Watlow Electric SERIES 1500 Chapter 1 Starting Out with the Watlow Series 1500

Starting Out
4 WATLOW Series 1500 User's Manual Starting Out, Chapter 1
Chapter 1
Starting Out with the Watlow Series 1500
"Read Me First."
Congratulations, you're about to become a fully-qualified user of the Watlow Series
1500! It is a versatile microprocessor-based control; powerful, yet simple to learn. In
this chapter of the user's manual, you'll get an overview of the 1500 and its software.
You'll "light" the displays and get a feel for moving through the control functions.
Figure 1 is a simplified view of the 1500's capabilities. The control has dual inputs,
one per channel, and dual control outputs for each channel. There is a choice of
auxiliary (event) or alarm outputs, an event input and remote hold input. An "Event
Output" in the Series 1500 is an ON/OFF solid state relay or solid state switch output
for activating periphered equipment or processes. Models with optional communica-
tions may be connected to a computer via a serial communications interface.
The Series 1500 will handle 51 separate control steps. Each step duration is variable
from one second to 24 hours, 59 minutes, 59 seconds. The 1500 is a "profiling"
control because it will control up to 51 consecutive steps with a single program; the
resulting graph of all the steps makes a program "profile." The 1500 is a "ramping"
Figure 1 -
Series 1500
Input and Output
Overview
RS-422A/RS-423A (RS-232C)
Serial Communications Interface
See Page 62
Heat/Cool
See Page 36
Humidify/
De-Humidify or
Heat/Cool
See Page 36
Dual Control
Outputs/Channel
See Pages 6 & 82
Dual Inputs
See Pages 6, 35 & 82
TEMP and %RH or
TEMP
See Pages 6, 8 & 35
Event Input
See Pages 36 & 51
Remote Hold Input
See Pages 36 & 51
8 Auxiliary (Event)
Outputs, 4/Channel
See Pages 36 & 51
or
3 Auxiliary (Event)
Outputs/Channel and 1
Alarm Output/Channel
See Pages 36, 49 & 51