Installation
3/07 UDC3500 Universal Digital Controller Product Manual 15
Specifications
Alarm Outputs
(Optional)
A maximum of four alarm relays are available, depending upon the type and quantity of
outputs used for control purposes. Each alarm may have one or two setpoints, each of which
can be independently set as high or low alarm. Setpoints can be on any Input, Process
Variable, Deviation, Manual Mode, Failsafe, PV Rate, RSP Mode, Communication Shed, or
Output. A single adjustable hysteresis of 0.0 to 100.0% is provided. The alarm can also be
set as an ON or OFF event at the beginning of a Setpoint Program Ramp or Soak segment.
Alarm status is accessible via any communications port and is shown on the display
annunciators.
Isolation (Functional)
AC Power: Electrically isolated from all other inputs and outputs and earth ground to
withstand a HIPOT potential of 1900 Vdc for 2 seconds per Annex K of EN61010-1.
Analog Inputs and Outputs: Are isolated from each other and all other circuits to withstand a
HIPOT potential of 850 Vdc for 2 seconds per Annex K of EN61010-1.
Digital Inputs and Digital Outputs: Electrically isolated from all other circuits to withstand a
HIPOT potential of 850 Vdc for 2 seconds per Annex K of EN61010-1.
Relay Contacts: With a working voltage of 115/230 Vac, these are electrically isolated from
all other circuits to withstand a HIPOT potential of 345 Vdc for 2 seconds per Annex K of
EN61010-1
RS422/485 Modbus
RTU
Communications
Interface (Optional)
Baud Rate: 4800, 9600,19,200 or 38,400 baud selectable
Data Format: Floating point or integer
Length of Link:
2000 ft (600 m) max. with Belden 9271 Twinax Cable and 120 ohm termination resistors
4000 ft. (1200 m) max. with Belden 8227 Twinax Cable and 100 ohm termination resistors
Link Characteristics: Two-wire (half-duplex), multi-drop Modbus RTU protocol, 15 drops
maximum or up to 31 drops for shorter link length.
Ethernet TCP/IP
Communications
Interface (Optional)
Type: 10Base-T
Length of Link: 330 ft. (100 m) maximum. Use Shielded twisted-pair, Category 5 (STP
CAT5) Ethernet cable.
Link Characteristics: Four-wire plus shield, single drop, five hops maximum
IP Address: IP Address is 10.0.0.2 as shipped from the Factory
Recommended network configuration: Use Switch rather than Hub in order to maximize
UDC Ethernet performance.
Configuration: Ethernet parameters are configured via the Process Instrument Explorer.
Email: The capability to send two different Emails is provided. These must be configured via
the Process Instrument Explorer. It is recommended that the Real Time Clock Option be
purchased for any instrument that needs to send Email.
Ethernet Communications is mutually exclusive with the Second Current Output.
RS-485 and Ethernet
Transaction rates
Host computer must allow a minimum of 20 milliseconds between Read transactions and a
minimum of 200 milliseconds between Write transactions.
Infrared
Communications
(Standard)
Type: Serial Infrared (SIR)
Length of Link: 3 ft. (1 m) maximum for IrDA 1.0 compliant devices
Baud Rate: 19,200 or 38,400 baud selectable
Power Consumption 24 VA maximum (90 to 264 Vac)
18 VA maximum (24 Vac/dc)
Power Inrush Current
10A maximum for 4 ms (under operating conditions), reducing to a maximum of 265 mA (90
to 264 Vac operation) or 900 mA (24 Vac/dc operation) after one second.
CAUTION
When applying power to more than one instrument, make sure that sufficient
power is supplied. Otherwise, the instruments may not start up normally due to voltage drop
from the inrush current.
Weight
3 lbs. (1.3 kg)
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