Specification Sheet

51-52-03-36
Page 7
Specifications
Design
Digital Inputs (Two) (Optional) +30 Vdc source for external dry contacts or isolated solid state contacts. Digital Inputs
are isolated from line power, earth ground, analog inputs and all outputs except for the
Second Current Output.
On contact closure the controller will respond according to how each digital input is
configured. Opening the contact causes a return to previous state.
The second Digital Input is mutually exclusive with the Second Current Output.
Controller Output Types
Electromechanical Relays (One or Two)
SPDT contacts. Both Normally Open and Normally Closed contacts are brought out to
the rear terminals.
Internally socketed
Resistive Load: 5 amps @ 120 Vac or 240 Vac or 30 Vdc
Inductive Load (cos
ϕ = 0.4): 3 amps @ 130 Vac or 250 Vac
Inductive Load (L/R = 7 msec): 3.5 amps @ 30 Vdc
Motor: 1/6 H.P.
Dual Electromechanical Relays
Two SPST relays. One Normally Closed contact for each relay is brought out to the
rear terminals. This option takes the place of one of the above electromechanical
relays, and is especially usefull for Time Duplex or Three Position Step Control
applications. Instruments with this option can have a total of 4 relays plus one current
output.
Internally socketed
Resistive Load: 2 amps @ 120 Vac, 240 Vac or 30 Vdc
Inductive Load (cos
ϕ = 0.4): 1 amp @ 130 Vac or 250 Vac
Inductive Load (L/R = 7 msec): 1 amp @ 30 Vdc
Solid State Relays (One or Two)
Zero-crossing type SPST solid state contacts consisting of a triac N.O. output.
Internally socketed.
Resistive Load: 1.0 amp @ 25°C and 120 or 240 Vac
0.5 amp @ 55°C and 120 or 240 Vac
Inductive Load: 50 VA @ 120 Vac or 240 Vac
Minimum Load: 20 milliamps
Open Collector Outputs (One or Two)
Socketed assembly replacing a relay. Opto-isolated from all other circuits except
current output, but not from each other. Internally powered @ 30 Vdc.
Note: Applying an external power supply to this output will damage the instrument.
Maximum Sink Current: 20 mA
Overload Protection: 100 mA
Current Outputs (One or Two)
These outputs provide a 21 mA dc maximum into a negative or positive grounded load
or into a non-grounded load. Current outputs are isolated from each other, line power,
earth ground and all inputs. Outputs can be easily configured via the keyboard to be 0
to 20 or 4 to 20 mA without field calibration and for either direct or reverse action.
The second current output can be used in an Auxiliary Output mode. This Auxiliary
Output can be configured to represent either Input, PV, Setpoint, Deviation, or Control
output. The range of an Auxiliary Output can be scaled per the range of the selected
variable and can be set anywhere between 0 to 21 mA.
The Second Current Output is mutually exclusive with the second Digital Input.
Resolution: 12 bits over 0 to 21 mA
Accuracy: 0.05% of full scale
Temperature Stability: 0.01% F.S./°C
Load Resistance: 0 to 1000 ohms
Alarm Outputs (Optional) One SPDT electromechanical relay. A second alarm is available if the second control
relay is not used for control purposes.
Up to four setpoints are independently set as high or low alarm, two for each relay.
Setpoint 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 ramp/soak segment.
Alarm Relay Contacts Rating
Resistive Load: 5 amps at 120 Vac or 240 Vac or 30 Vdc