TEK-TCG 01-G-Manual-v6-052021
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8.
FACTORY HARDWARE OPTIONS
Power Supply Options
This table shows the three different power supply configurations that may be ordered with
TCG 01-G.
Designator
DC Input Range
L (Low)
14 - 36 Vdc
M (Medium)
20 - 75 Vdc
H (High)
90 - 300 Vdc
High Voltage (MOSFET) Output Option
The TCG 01-G may be ordered with either or both of the
P2
and
P3
outputs configured with a
high voltage FET switching transistor instead of the standard 5 V logic output. When fitted in
this manner, each output can switch a 300 V DC, 100 mA external load.
External wiring should be arranged so that the external high voltage supply line (up to 300 V DC
max) is connected, via a fuse, to the load (Figure 11). The return connection from the load is
then wired to one terminal of the
P2 (or P3)
output, and the other terminal of the
P2 (or P3)
output is then wired to complete the circuit back to the other side of the power supply. Do not
connect the high voltage supply to P2 or P3 unless the high voltage option is fitted – check the
label on the base or side of the TCG 01-G unit.
Output isolation (from chassis and other I/O) is still maintained when the HV option is fitted.
This simplifies the external load/supply arrangements, particularly when operating with
positive-earth systems – as in many utility facilities.
IMPORTANT! Failure to check that the high voltage option is fitted before connecting
the high voltage supply may result in hardware damage.
It is the user’s responsibility to provide adequate protection in the form of an
external fuse to protect the external power supply, the TCG 01-G output switch and
the load.
Note: At all times, the polarity of the P2 (P3) connections should be such that conventional
current flow is into the “+” terminal and out of the “-” terminal – i.e. “+” is at higher positive
potential than “-”. Failure to observe the polarity will result in the output being permanently
on, regardless of the state of the output.
