ES-2614 Rev.14

ABF3

Final Control Elements

ANALOG BACKUP STATION

(with bargraph/digital indicator)
Functions & Features
• Holds and manipulates control signals in case of computer or DCS failure
• Bargraph indicator
• Digital display indicating PV/CAS/MV selectable
• External contact closure to switch operation modes
• MV outputs CAS input signal at power down (for /T option)
Typical Applications
• Computer and DCS backup applications
• Used as manual-auto controller

MODEL: ABF3–[1][2][3]-[4][5]

ORDERING INFORMATION

• Code number: ABF3-[1][2][3]-[4][5]
Specify a code from below for each of [1] through [5].
(e.g. ABF3-AAA-M2/C/T)
• Scale (Refer to 'SCALE PLATE' section for details on the scale.)

[1] PV INPUT

Current
A: 4 – 20 mA DC (Input resistance 25 Ω)
D: 0 – 20 mA DC (Input resistance 25 Ω)
Voltage
4: 0 – 10 V DC (Input resistance 1 MΩ min.)
5: 0 – 5 V DC (Input resistance 1 MΩ min.)
6: 1 – 5 V DC (Input resistance 1 MΩ min.)
4W: -10 – +10 V DC (Input resistance 1 MΩ min.)
5W: -5 – +5 V DC (Input resistance 1 MΩ min.)

[2] CAS INPUT

Current
A: 4 – 20 mA DC (Input resistance 25 Ω)
（For /T option, maximum input resistance 80 Ω）
D: 0 – 20 mA DC (Input resistance 25 Ω)
Voltage
4: 0 – 10 V DC (Input resistance 1 MΩ min.)
5: 0 – 5 V DC(Input resistance 1 MΩ min.)
6: 1 – 5 V DC (Input resistance 1 MΩ min.)
4W: -10 – +10 V DC (Input resistance 1 MΩ min.)
5W: -5 – +5 V DC (Input resistance 1 MΩ min.)

[3] MV OUTPUT

Current
A: 4 – 20 mA DC (Load resistance 750 Ω max.)
(For /T option, the load resistance is 25 Ω less than the
CAS input equipment's load resistance.)
D: 0 – 20 mA DC (Load resistance 750 Ω max.)
Voltage
4: 0 – 10 V DC (Load resistance 10 kΩ min.)
5: 0 – 5 V DC (Load resistance 5000 Ω min.)
6: 1 – 5 V DC (Load resistance 5000 Ω min.)
5W: -5 – +5 V DC (Load resistance 5000 Ω min.)

[4] POWER INPUT

AC Power
M2: 100 – 240 V AC (Operational voltage range 85 – 264 V, 50/60 Hz)
DC Power
R: 24 V DC
(Operational voltage range 24 V ±10 %, ripple 10 %p-p max.)

[5] OPTIONS (multiple selections)

Bargraph Indicator
blank: PV input
/C: CAS input
/M: MV output
MV Output at Power Down
blank: Output off
/T: CAS input
(Applicable CAS input and MV output: 4 - 20 mA DC)

