5.2 SINGLE PHASE HOOK-UP
Figure 5.2 shows correct connection for single phase mains units. The single phase
version of the HPL110A requires a 24V secondary isolation transformer (supplied) with
the L2 - Neutral side of the secondary grounded.
5.3 ALARM RELAY STATES
Figure 5.3 shows the states for the alarm relay. The relay is energized when the HPL110A is
powered and is de-energized when an alarm state exists - fail safe operation. The Relay LED
on the front panel is illuminated when the Relay is energized; this Relay LED, therefore, is on
during normal operation and is switched off when an alarm occurs.
11
Power
Off
On
On
Alarm Condition
No
No
Yes
Relay LED
Off On
Off
Limit LED
Off
Off
Flashing
NC 9
COM 10
NO 11
F i g u re 5 . 3
M
1~
24V Secondary
Isolation
Transformer
L1
L2
K
Only if min. limit used
Motor
Fuses
11
10
NC
NC
NC
9
C
NO
HPL110A
12
13
PE
14
S1
15
S2
1 L1
3 L2
5 L3
7 k
8 l
GND 17
NC
18
16
F i g u re 5 . 2
Note:
The HPL110A has a single alarm relay which is tripped by both a max. and/or
a min. limit alarm.
