Watlow Series 922 - Manual (Page 29)

How to Install and Wire, Chapter 4 29 WATLOW Series 922 User's Manual
Retransmit Common
Retransmit Output
Chart
Recorder
(Optional)
-
+
S3
S2
S1
S1
1
3
2
4
5
6
Wire Input
NOTE: For a two-
wire RTD -
Channel 2:
Use Terminals 3 and
4 for RTD, and
jumper Terminal 5
to Terminal 4.
Channel 1:
Use Terminals 6
and 7 for RTD, and
jumper Terminal 8
to Terminal 7.
Figure 17 -
Input Option "1",
Dual RTD, Wiring
Diagram.
S2
S3
Channel 2
Channel 1 7
8
Input Option "1" or "6", Terminals 1 - 8
WARNING: To avoid
electric shock, make
all connections on
the back of this
control before
connecting power to
the control. Also
disconnect power
before opening the
Series 922. Do not
apply load power to
the output circuits
until you have
entered a system set
point.
How to Wire the Series 922
This section has all the information you need to complete a good wiring job on
the Series 922 and your system. Please read the Safety Information in the
narrow column on the outside of each page. You will find internal circuits on the
left in the following diagrams, and external circuits on the right. In addition,
input and output options are listed by model number. Refer to the unit sticker
on your control to be sure that you are wiring from the corresponding diagram.
We suggest that you read through the entire section before beginning your
hookup. Then proceed, starting with the sensor inputs, auxiliary outputs, then
control outputs, data communications, and finally, power wiring.
It is very important to enter a system set point in the Series 922 before applying
power to the load circuitry.
• In all wiring diagrams, internal circuits are on the left and external
circuits are on the right.
NOTE: Input impedance
must be 10K or greater.
RTD