC
load ≤ 680 Ohm
Low-flow cutoff cutoff “on” value 1 – 19%
cutoff “off” value 2 – 20%
of Q
100%
,
setting in 1% increments
Time constant 0.04 – 3600 s, setting in increments of 1, 0.1 or 0.01 s
Forward / reverse measurement direction identified via status output (or pulse output)
Internal power supply for binary outputs U
int
= 19 – 32 V DC / I ≤ 50 mA
Pulse output
Function
– continuous flow counting or measurement of sound velocity
to determine (composition of) liquid product
– all operating data configurable
– galvanically isolated
– active and passive mode
Pulse rate for Q = 100% 10 – 3600000 pulses/h
0,167 – 60000 pulses/min
0.0028 – 1000 pulses/s (= Hz)
optionally in pulse per liter, m 3 ,
US gallons or user-defined unit
Pulse width automatic: pulse duty cycle 1:1, max. 1000 Pulse/s = max. 1000 Hz
variable: 30, 50, 100, 200, 500 ms, ≤ 10 Pulse/s ≤ 10 Hz
Active mode connection: electronic totalizer
internal voltage: 19 – 32 V DC, from current output
load current:
I
max
< 50 mA, operation with status
output
Passive mode connection: electronic or electromechanical totalizer
external voltage: U
ext
≤ 32 V DC / ≤ 24 V AC
load current: I
max
≤ 150 mA
Low-flow cutoff cutoff “on” value: 1 – 19%
cutoff “off” value: 2 – 20%
of
Q100%
, setting in 1% increments
Time constant 0.04 – 3600 s, setting in increments of 1, 0.1 or 0.01 s
Forward / reverse measurement
direction identified via status output or current output (status output only
available in non-EEx version)