MPE DP SERIES II, Operating And Service Manual

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3.6 Digital Input and Output Lines
All digital input and output control lines are connected to connector JS1 located on the rear
panel. The master and slave modules have identical connectors. As illustrated in figure 3.28, the
digital input lines are start, stop, clear, arm, and interlock set. Functionally, the first four digital
input control lines emulate the functions on the front panel when external control is enabled.
Enabling external control and external interlock is described in Section 3.1.1.3 and 3.1.2.2 for
DPD and DPA Series power supplies, respectively.
Figure 3.28 Digital input control lines
Interlock set requires a either a physical short between terminals 26 and 37 of connector JS1 or
application of a 5.0 V source with the positive connection at terminal 37 of JS1 and the negative
connection at terminal 7 of JS1. One of these two connections must be made to enable operation
of the power supply. If the interlock connection is broken then the loc (interlock) LED lights
and the power supply shuts off. As illustrated, digital control lines may be paralleled with other
supplies to allow simultaneous control.
Digital output control lines provide the means to monitor diagnostic functions as well as mode of
operation (voltage or current). All digital output control lines, as illustrated in Figure 3.29, are
connected to connector JS1. Refer to this figure for terminal identification. Each output
monitoring line can drive a 5.0 V, 5.0 mA load. An alarm condition will produce a 5.0 V output
at the respective terminal.
3.7 Diagnostic Functions
Diagnostic functions of the master and slave modules include thermal overload, interlock, power,
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