Watlow Series 321 - Manual

Figure 1a – Series 321 Timer and mounting collar, side view.
Controls
1241 Bundy Blvd., P.O. Box 5580, Winona, MN 55987-5580
Phone: 507-454-5300, Fax: 507-452-4507
W321-XUMN Rev B Made in the U.S.A
May 1997 (1107) Printed on Recycled Paper
10% Postconsumer Waste
Series 321
Dual Output, Digital Countdown Timer
User 's Manual
Watlow's Series 321 is a dual output, digital
countdown timer with an easy-to-use control
and display panel. The display allows you to
track remaining time and process status. On-
board memory retains the most recent time
setting for easy recall, even after power is
removed. The interlock feature interrupts
timer operation immediately when it is
opened. This feature can be used as an
interlock, remote off, or emergency shut-off.
The housing and connectors are designed for
fast and reliable installation in your product.
Features
• Square 1/8-DIN size;
• Universal mounting scheme — through the
panel or flush mount;
• Standard 1/4" spade wiring terminals;
• Dual output — 6A @ 120V~ (ac) or 3A @
240V~ (ac) mechanical relays;
• Corrosion and water resistant composite case;
• Timer display options include hours:minutes
or minutes:seconds.
Dimensions
Figure 1b – Series 321 Timer inserted
in the mounting collar, side view.
Registered Company
Winona, Minnesota USA
ISO 9001 ISO 9001
2.585"
(65.7mm)
1.750"
(44.5mm)
Front Panel
Ridges
3.325"
(85.46mm)
2.85"
(72.4mm)
.750"
(19.1mm)
Tabs
2.585"
(65.7mm)
1.750"
(44.5mm)
Front Panel
Tabs
Ridges
321 Timer Mounting Collar Timer flush with Mounting Collar