Quick Start Guide

Quick Start Guide
D103214X012
DLC3010 Digital Level Controller
September 2014
13
1. For mounting a digital level controller on a 249 sensor, secure the shaft extension to the sensor torque tube shaft
via the shaft coupling and set screws, with the coupling centered as shown in figure 7.
2. Slide the access handle to the locked position to expose the access hole. Press on the back of the handle as shown in
figure 2 then slide the handle toward the front of the unit. Be sure the locking handle drops into the detent.
3. Remove the hex nuts from the mounting studs.
4. Position the insulator on the digital level controller, sliding the insulator straight over the mounting studs.
5. Re‐install the four hex nuts on the mounting studs and tighten the nuts.
6. Carefully slide the digital level controller with the attached insulator over the shaft coupling so that the access hole
is on the bottom of the digital level controller.
7. Secure the digital level controller and insulator to the torque tube arm with four cap screws.
8. Tighten the cap screws to 10 NSm (88.5 lbfSin).
Electrical Connections
WARNING
Select wiring and/or cable glands that are rated for the environment of use (such as hazardous area, ingress protection and
temperature). Failure to use properly rated wiring and/or cable glands can result in personal injury or property damage
from fire or explosion.
Wiring connections must be in accordance with local, regional, and national codes for any given hazardous area approval.
Failure to follow the local, regional, and national codes could result in personal injury or property damage from fire or
explosion.
Proper electrical installation is necessary to prevent errors due to electrical noise. A resistance between 230 and 1100
ohms must be present in the loop for communication with a Field Communicator. Refer to figure 9 for current loop
connections.
Power Supply
To communicate with the digital level controller, you need a 17.75 volt DC minimum power supply. The power
supplied to the transmitter terminals is determined by the available supply voltage minus the product of the total loop
resistance and the loop current. The available supply voltage should not drop below the lift‐off voltage. (The lift‐off
voltage is the minimum “available supply voltage” required for a given total loop resistance). Refer to figure 10 to
determine the required lift‐off voltage. If you know your total loop resistance you can determine the lift‐off voltage. If
you know the available supply voltage, you can determine the maximum allowable loop resistance.
If the power supply voltage drops below the lift‐off voltage while the transmitter is being configured, the transmitter
may output incorrect information.
The DC power supply should provide power with less than 2% ripple. The total resistance load is the sum of the
resistance of the signal leads and the load resistance of any controller, indicator, or related pieces of equipment in the
loop. Note that the resistance of intrinsic safety barriers, if used, must be included.