EZT-570S User Manual
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8.6.4.1
DUT Safety Relay Output Wiring
The DUT safety relay connection is provided as standard on most chambers. To connect to this
relay, locate the digital output connector on your chamber. The DUT connection is located on the
digital output connector panel (see Figure 8-19).
The DUT safety relay is an isolated dry contact rated for up to 2A of current (resistive) at 24V AC/DC.
It provides an effective and safe method of removing power from test items within the chamber any
time the chamber is not running. Leaving devices powered within a chamber that is not operating can
cause catastrophic damage to the test item and/or chamber in very short periods of time depending
upon the heat output of the device.
8.6.4.2
Digital Output Wiring
Locate the digital output connector on your chamber. Figure 8-19 is a representation of the typical
digital output connection provided on most chambers; however, as changes and/or improvements are
made, your specific connection style may vary.
If using the digital outputs for low level signals to solid state circuitry, it is recommended that all wiring
be of the shielded type. Only connect the drain wire of the shielded wiring at your device, or the
chamber, not both. Connecting the shield to ground at both ends of the cable can induce unwanted
“noise” into the wiring and subsequently, your device.
If using the digital inputs for controlling other relays coils or powering small devices, the wiring
method is at the operator’s discretion, but a minimum of #24AWG wire is recommended. Low voltage
signals can become quickly degraded when using smaller gauge wire due to the resistance of the
wire over long distances.
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