1834-SUP-PWR Supplemental Power Tap

Power Consumption

The 1834-SUP-PWR supplemental power tap introduces a new Switched Power (SP) source at the point of media insertion, and 100-E/104-E contactor communication interface modules connected downstream of the OUT media port draw from this SP capacity until the cable is terminated with a 1486-CON-T1 end node connector.
SP output ratings are identical to the 1834-AENTR Gateway. SP is rated up to 4 A continuous, with 8 A for up to 5 seconds. The boost capacity supports the inrush current that is required for energizing the 100-E/104-E contactor coils.
Output Channel
Requirement
Network Power (NP)
Network power passes through from the Gateway.
Switched Power (SP)
Required for each 100-E and 104-E
EtherNet/IP™
 In-cabinet communication interface that is connected within a flat media system. SP is used to energize the 100-E and 104-E electronic coils.

Calculating the Switched Power Ampacity

When motor starters are used on a flat media network, their load must be included in the power tap’s total 24V DC input power calculation. With a properly rated 10 A power supply, the supplemental power tap can provide an 8 A short-duration boost for switched power (SP).
IMPORTANT:
You must provide 96 W of hold-in energy and 196 W of peak supply to accommodate coil in-rush energy when energizing contactor coils.
Consider the following factors when adding 100-E and/or 104-E AC contactors to your system:
  • The number of contactors that are connected to each system
  • The coil type of each
  • How many starters are simultaneously started
Our Rockwell Automation family of 100-E and 104-E AC contactors offer multiple coil types. The EJ and QJ coils are low consumption and provide lower coil “in-rush” and coil “hold-in” ratings.
TIP:
For a complete list of coil ratings, see the IEC Contactor Specifications Technical Data, publication 100-TD013.
Example: Evaluation Method for SP Calculation
To determine the total demand requirement for SP, follow the instructions in the example below.
Example Calculation: Contactor Energy Consumption
Cat. No. Contactor Range
Coil Rating
Energy Consumption in Watts (W) by Consumption per Contactor
KJ (Standard)
EJ (Low)
QJ (Low, Fast Dropout)
100-E09…100-E38
Hold-in energy
2.2
1.7
1.7
In-rush energy
50
16
6
100-E40…100-E65
Hold-in energy
2
—
—
In-rush energy
25
—
—
100-E80…100-E96
Hold-in energy
2
—
—
In-rush energy
40
—
—
  1. Use the formulas below to calculate the total SP required and total in-rush required.
    Calculation
    (Number of contactors x Hold-in energy) = Total SP required
    (Number of contactors x In-rush energy) = Total In-rush required
    IMPORTANT:
    The in-rush value can be derated if the motors are not started simultaneously .
  2. Use the calculated total values to validate the sizing of the DC power supply that is connected to the device.
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