ACI-Automation Components A/TT-RSO Instruction Sheet

Installation and Operation Instructions
PRODUCT APPLICATION
The A/TT-RSO is a temperature transmitter product family intended for room applications. Optional features, if selected, provide useful features often desired in room applications, including setpoint and override outputs. Both the temperature transmitter and the setpoint transmitter functions support 4-20mA, 1VDC to 5VDC, and 2VDC to 10VDC output options. The setpoint function also supports resistance output options, with or without an offset resistance. The override function provides a normally open dry-contact switch output for occupancy indication.
This instruction covers the following A/TT-RSO family products: A/TT-R, A/TT-RS, A/TT-RSO and A/TT-RO.
CAUTION—ELECTRICAL HAZZARD: Can cause electrical shock or equipment damage. Be sure to make all connections with the power source turned off.
CAUTION—Do not mount product in refrigerated areas, and do not allow condensation to form on product.
INSTALLATION INSTRUCTIONS
A/TT-RSO
Mounting:
Install the A/TT-RSO in a room location approximately 5 feet (1.5m) above the floor, preferably on an interior wall in an area with good air circulation and average temperature. Do not mount in areas with drafts or dead spots, in areas affected by hot or cold air ducts, or in areas with direct sunlight or other radiant heat sources.
Remove the cover from the base; if needed turn the (2) 1/16” Allen Screws located at the bottom of the base clockwise in order to remove the cover from the base. Pull wires through the wire access area in the base located near the terminal blocks. Mount the base to the wall, using the (2) 6/32” x 1” screws provided. Replace the cover and tighten down, using the (2) 1/16” Allen screws located on the bottom of the base.
Power Source:
8.5VDC to 32VDC (AC voltage is not supported). Temperature transmitter function: 25mA maximum. Setpoint transmitter function: 25mA maximum if current or voltage output is selected.
Notes:
1. If the A/TT-RSO is selected with both the temperature and the setpoint transmitter features, 50mA is required from a single power source.
2. The A/TT-RSO temperature transmitter function and setpoint transmitter function can be operated with two power sources to allow for separate 4-20mA current loops.
3. If the A/TT-RSO is selected with the resistance setpoint feature, the setpoint resistance supports a maximum of 0.25 Watt power dissipation capability.
Wiring: (All wiring must comply with applicable local electrical codes and ordinances.)
The use of 18 to 22 AWG shielded cable is recommended for all wiring applications. Terminate the shield at the controller-end.
A minimum of 2 and a maximum of 7 wires are required to operate the A/TT-RSO, depending on the features selected. The A/TT-RSO has terminal blocks installed to support the selected features. Loosen the appropriate screw terminals. Insert the wires into the terminal block, and then re-tighten the screws. Place the cover back onto the base and turn the setscrews counter-clockwise to hold the cover.
Version : 5.0
I0000258
Page 1 of 4
Wiring Diagrams:
Typical 2-wire 4-20mA Current Loop Transmitter Connections:
Figure 1: A/TT-R (Current Output) Figure 2: A/TT-RS (Current Output)
Temperature: 4-20mA
DC Power Source
Terminal Block(s) Terminal Block(s)
Controller
Temperature: 4-20mA Setpoint: 4-20mA
DC Power Source
Controller
Figure 3: A/TT-RSO (Current Output) Figure 4: A/TT-RO (Current Output)
Temperature: 4-20mA Setpoint: 4-20mA Normally Open Dry-Contact Override
DC Power Source
Terminal Block(s) Terminal Block(s)
Temperature: 4-20mA Normally Open Dry-Contact Override
DC Power Source
= Not Loaded= Not Loaded
Controller
= Not Loaded= Not Loaded
Controller
Version : 5.0
I0000258
Page 2 of 4
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