TTI EX354D Manuel D'instructions page 3

The EX354D and EX354Tv provide high levels of power (up to 305 watts) in a compact and
attractive case style.
High resolution controls allow precise setting of voltage and current levels which are indicated on
accurate and legible digital meters.
Excellent line and load regulation are matched by low noise and good transient response. High
power efficiency ensures that the unit remains cool without any fan noise.
The EX354D has two independent and isolated outputs each with a 0 to 35V, 0 to 4A capability.
The outputs operate in constant voltage or constant current mode with automatic cross-over and
mode indication. Each output has its own on-off switch. Where higher voltages or currents are
required the outputs can be wired in either series or parallel to provide voltages up to 70 volts or
currents up to 8 Amps.
The EX354Tv has, in addition, an Auxiliary 'logic voltage' output with a 5A current capability. To
reflect the increasing usage of low-voltage logic devices, this output can be preset between
1.5 volts and 5 volts via a front panel control.
The total power capability is 280 watts for the dual supply and 305 watts for the triple.
The EX series incorporates separate digital voltage and current meters on each main output. The
meters use bright 14mm (0·56") LED displays and have an update rate of 4 per second providing
near instantaneous response. Simultaneous metering of voltage and current provides accurate
information "at a glance" and avoids any possibility of misinterpretation. When an output switch is
set to "off", the current limit setting is displayed enabling conditions to be set before the load is
connected. With the right-hand main output off, the right-hand meters can be used to
momentarily display the preset Auxiliary voltage and current limit.
The EX series has been designed to meet the stringent requirements of relevant IEC standards
for safety and EMC, including harmonics emissions. All outputs are intrinsically short circuit proof,
and are protected against external voltages and reverse currents.
MAIN OUTPUTS
Voltage Range:
Current Range:
Output Voltage Setting:
Output Current Setting:
Operating Mode:
Output Switch:
Output Terminals:
Output Impedance:
Output Protection:
Load Regulation:
Line Regulation:
Ripple & Noise
(20MHz bandwidth):
2
0V to 35V minimum.
0A to 4A minimum.
By coarse and fine controls.
By single logarithmic control.
Constant voltage or constant current with automatic cross-over.
Electronic. Preset voltage and current displayed when off.
Universal 4mm safety binding posts on 19mm (0.75") pitch.
Typically <5mΩ in constant voltage mode.
Typically >50kΩ in constant current mode.
Output will withstand up to 40V forward voltage.
Reverse protection by diode clamp for reverse currents up to 3A.
<0.01% of maximum output for 90% load change.
<0.01% of maximum output for 10% line change.
Typically <2mVrms, <10mVpk-pk (CV mode).
Introduction
Specification