Series 550LX-504-4V2-10 SmartPack User's Manual Quad VDC Input
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"G" Rail (32mm), Type EN50035: To attach a module to this
style of DIN rail, angle the unit so that the upper groove of the
adapter hooks under the top lip of the rail. Firmly push the
unit towards the rail until it snaps solidly into place. To
remove a module, pull the lower part of the unit outward until
it releases from the rail, lift unit from rail.
Electrical Connections:
The wire size used to connect the unit to the control system
is not critical. All terminal strips can accommodate wire from 14-
26 AWG. Strip back wire insulation 1/4-inch on each lead before
installing into the terminal block. Input wiring may be shielded or
unshielded twisted pair. Network wires should be twisted pair.
Since common mode voltages can exist on signal wiring,
adequate wire insulation should be used and proper wiring
practices followed. It is recommended that network and power
wiring be separated from the signal wiring for safety, as well as
for low noise pickup.
1. Power: Connect power per Connection Drawing 4501-509.
These modules operate from DC power supplies only. Power
supply voltage is not critical and normally should be from
10.0V to 36V DC. The supply voltage must not exceed 36
Volts, even momentarily. Variations in power supply voltage,
above the minimum required have negligible effect on module
accuracy. This device includes reverse polarity protection.
Refer to "POWER" in the preceding SPECIFICATIONS
section for current requirements.
2. Network: Connect network per Connection Drawing 4501-
509. Note: Network circuit is isolated from input and power
circuits. See NETWORK specifications for the maximum
number of nodes per network segment.
3. Grounding: The module housing is plastic and does not
require an earth ground connection.
4. Input: Connect input per connection diagram and observe
proper polarity (see label for input type). If unit is factory
calibrated, the calibration label indicates range of input.
NOTE: All inputs share a common, however, as a group they
are electrically isolated from the network and power circuits,
allowing the input to operate up to 250V AC, or 354V DC off
ground, on a continuous basis.
NETWORK VARIABLES:
To provide interoperability, standard network variable types
are used for all external interface and configuration variables.
Figure 2 illustrates the 550L's network variable types.
Figure 2: Series 550LX1-504-4V2-10 SNVT Diagram
nvo_pvout[ 4 ]
SNVT_lev_percent
External
Interface Section
nci_pvdb[ 4 ]
SNVT_lev_percent
nci_pvtime[ 5 ]
SNVT_elapsed_tm
nci_callo[ 4 ]
SNVT_lev_percent
nci_calhi[ 4 ]
SNVT_lev_percent
Configuration Section
HARDWARE INPUT
Input 1 2 3 4 (VDC)
All network variables are 4-element arrays. Analog input 1's
network variables are referenced using an array subscript of 0;
analog input 2's by a subscript of 1, and so on. Figure 3
illustrates the relationship between input voltage and
SNVT_lev_percent value for the factory calibration case. Figure
4 provides the general output graph & equation that relates output
in terms of calibration constants.
Network variables within the External Interface Section are
intended to be bound, polled, or written by other nodes on the
network. These variables are maintained in RAM. Network
variables within the Configuration Section are intended to be
accessed by a network management tool to configure and
calibrate the module. These variables are maintained in
EEPROM and are limited to 10000 write cycles. In addition,
values written into configuration network variables do not take
effect until the module is reset. Reset can occur as the result of
powering-up, toggling the RESET switch, or issuing a "reset"
network management command to the module.
