Emerson FOUNDATION Fieldbus Interface Bedienungsanleitung Seite 6

Safe Use Instructions – F
Fieldbus-
compliant
wiring
DOC0780B
Figure 5. Field Wiring for Powered H1 Module
Table 1 identifies each terminal and its purpose on the
powered H1 module.
Table 1. Powered H1 Module Terminals
Termin al L abel
1 CP+
2 CP-
3
4
5
6
7
8
9 Alarm+
10 Alarm -
Use unpowered H1 modules and an external fieldbus-
approved conditioned power supply (see Figure 6) when
you are uncertain about the power draw or the number of
fieldbus devices.
DOC0779C
Figure 6. Field Wiring for Unpowered H1 Module
Table 2 identifies each terminal and its purpose on the
unpowered H1 module.
OUNDATION
FF
DEVICE
FF
DEVICE
FF
DEVICE
Definition
Conditioned
Power Positive
Conditioned
Power Negative
A Fieldbus A
A Fieldbus A
A Fieldbus A
B Fieldbus B
B Fieldbus B
B Fieldbus B
Over-current
open-collector
Ground
+
EXTERNAL
CONDITIONED
-
POWER
FF
Fieldbus-
DEVICE
compliant
wiring
FF
DEVICE
FF
DEVICE
Fieldbus Interface
Table 2. Unpowered H1 Module Terminals
Term in al
1
2
3
4
5
6
7
8
9
10
Note: The FFI supports up to four H1 modules and
you can connect up to 16 fieldbus devices to
each module. However, the actual number of
devices supported depends on the power
consumption of each device and the type of
connecting cable in use.
Disabling the Power Conditioner on an H1 PWR
Module
If you determine that the amount of power the H1
PWR module provides is insufficient for your device,
you can disable the power conditioner on the H1
module and use external conditioned power.
Note: This option is available only for an H1 PWR
module. You must disable the power
conditioner on the H1 PWR module before
wiring the module to external power.
Otherwise you can irreparably damage the
module's power conditioner.
To disable the power conditioner:
1. Remove the wire channel cover.
2. Disconnect any wiring to the terminal blocks.
3. Unscrew the two captive screws holding the
module in place.
4. Firmly grasp the plastic lip on the edge of the
module and gently pull the module from the slot.
You may need to gently wiggle the module.
5. Position the module as shown in Figure 7.
Figure 7. P12 Jumper on H1 PWR Module
Form A6296
L abel Definition
NC No Conne ctio n
NC No Conne ctio n
A Field bus A
A Field bus A
A Field bus A
B Field bus B
B Field bus B
B Field bus B
NC No Conne ctio n
NC No Conne ctio n
P12 Jumper (in
ON position)
DIP switches
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