Connection Diagrams - ABB SpiritIT Flow-X Instruction Manual

2 2 S P I R I T
DIO Relays
Each DIO has the option to split the field and flow computer
signals using a relay.
Only mount 1 relay maximum for each DIOx channel, depending
on signal-direction (see text and arrows on PCB, in front of each
relay-socket).
The EXT_SIG and EXT_RET signals are connected to the coil of a
relay if the DIO is used as Digital Input. The _SIG and _RET
signals indicate the logical current flow.
The EXT_SIG and EXT_RET signals are connected to a relay
contact in case the DIO is used as Digital Output. In this case the
polarity of _DIG and _RET is not important.
The input relay and kickback diodes are protected against
polarity swap up to 1000 VDC.
The relays can be replaced easily. They are 5 mm pitch SPNO or
SPST (in which case the NS-contact is unconnected). Metal clip is
meant for 26mm high relays. In case output- is used, relay coil
must be rated 24VDC. Kickback-diodes for both input- and
output-relay are present on PCB and always enabled.
Wrong mounting of the relay or wrong configuration of the DIO
does not damage the Flow-X DIO.
Preferable use a single relay and switch configuration between
input or output (ext signals connected to coil for Digital Input or
relay contact for Digital Output)
Direct connections
Each Flow-X/M DIO can be directly connected using the DIG_SIG
connection in combination with the 24_V_OUT and/or DIG_GND.
These connections are not protected individually.
A pull-up resistor in combination with a green LED can be
enabled or disabled with a jumper.
I T F L O W - X I N S T R U C T I O N M A N U A L | I M / F L O W X - E N

Connection diagrams

Ground wiring
IT
The Spirit Flow-X flow computer uses the following separate
ground connections:
 one common ground for the power supply and the digital
signals ('0 V')
 one isolated common ground for the analog inputs ('Analog
input common')
 one isolated common ground for the analog outputs ('Analog
output common')
 chassis ground (through the chassis grounding screw)
+
-
+
-
0V
(external)
IT
Figure 6-6 Spirit Flow-X power supply wiring
The separate common ground for analog inputs and analog
outputs accommodate for applications with isolated (floating)
analog signals.
One of several
Analog input
common
connections
Isolated analog
input common
Figure 6-7 Isolated analog signal ground
If no isolated analog signal ground is available, then the analog
input and/or output common ground must be connected to the
common ground (0 V).
One of several
Analog input
common
connections
One of several
0V connections
Figure 6-8 Common analog signal ground
Fuses
Each digital I/O channel is protected for over-voltage and over-
current by a polyfuse that resets automatically a few seconds
after the fault situation has cleared.
The 24 VDC power supply is protected by a polyfuse as well,
which is rated Imax 2.2 Ampere and Vmax 30 Vdc.
24V Primary
0V
24V Secondary
0V
8-pin Power supply
terminal block
One of several
Analog output
common
connections
Isolated analog
output common
One of several
Analog output
common
connections
One of several
0V connections