Bronkhorst®
Instruction Manual EL-FLOW® Prestige
9.17.084N
49
4.3
Special features
4.3.1
Customized I/O options (pin 5)
EL-FLOW® Prestige
instruments offer several customized input/output functions through the 9-pin D-sub side connector as
an option. I/O options are factory installed as specified at ordering time, and cannot be changed manually.
The last three characters of the model key on the serial number label indicate the installed I/O configuration (see section
). The possible configurations are described in the table below. See the hook-up diagram for custom bus and I/O
configurations (document 9.16.118) for an explanation of the codes.
Code
Description
000
Disabled, pin 5 is pulled down to 0 Vdc (default selection)
A1V
0…10 Vdc sourcing output, controller
Analog signal for pump or external valve steering (control signal only).
When the controller output is used for pump or external valve steering (only applicable to mass flow
meters with the controller function enabled), make sure to set parameter
Valve maximum
to 0.3 [A]. For mass
flow controllers, the controller output signal represents the valve actuator current. This output is limited to
a value below 10 Vdc, due to the maximum valve current restriction.
B1V
4…20 mA sourcing output, controller
Analog signal for pump or external valve steering (control signal only).
When the controller output is used for pump or external valve steering (only applicable to mass flow
meters with the controller function enabled), make sure to set parameter
Valve maximum
to 0.3 [A]. For mass
flow controllers, the controller output signal represents the valve actuator current. This output is limited to
a value below 20 mA, due to the maximum valve current restriction.
B2V
3.8…20.8 mA sourcing output, controller
Analog signal for Badger Meter valve with TEIP11 signal converter (control signal only)
C3A
Digital output, min/max alarm
During a min/max alarm, pin 5 is pulled down to 0 Vdc.
C4A
Digital output, counter alarm
During a counter alarm, pin 5 is pulled down to 0 Vdc.
C5S
Example for C5S or C0I hook-up
Digital output, enabled by setpoint (for shut-off control)
Pin 5 is pulled down to 0 Vdc at a controller setpoint, e.g. for shut-off
valve activation.
For factory selected analog control (…-A#-C5S):
If parameter
Control mode
is set for analog control by factory, the
minimum setpoint at which the device (shut-off valve) connected to pin 5
is activated is 1.9%. This prevents possible noise on the analog input
activating the device accidentally.
For factory selected digital control (…-D#-C5S):
If parameter
Control mode
is set for digital control by factory, the setpoint threshold for activating the
device connected to pin 5 is any value > 0.
Note: If the instrument is forced into Valve Safe State, the digital output is not affected, so a (n/c) shut-off
valve connected to pin 5 will not close when the (n/c) controller is in Valve Safe State’
Make sure to use 24 Vdc power supply corresponding to the shut-off valve specifications. Cable 7.03.572 (T-
part 9-pin D-sub/loose end) or 7.03.603 (T-part 9-pin D-sub/DIN43650C) can be used for this operating
option.
