Watlow Series 94 - Manual (Page 9)

Wiring the Series 94
The Series 94 wiring is illustrated by model number option. Check the unit
sticker on the controller and compare your model number to those shown here
and also the model number breakdown in the Appendix of this manual.
All outputs are referenced to a de-energized state. The final wiring figure is a
typical system example.
When you apply power without sensor inputs on the terminal strip, the Series
94 displays
[`---] in the upper display, and [`Er7] in the lower display after
30 seconds on power-up. This error indicates an open sensor or A/D error. All
wiring and fusing must conform to the National Electric Code and to any locally
applicable codes as well.
Power Wiring
High Voltage
100 to 240Å (ac), nominal (85 to 264 actual) 94_ _-1_ _ 0 - 00_ _
Low Voltage
12-24V‡ (ac/dc) 94_ _- 1_ _ 1 - 00_ _
Figure 2.3 – Power wiring.
L1 L2
11 12
LIMIT 94
RESET
W a t l o w S e r i e s 9 4 I n s t a l l a n d W i r e ■ 2 . 3
Install and Wire
Ó
WARNING: To avoid
electric shock, use
National Electric
Code (NEC) safety
practices when
wiring and connect-
ing this unit to a
power source and to
electrical sensors or
peripheral devices.
Failure to do so could
result in injury or
death.
NOTE:
Taking the unit out of
the case is not a nor-
mal operating condi-
tion and should only
be done by a quali-
fied maintenance
installation techni-
cian. Power to the
case should be dis-
connected before
removing or
installing the con-
troller into its case.
Ó
WARNING: The case
terminals may still
carry live voltage
when the unit is
removed.
Ó
WARNING:
Irreversible damage
will occur if high
voltage is applied to
the low voltage unit.
NOTE: Optional protective rear terminal
cover, 0822-0426-P001, is available.
Contact Watlow customer service or your
local Watlow sales representative.