MODEL: ABF3

ABF3 SPECIFICATIONS

ES-2614 Rev.12 Page 2/7

http://www.m-system.co.jp/

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.

EXTERNAL

FRONT CAS-MAN SELECTOR

CONTACT

CAS

MAN

ON

MAN

MAN

OFF

CAS

MAN

■Recommended solderless terminal

3.3 (.13) max

mm (inch)

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)