Instruction Manual
D200129X012
2506/2516 Receiver/Controller
June 2017
13
or hazardous gas. The case and cover assembly does not form a gas‐tight seal and flammable or hazardous gas could leak
from this unit. Therefore, if the receiver/controller unit is enclosed, install a remote vent line to remove part of the exhaust
gas to a properly ventilated area. However, a remote vent line cannot be relied upon to remove all hazardous gas. Vent line
piping should comply with local and regional codes and should be as short as possible. Select vent line piping with
adequate inside diameter and install with few bends to reduce case pressure buildup.
See figure 3 for vent locations.
A receiver/controller may be ordered with one of two vent configurations:
D Standard, with 1/4‐inch case vent open. The standard receiver/controller case (key 1) is not drilled and tapped for
the optional tapped vent.
D Optional, with tapped vent, for applications requiring vent line attachment to receiver/controller case. The optional
receiver/controller case features a tapped vent for applications requiring a remote vent line. The standard case vent
should be sealed with a machine screw.
An air vent plug (key 137) with gasket (key 138) and hex nut (key 139) can be added to the tapped vent. The air vent
plug provides a 1/4 NPT internal fitting.
D Receiver/controllers feature an open bellows vent/remote set point connection. An external vent assembly (key
128) is recommended if the remote set point connection is not made. The external vent assembly can be driven
into the open bellows vent.
Protect all vents against the entrance of any foreign material that could plug them. Check the vents periodically to be
certain they are not plugged.
Remote Set Point Connection
WARNING
Severe personal injury or property damage may occur if the instrument air supply is not clean, dry and oil free or
non‐corrosive gas. While use and regular maintenance of a filter that remove particles larger than 40 micrometers in
diameter will suffice in most applications, check with an Emerson Automation Solutions field office and industry
instrument air quality standards for use with corrosive gas or if you are unsure about the proper amount or method of air
filtration or filter maintenance.
See figure 3.
The remote set point connection is made at the tapped bellows vent/remote set point connection on the rear of the
receiver/controller case. A vent assembly (key 128) is recommended if the remote set point connection is not made.
To make a remote set point connection, remove the vent assembly from the connection. Install piping from the
remote set point loader or regulator.
When a panel loader or regulator is used for remote set point adjustment, as shown in figure 11, an adjustable output
range of 0.2 to 1 bar (3 to 15 psig) or 0.4 to 2 bar (6 to 30) is required to match the receiver/controller output range.
Use clean, dry air or a non‐corrosive gas for supply pressure to the remote set point bellows.
Startup
It is important that the output range of the transmitter or other device used as the input to the receiver/controller be
adjusted so that its output range corresponds to the input signal range of the receiver/controller. Be sure the
receiver/controller action (direct or reverse) is correct for the application.
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