Series EJ, ET, EY, FJ & FR
102002-177 Rev M2
32
\1020\02177M2.doc 17 Jun 2019
ANALOG REMOTE CONTROL INTERFACE
WARNING! Do not use J3 connections for main earth ground or load return!
E1 ground stud on the rear panel is provided for this purpose.
J3-1, J3-25
GROUND
These terminals should not be used as the main connection to earth ground or for
load return. Use the main ground terminal, “E1”, for that purpose.
J3-1 should be connected to the COMMON terminal J3-2 unless a floating common
is desired
(See J3-2 and INTERFACE DIAGRAM FIG 7)
.
J3-25 terminal is provided for an instrumentation ground connection.
J3-2
POWER COMMON
This COMMON should be jumpered to J3-1 GROUND unless it is desired to allow
COMMON to “float” for isolation or load current measurement purposes. Note that
the load current will flow through J3-1 and J3-2. For that reason, don’t use these
terminals for any other purpose if J3-1 is tied to J3-2. Note that the output voltage
will regulate with respect to COMMON, not GROUND.
When COMMON is floating, it is clamped internally by a bi-directional diode
circuit. The inserted drop of a current measurement shunt between COMMON and
GROUND should not exceed 5V; otherwise, erroneous readings may be obtained
(See INTERFACE DIAGRAM FIG 7)
.
J3-11
DIGITAL COMMON
Digital Signals, such as HV ENABLE, INTERLOCK and status indicator signal
returns, should be connected to J3-11 DIGITAL COMMON and all analog
monitor/programming returns should be connected to SIGNAL COMMON (J3-8)
