Honeywell Enraf Calibron Small Volume Prover; Serial Communication - ABB SpiritIT Flow-X Instruction Manual

S P I R I T
MTL Barrier
7755ac
Pt100
MTL Barrier
7755ac
Figure 6-25 PT-100 with barrier
The above figure shows a 4-wire PRT-application with 2 MTL
7755ac barriers.
Analog outputs
When connected to a device that resides in a hazardous
area, safety barriers or galvanic isolators may be
required to be interposed between the device and the Spirit
Flow-X flow computer. Below paragraph contains application
examples with barriers. Always refer to the device
documentation for adequate information.
The 4-20 mA analog output circuits are floating in relation to the
other type of I/O, with a single common ground shared between
the analog outputs of the same flow module.
Each analog output can drive a load up to 650 Ohm.
Load
(650 Ohm
max.)
Figure 6-26 Analog output
Below figure shows a 4-20 mA control in a hazardous area,
separated from the safe area by an MTL barrier type 7728+.
+
MTL Barrier
4-20 mA
7728+
control
-
Figure 6-27 Analog 4-20 mA control with barrier
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
PRT power +
[1..2]
PRT power -
[1..2]
PRT signal +
[1..2]
PRT signal -
[1..2]
Analog output
[1..4]
Analog output
common
Analog output
[1..4]
4-20 mA
Analog output
common
Honeywell Enraf Calibron small volume
prover
The following diagram applies for the connection of the Spirit
Flow-X to the 401D board of a Honeywell Enraf Calibron small
volume prover.
IT
Figure 6-28 : Connection diagram for Honeywell Enraf Calibron
prover
IT
Note: on the Spirit
used for the Prover Run Command digital output must be set to
'Inverted' (refer to display 'IO\Module <x>\Configuration\Digital
IO settings')

Serial communication

Each Flow-X/M flow module provides 2 serial ports. Furthermore
the Flow-X/P provides an additional 3 serial ports and the Flow-
X/C one (COM3). Each serial port is capable of either RS-232 or
RS-485 communications, with the exception of COM1 of the
version 1 Flow-X/P, COM3 of the version 2 Flow-X/P or COM3 of
the Flow-X/C, which are RS-232 only.
For RS-232 communications 3 terminals are used: Tx, Rx and 0 V.
Hardware Flow control is not supported (except for COM1 of the
Flow-X/P display module which does support flow control).
Rx
Tx
Gnd
External
Figure 6-29 RS-232 connection
For RS-485 communications both half-duplex (2-wire) and full-
duplex (4-wire) modes are supported.
Flow-X the polarity of the digital channel
Tx
Rx
0V
Flow-X
2 7
IT