Series EJ, ET, EY, FJ & FR
102002-177 Rev M2
36
\1020\02177M2.doc 17 Jun 2019
J3-20 HV ENABLE
When the ENABLE REM/LOC switch is set to the REMOTE position, an external
positive 2.5-15 V source (with respect to COMMON at J3-11) will enable the
supply. A 0-1.5 V signal at this input will disable the supply (See INTERFACE
DIAGRAM FIG 2). When the ENABLE REM/LOC switch is set to the local
position HV ENABLE is always enabled.
NC Option Users: This input must be jumpered to REFERENCE (J3-12) if no
external HV ENABLE signal is used.
J3-21 HV STATUS
When the supply is enabled to produce HV, the HV status signal goes from a low to
a high state and stays high until the HV is disabled.
High is a 1k resistor pull up to +5V.
Low is 0V (common) and can sink up to 5mA.
J3-22 FAULT STATUS
During normal operation, this signal is low and goes high when a fault occurs. It
stays high until the fault is cleared. If the supply is enabled and generating HV when
the fault occurs, the HV will be disabled and consequently the HV status signal will
go low as well as the fault signal going high.
A fault can be either under voltage, over temperature or a faulty fan.
High is a 1k resistor pull up to +5V.
Low is 0V (common) and can sink up to 5mA.
J3-23 MODE STATUS
During operation in voltage mode, this signal will be low. During operation in
current mode, this signal will be high.
High is a 1k resistor pull up to +5V.
Low is 0V (common) and can sink up to 5mA.
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