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PRESYS
| Instruments
2.2 - Electrical Installation
The DCY-2050 and 2051 controllers may be powered by any voltage between 90
and 240Vac or Vdc. Note that power is always applied to the internal circuit when the
instruments are connected to the AC supply.
Make the connections of the process input and output signals to the instrument
with the power off.
Refer to figure 3 on instrument I/O terminal designations for power supply,
grounding, communication and process input and output signals.
Signal cables should be kept as far away as possible from the power supply
cables..
Since the instrument housing is a metallic case it will be necessary to connect the
instrument ground terminal (gnd earth) to the local earth ground; this terminal should
never be connected to the neutral loop terminal.
INPUT 1
INPUT 2
COMMUNICATION
2.3 - Process Input Signal Connections
The DCY-2050 and 2051 controllers in their two standard universal inputs can be
connected to thermocouples, 2 or 3-wire RTDs, mA, mV or V. In order to know the input
sensor types and spans refer to table 1, section 1.3 on Technical Specifications.
The enabling of a certain type of input sensor is obtained by internal jumpers
(refer to section 4.2 on hardware Configuration) and by a proper sensor selection in
configuration time (refer to section 3.2 on Configuration). Therefore, the connections
explained below shall only become effective if the instrument hardware and software are
correctly configured.
COLD JUNCTION
SENSOR
NC
NO
NC
NO
PHASE
NEUTRAL
Fig. 3 - DCY-2050 and 2051 Controller Terminals
COMMUNICATION
OUTPUT 1
OUTPUT 2
OUTPUT 3
NEUTRAL PHASE NO
OUTPUT 4
POWER SUPPLY
POWER SUPPLY
90 to 240Vac
23 (+)
DCY-2050 and DCY-2051
COLD JUNCTION
SENSOR
INPUT 2
INPUT 1
NC
NO
NC
OUTPUT 4 OUTPUT 3 OUTPUT 2
OUTPUT 2 OUTPUT 1
Installation
Page 8
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