Ametek CSW5550 User Manual page 33

User Manual
3.6.2.1 /Inhibit (Remote Inhibit)
The /Inhibit input J32 pin 7 can be used to open and close the output relay of the power source.
This input overrides the state of the output relay programmed from the front panel or the bus. It
may be used for safety interlock purposes.
The default level for remote inhibit is a logic low or contact closure between pin J32-7 and pin J23-6
(ISOCON). This will cause the output voltage to be programmed to 0.0 volts and the output relays
to open. Alternative, the level can be reversed using the "output:ri:level high" command over the
bus.
The mode of operation of the remote inhibit can be changed using the Output mode bus command.
This command selects the mode of operation of the Remote Inhibit protection. The following
modes can be selected:
LATChing
LIVE
OFF
The RI output state is saved at power down. The factory default state is LIVE.
For details on programming the remote inhibit function, refer to the CSW programming manual
3.6.2.2 External Signal Inputs
The External Signal Inputs are for either a DC or Direct waveform inputs. The DC input is
programmed by enabling the RPV function. This function is also called the External Gain
Control. A 0 to 7.07 volt DC input will adjust the output voltage from 0 to a full-scale output.
3.6.2.3 Remote Sense Connector TB3
It is important that the remote sense connections are hooked up at the load for the programmed
voltage to be correct at a load with high load currents. For single-phase systems, connect Phase
A to phase A and neutral to neutral. For three-phase system configurations, connect all three
phase and neutral.
If the sense lines are not connected the power source has internal resistors that will connect the
sense lines to the Master power source output terminals.
NOTE: Do not reverse or swap sense connection phasing or damage to the unit may
result.
For systems consisting of multiple CSW5550 chassis, the end user has to connect the external
sense inputs of the Master power source for the correct External sense function. The Auxiliary
power sources will have no control of the output voltage. Refer to Figure 3-3 for an illustration of
the power source rear panel and the Remote Sense terminal strip. Note that there are multiple
Neutral terminals for TB3. The terminals are all connected in parallel in the power source. Only
one terminal needs to be connected to the sense point.
CSW Series
A TTL low at the RI input latches the output in the protection shutdown state,
which can only be cleared by OUTPut:PROTection:CLEar.
The output state follows the state of the RI input. A TTL low at the RI input turns
the output off; a TTL high turns the output on.
The instrument ignores the RI input.
California Instruments
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