Dwyer 32DZ - Manual (Page 5)

June, 2000 Page 5 of 40 949-1318
WIRING
WARNING: The inputs of the instrument are not isolated
from each other. The input sources must be isolated
from each other. Thermocouples MUST be of the
isolated junction type. Process inputs may not share a
common external ground.
FAILURE TO OBSERVE THIS WARNING MAY CAUSE
DANGEROUS OR LETHAL VOLTAGES TO BE PRESENT
IN THE INSTRUMENT WHICH MAY CAUSE SERIOUS
INJURY OR DEATH.
DO NOT RUN SIGNAL (CLASS 2) WIRING IN THE
SAME CONDUIT OR CHASE AS THE POWER WIR-
ING. ERRATIC OPERATION OR DAMAGE TO THE
INSTRUMENT CIRCUITRY WILL RESULT.
For thermocouple input always use extension leads of the same type
designated for your thermocouple.
For supply connections use No. 18 AWG wires rated for at least 75°C. Use
copper conductors only. All line voltage output circuits must have a
common disconnect and be connected to the same pole of the disconnect.
Input wiring for thermocouple, voltage, current, and RTD; and output wiring
for current, DC SSR, and 5 VDC is rated CLASS 2.
Use only the type of thermocouple or RTD probe for which
the control has been programmed. Maintain separation
between wiring of sensor, auxiliary in or out, and other wiring.
See the "Secure Menu" for input selection.