SPARE PARTS

• Scale plate

GENERAL SPECIFICATIONS

Construction: Panel flush mounting
Degree of protection: IP65; applicable to the front panel for single unit mounted according to the specified panel cutout
Connection: M3 separable screw terminal (torque 0.6 N·m)
Solderless terminal: Refer to the drawing at the end of the section.
Recommended manufacturer: Japan Solderless Terminal MFG.Co.Ltd, Nichifu Co.,ltd
Applicable wire size: 0.25 to 1.65 mm² (AWG 22 to 16)
Screw terminal: Nickel-plated steel
Housing material: Flame-resistant resin (gray)
■ BUTTONS
Digital display selector (IND): Switches between PV input, CAS input, MV outout; Manual operation ramp rate, Retroactive time period, or Transition amp rate
Manual output switching: CAS (cascade)/MAN (manual) selector ('OUT'); the mode selected before power OFF is recovered when the power is turned on.
Remote output switching: External contact closure switches the ABF3 to MAN mode when the CAS/MAN selector is at CAS position; Not switched with MAN position.
■ FUNCTIONS
Manual status contact: Turns on when manual operation is available
Manual operation ramp rate: 15 sec./100 %. (Add 0.3 sec. for the total time required to go from 0 % to 100 %.) Adjustable up to 30 sec. in 1 sec. increments with front control buttons
Retroactive time period at switching CAS to MAN: 0 sec. plus response time. Adjustable up to 30 sec. in 1 sec. increments with front control buttons
When the loop has been turned to MAN control with remote outputs switching command, the MV output goes back by the preset time period and holds the output.
Ramp rate at switching MAN to CAS: 1 sec./100 %. Adjustable up to 30 sec. in 1 sec. increments with front control buttons
If the CAS control value at the moment of switching from MAN to CAS mode is deviated from the MV output value in MAN control, the ABF3 adjusts the difference gradually in the preset ramp rate.
Receiving MAN command during transition ramp period, the ABF3 turns to MAN mode after transition ramp function is completed.
Isolation: PV input to CAS input to MV output to MAN status contact output to remote output switching command input to power
(For /T option, non-isolated between CAS input and MV output)
■ SCALE PLATE: Flame resistant resin
(replaceable at the front; white scale & characters on black base)
Scale: Max. 4 characters including decimal point and negative sign
• Divisions: Min. 21, max. 43.9
• Engineering unit: Max. 4 characters (Unit other than % also can be specified)
■ LEDs
CAS output LED: Red LED turns on in CAS mode.
MAN output LED: Red LED turns on in MAN mode.
PV LED: Red LED turns on with PV indication at PV input.
Green LED turns on while setting the manual operation ramp rate.
CAS LED: Red LED turns on with CAS indication at CAS input.
Green LED turns on while setting the retroactive time period.
MV LED: Red LED turns on with MV indication at MV output.
Green LED turns on while setting the transition ramp rate.
MODE LED: Red LED turns on with the firmware version indication.
Green LED turns on but Not Used.

■Recommended solderless terminal

BARGRAPH/DIGITAL DISPLAY

■ BARGRAPH: PV input, CAS input or MV output
LED: 55 segments, red, 55.5 mm (2.19") long, 3.0 mm (.12")
wide
■ DIGITAL INDICATOR: PV input, CAS input, MV output;
Setting values for Manual operation ramp rate, Retroactive
time period, or Transition ramp rate are displayed by switching.
LED: 4 digits, red, 10 mm (.39") high, 24 mm (.94") wide
Decimal point position: One decimal places fixed
Scaling range: -15 to +115.0%
Zero indication: Higher-digit zeros are suppressed.

INPUT SPECIFICATIONS

PV input, CAS input: -15.0 to +115.0 %
■ Remote Output Switching Command Input
Sensing (open): Approx. 5 V DC
ON voltage: ≤ 2.3 V DC (ON resistance: ≤ 100 Ω/ON current: ≥ 2 mA)
OFF voltage: ≥ 0.75 V DC (OFF resistance: ≥ 1 kΩ/OFF current: ≤ 1.5 mA)

OUTPUT SPECIFICATIONS

MV output: -15.0 to +115.0 %, 0.1 % increments
MV Conformance range: 0 – 100 %
■ Manual Status Contact Output
Rated load: 120 V AC @ 1 A (cos ø = 1)
240 V AC @ 0.5 A (cos ø = 1)
30 V DC @ 1 A (resistive load)
Electrical life ≥ 10⁵ cycles (rate 6 cycles/min.)
Minimum load: 5 V DC @ 24 mA (Approx. 120 mW)
Mechanical life: ≥ 5 × 10⁶ cycles (rate 180 cycles/min.)

INSTALLATION

Power consumption
•AC:
Approx. 4 VA at 100 V (For /T option, approx. 5 VA)
Approx. 6 VA at 264 V (For /T option, approx. 7 VA)
•DC: Approx. 3.5 W
Operating temperature: -5 to +55°C (23 to 131°F)
Operating humidity: 30 to 90 %RH (non-condensing)
Mounting: Panel flush mounting
Weight: 300 g (0.66 lb)

PERFORMANCE in percentage of span

Accuracy: Input accuracy + output accuracy
•Input accuracy: ±0.2 % of input range
•Output accuracy: ±0.1 % of output range
Display accuracy:
•Bargraph display: ±2 %
•Digital display: ±0.3 % (including ±1 digit)
Temp. coefficient: ±0.02 %/°C (±0.01 %/°F)
Manual output resolution: 0.1 %
Response time: ≤ 0.5 sec. (0 – 90 %) with CAS input
Output memory at power OFF: E²PROM (non-volatile memory)
Line voltage effect: ±0.1 % over voltage range
Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 1500 V AC @ 1 minute (PV input to CAS input to MV output to MAN status contact output to remote output switching command input to power to ground)
(For /T option, non-isolated between CAS input and MV output)

SCALE PLATE

EXTERNAL VIEW

EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]

PANEL CUTOUT unit: mm

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM