User`s manual

16
WATLOW DIN-A-MITE Style C User's Manual
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∫
1
WARNING:
Use National Electric
(NEC) or other country-
specific standard wiring
practices to install and
operate the DIN-A-MITE.
Failure to do so may
result in damage to
equipment and property,
and/or injury or loss of
life.
∫
2
WARNING:
Wiring examples show L2
in phase-to-phase, 200
VÅ (ac) and above
configuration. In phase-to-
neutral, 100 VÅ (ac) and
above applications, L2 is
neutral and must not be
fused or switched. Failure
to follow this guideline
could result in personal
injury or death.
∫
3
WARNING:
Only authorized and
qualified personnel should
be allowed to install and
perform preventive and
corrective maintenance on
this unit. Failure to follow
this guideline could result
in damage to equipment,
and personal injury or
death.
NOTE: If you plan to wire
multiple DIN-A-MITE
alarm outputs, you need to
include an intermediate
relay for each DIN-A-MITE
used.
System Wiring Example
Alternative Latching Alarm Circuit
If there is a need for a latching alarm in the case of an open heater or
shorted SCR, the DIN-A-MITE alarm circuit could be used as shown in the
latching alarm example at right. If the DIN-A-MITE triac alarm output
energizes, it will energize the RY1 (external alarm relay) mechanical relay
coil. Once the RY1 coil is energized it will latch on (via the RY1A normally
open contact) until the power to the relay is removed. You could cycle the
power via a reset switch. The RY1B contact set can be used for alarm
signaling.
Breaker
11 12
+
–
9
10
3
5
Thermocouple
Controller
120 V~
(ac)
Series
93
CR1
LP1
Alarm
Over-
Temperature
Coil
AC Common
Reset
High Limit
Thermocouple
AC High
High Limit
Series 146
1
3
9 Normally closed
7 Normally open
5
13 14 10
11
93BB-1FA0-00RR
L3
480 VÅ
(ac)
L2
L1
480 V~ (ac)
+
–
–
+
CR1 = High-Limit Contactor
146E-1601-3000