3.5.3.1 Air Bath or Airless AC Input and Fuses
In Air Bath or Airless models, AC mains power is wired to TB1 and TB2. TB10 is an optional
connection for an uninterruptable power supply for the 24 V power supply output, as shown in
the diagram below. This allows the electronics to be conveniently powered by a separate circuit
from the heaters. Each secondary power source must have its own circuit breaker, certified for
use in the target environment. See the Application Drawing Package for details.
Note
The power switching circuit is designed for either 115 VAC or 230 VAC. For safety reasons, the
PECM is not designed to convert DC to AC. Attempted operation from a DC source will damage
or destroy the PECM. To generate and control 115 VAC from a DC voltage system, the
customer must use components external to the PECM.
*TB10 parallel-connected
to TB1 if UPS is not used
H
ot
F5 6A
H N
TB10*
TB9
Low Wattage
Heater Relays 1- 5
1
2
3
1
4
Air Bath Heater Power
Hot
Holder
Hot
AC Chassis
Ground
F1
16A
ABH2
F2
16A
ABH1
Medium Wattage
Heater Relays
Hot
3
F4 10A
L 2
N 2
H N G
1
2
1
2
3A
Holder
H N G
TB1 TB2
L 1
N 1
Hot
Filtered AC
F3
J1
H
G
N
1
3
2
1
2
3
AC Filter Plug
(for 24V supply)
Holder
Figure 3-8 PECM AC Power Distribution
Installation Steps
3.5 Cable Connections
Installation Manual
22 Installation Manual, 12/2019, 2000595 Rev 1
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