ABB AX416 User Manual page 68

Single and Dual Input Analyzers for pH/Redox (ORP)
AX416, AX436, AX460, AX466 & AX468
Relay Outputs - On/Off
Number of relays
Three supplied as standard or five with option board fitted
Number of set points
Three supplied as standard or five with option board fitted
Set point adjustment
Configurable as normal or failsafe high/low or diagnostic alert
Hysteresis of reading
Programmable 0 to 5% in 0.1% increments
Delay
Programmable 0 to 60s in 1s intervals
Relay contacts
Single-pole changeover
Rating 5A, 115/230V AC, 5A DC
Insulation
2kV RMS contacts to earth/ground
Analog Outputs
Number of current outputs (fully isolated)
Two supplied as standard or four with option board fitted
Output range
0 to 10mA, 0 to 20mA or 4 to 20mA
Analog output programmable to any value between
0 and 22mA to indicate system failure
Accuracy
±0.25% FSD, ±0.5% of reading (whichever is the greater)
Resolution
0.1% at 10mA 0.05% at 20mA
Maximum load resistance
750Ω at 20mA
Configuration
Can be assigned to either measured variable or either sample
temperature
Digital Communications
Communications
Profibus DP (with option board fitted)
66
Control Function - AX460 Only
Controller Type
P, PI, PID (configurable)
Control Outputs
Output
Can be assigned a maximum of two relays, two analog outputs or
one of each
Analog
Current output control (0 to 100%)
Time proportioning cycle time
1.0 to 300.0s, programmable in increments of 0.1s
Pulse frequency
1 to 120 pulses per minute, programmable in increments of
1 pulse per minute
Controller action
Reverse, direct or bi-directional (programmable)
Proportional band
0.1 to 999.9%, programmable in increments of 0.1%
Integral action time (Integral reset)
1 to 7200s, programmable in increments of 1s (0 = Off)
Derivative
0.1 to 999.9s programmable in increments of 0.1s, available only for
single set point control
Auto/Manual
User-programmable
Access to Functions
Direct keypad access
Measurement, maintenance, configuration, diagnostics or service
functions
Performed without external equipment or internal jumpers
Sensor Cleaning Function
Configurable cleaning action relay contact
Continuous
Pulse in 1s on and off times
Frequency
5 minutes to 24 hours, programmable in 15 minute increments up to
1 hour then in 1 hour increments for 1 to 24 hours
Duration
15s to 10 minutes, programmable in 15s increments up to
1 minute then in 1 minute increments up to 10 minutes
Recovery period
30s to 5 minutes, programmable in 30s increments
9 SPECIFICATION
IM/AX4PH Issue 9