Operating Instructions DC-xx13 and M31xx
961-00060 rev9 20/25
5.6 Voltage Sensing and Stop
5.7 Isolated Analogue Outputs
5.8 Ethernet, USB and FS1
The optional STOP link may be used to disengage the
mains switch trip to disconnect mains power inside the unit.
A contact closure across these terminals maintains the
power supply.
Some machines utilise a screw terminal strip for voltage
sensing. The two centre screws + & - are connected
internally to the output bars of the machine. Other machines
may use a jack socket for sensing.
The outer two screw connections are connected internally to
the voltage sensing electronics.
Thus, for internal voltage sensing, two links must be fitted as
shown.
For external voltage sensing, the inner two screw
connections are taken to the electrodes for voltage sensing
Optionally, some units are provided with 3 channels of optically isolated
analogue output monitoring. The three process parameters, voltage,
current and power are internally isolated and fed to rear panel BNC
connectors for direct connection to an oscilloscope.
FS1 is a 2 amp anti surge fuse that protects the internal +24V power
supply. Failure of this fuse will result in power supply malfunction.
Since +24VDC is distributed to the external rear connectors, be sure to
check and clear any faults before replacing this fuse.
There are 3 a non isolated USB connectors on the unit. Two at the
front and one on the rear panel. The USB connections are referenced
to the machine internal 0V, which is floating and is at the same potential
as the positive output bar. The shield/earth connections are also
floating. Thus keyboards, mice and memory sticks may be connected
into these points.
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