Bronkhorst®
Instruction Manual ES-FLOW™
9.17.145E
10
1.5.1
Customized I/O options
ES-FLOW™
instruments offer various customized input/output functions through pin 5 of the M12 connector and through
pin 2 of the M8 connector as an option. I/O options are factory installed as specified at ordering time, and cannot be
changed manually.
The last 3 groups of the model key on the serial number label indicate the installed I/O configuration. The possible
configurations are described in the table below. See the hook-up diagram for custom bus and I/O configurations
(document 9.16.196) 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 (mass flow meters only), make sure
to set parameter
Valve maximum
to 0.3 [A]. For mass flow controllers, the controller output is limited to a
value below 10Vdc, 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 (mass flow meters only), make sure
to set parameter
Valve maximum
to 0.3 [A]. For mass flow controllers, the controller 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
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.
C0I
Digital output, high/low switch via remote parameter (e.g. for shut-off valve control)
Pin 5 is pulled down to 0 Vdc when writing value 1 to parameter
IO switch status
, this is undone by writing
value 0.
A device connected to pin5 (e.g. a shut-off valve) can be activated/deactivated by writing parameter
IO
switch status
.
Note: If the instrument is forced into Valve Safe State, the digital output is also affected, so a (n.c.) shut-off
valve connected to pin 5 will be closed 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.