Rockwell-automation 1746-NI16V SLC 500 Analog Input Modules User Manua Bedienungsanleitung PDF herunterladen (Seite 27)

Publication 1746-UM001A-US-P

Installation and Wiring 3-5

Fixed Chassis Example

The following example shows how to use the chart and table on

page 3-4 to determine if the module combination of an 1746-IN16 and

1746-NI16 is supported by the fixed I/O chassis.

1. Find the current draws of both modules in the table.

IN16 = 85 mA at 5V dc and 0 mA at 24V dc

NI16 = 125 mA at 5V dc and 75 mA at 24V dc

2. Add the current draws of both modules at 5V dc.

85 mA + 125 mA = 210 mA

3. Plot this point on the chart above (210 mA at 5V dc).

4. Add the current draws of both modules at 24V dc.

0 mA + 75 mA = 75 mA

5. Plot this point on the chart above (75 mA at 24V dc).

The resulting point of intersection is marked with an “x” on the chart

above, showing that this combination falls within the operating region

of the fixed I/O chassis.

IMPORTANT

When using the table, be aware that there are certain

conditions that affect the compatibility characteristics of

the BASIC module (BAS) and the DH-485/RS-232C

module (KE).

When you use the BAS module or the KE module to

supply power to a 1747-AIC Link Coupler, the Link

Coupler draws its power through the module. The

higher current drawn by the AIC at 24V dc is

calculated and recorded in the table for the modules

identified as BASn (BAS networked) or KEn (KE

networked). Make sure to refer to these modules if

your application uses the BAS or KE module in this

way.

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Rockwell-automation 1746-NI16V SLC 500 Analog Input Modules User Manua Bedienungsanleitung Seite 27