Instruction manual

1312
Output Type Description
B 5A/3A (120/240 Vac) relay, normally
open, used for switching resistive loads. If
relays or solenoids are to be driven, select
the “T” output.
E 0-20 mA
F 4-20 mA, full output to load with 500 ohm
impedance max. (suppressed).
S 20 Vdc pulsed output for solid-state relays.
T 1 A @ 120/240 Vac , solid-state relay, zero
voltage-switched and optically isolated from
drive signal. Only resistive loads to 1A
may be controlled directly. Larger loads
may be controlled using an external
contactor.
O p e r a t i o n
Athena Series 18/19/25 Universal Controller
The Series 18/19/25 controller is an autotuning PID controller,
which can function as either a temperature or linear process
controller. (See pages 62-65 for specifications and ordering
code).
Just a few steps are required before the instrument can be
placed into service. After completing the mounting and wiring
procedures as previously instructed, set your individual
process parameter values by stepping through the setup
menus, using the simple front-panel keys as instructed. Then,
initiate the autotuning sequence as shown (or tune manually).
Notes on Outputs
When you ordered your controller, a specific output type was
specified, designated as either “B”, “E”, “F”, “S”, or “T” . You
also had the option of configuring your controller with either
one or two output actions. Generally, output 1 is a heat
(reverse-acting) function and output 2 is a cool (direct-acting)
function. For best results, follow the recommendations for
setting cycle times for the output type supplied with your
controller (see page 26). A brief description of output
types follows:
Throughout this
manual, instructions
that pertain solely to
the process con-
troller, as opposed
to the temperature
controller, are shown
in blue.