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Power Controllers
G3PX
Operation
■
Error Detecting Function
Wiring
Single-phase Models
All G3PX-2
@
0EH/EHN/EC-series models incorporate terminals 11
and 12 for the CT Unit, 13 and 14 for the external reset switch, and
16 and 17 for relay output as well as power/input terminals 1 through
10.
Output
Single-phase Models
The following illustrations show the condition of the G3PX LED
indicators when the G3PX detects heater open circuit, a short-mode
failure (ON failure of components), or overcurrent (EC-series
constant-current models only). The indicator and relay output signals
are reset with the internal or external reset switch provided that the
error condition has been remedied.
1. When EH/EHN/EC-series models detect single or multiple heater
open circuit, the OPEN indicator is lit and the SPDT relay output
is ON.
Note: When the G3PX detects heater open circuit, the Level indicator
will be OFF regardless of the G3PX input condition. The red
OPEN indicator will be lit. EHN-series models, however, will
continue operating with level indication.
2. When EH/EHN/EC-series models detect a short-mode failure, the
SHORT indicator is lit and the SPDT relay output is ON.
Note: When the G3PX detects a short-mode failure, all LEDs of the
Level indicator and red SHORT indicator are lit. When you use
a breaker to disconnect the load with the relay output, all LEDs
of the Level indicator will be OFF regardless of the input to the
G3PX.
3. When EC-series models detect an overcurrent, the Level
indicator will flash and the SPDT relay output is ON. The input
signal will be shut off.
Note: When resetting, leave power supply terminals 10 to 9 or 8 ON.
11
12
13
14
15
16
17
G3PX-2
@
0EH
CT Unit
G32X-CT
@@
3. For more than one heater.
Load 1
Load 2
CT Unit
Relay output
(SPDT)
Load
(see note 1)
(see note 2)
(see note 3)
External reset
switch
Note: 1. Connect either the black or white lead wire of the CT
Unit to terminal 11 and the other lead wire to terminal
12. The G3PX will malfunction if you do not connect
the CT Unit to the G3PX.
2. The rated current and voltage of G3PX models when
reset are as follows:
EH-series models: 12 mA at 12 VDC
EHN- and EC-series models: 1 mA at 12 VDC
Load
With continuous load current.
With load current shut off.
