DIGITAL INDICATOR WITH RELAY OUTPUTS
MODEL: AK-62
DESCRIPTION
The Controller has one display windows on the front panel for
The AK-62 is a fully configurable microcontroller based Digital indication of Process value and the set-point values. Two LED
Indicating controller in a compact, rugged & reliable execution. The indications show the status of the two control Relays.
instrument has a four-digit red LED seven-segment digital display on
the front panel to continuously indicate the real time process value
and other menu options. CONTROL KEYS
The Process value display can indicate any scale range between -999 The instrument has three keys on the front panel, the functions of
to +9999 units The instrument has non-volatile memory (i.e., in case which are described below:
of power failure, the set points and other settings are retained in
memory and the indication and control actions resume after power is The PROGRAM key is the central co-ordinating key for
restored). PROG accessing the settings of the instrument. Pressing this Key, one
can sequentially view, change and save the parameters such
The instrument accepts a 4 to 20 mA DC current loop signal at the as Zero & Span settings, Decimal Points, Relay Set-points for
input. An auxillary power supply output of 24 V DC is available at the control action, Hysterisis, etc.
terminals. The instrument may therefore be used in either two-wire or
four-wire configuration. [The instrument is calibrated as specified. This The INC or Incrementing key allows the operator to select the
calibration may be changed by the end-user by following the numeral in the digit being set. The digit will sequentially display
instructions under the “CONFIGURATION / CALIBRATION” section]. INC 0, 1, 2….9 on each pressing of the INC key. This may be used
The AK-62 provides two Relay outputs, the set points of which may to set the Zero/Span and Set-points of the displays.
be set through the Membrane Keypad on the front panel [see
CONFIGURATION – INITIAL SETTINGS section]. The instrument also The DEC or Decrementing key allows the operator to select the
provides an RS-485 communication signal on MODBUS RTU numeral in the digit being set. The digit will sequentially display
(optional). It operates on universal AC power supply (90 to 270 V AC, DEC 9, 8, 7….0 on each pressing of the DEC key. This may be used
50/60 Hz) and is offered in standard 1/8 DIN panel-mount execution. to set the Zero/Span and Set-points of the displays.
INSTALLATION
The instrument should be mounted in the cutout (44 x 92 mm) on the TERMINAL DIAGRAM
panel using the mounting clamps provided. All inter-connections to
the instrument should be made with strong multi-strand wire of the
order of 2.5 sq.mm. The ends of the wires should be properly ferruled UPPER TERMINAL BLOCK
and suitably terminated. 1 2 3 4 5 6 7 8
The cables carrying the Input Signal should be properly isolated from L N E + - + -
the Power Line cables, to prevent any electromagnetic interference or 90–270 VAC, 50 hz 4 to 20mA X
24 V DC
noise-related malfunctions from the Mains Power Line. Use of Universal AC power I/P
shielded twisted pair cable is recommended for the input signal. It is
essential that the instrument be earthed to a proper grounding point
LOWER TERMINAL BLOCK
before connecting the power supply. The voltage between the Earth
and Neutral terminals should be negligible (Approx. 1 V AC). 9 10 11 12 13 14 15 16
+ - NO C NC NO C NC
After connecting the input signal to a suitable source, the power may 4 to 20 mA
be switched ON. The instrument must first be configured and then RELAY–2 RELAY–1
O/P
calibrated (see sections below).
TERMINAL DETAILS
OPERATION & SETTINGS
TERMINAL TERMINAL
The front panel of the AK-62 Digital Indicating Controller is as shown NOTATION DETAILS
BLOCK NO.
below : 1 L (Line) 90 to 270 VAC,
2 N (Neutral) 50 / 60 Hz
3 E (Earth) AC POWER SUPPLY
4 +
UPPER 24 V DC
5 -
6 + 4 to 20 mA DC
7 - I/P
8 X No Conn
9 + 4 to 20 mA DC
10 - O/P
11 NO
12 C RELAY – 2
LOWER
13 NC
14 NO
15 C RELAY – 1
16 NC
CONFIGURATION (INITIAL SETTINGS)
After the instrument is properly connected to the mains power supply and input signal, the Initial Settings of the Digital Indicating Controller must
first be done. Only after the Initial Settings are completed, the instrument can be calibrated. An external current source is NOT REQUIRED for
calibration. During Calibration, the Display will “Time-Out” after 5 seconds (i.e., if no key is pressed for 5 seconds, the displays will return to their
“normal” states). The following is the sequence of settings to be carried out on the Controller before first use :
All settings to be done using Increment () and Decrement () keys.
KEY ALTERNATING
DISPLAY FUNCTION
PRESSED DISPLAY
Press
Decrement
() key
together for
2 seconds
Enter the number of Relays actually being used in the
application. [Options are 0/1/2].
PROG
Pt 0002 This feature may be used to temporarily disable the use of
P
one or more Relays in the instrument. e.g., if the User needs
to use both Relays, select 2.
This indicates an Analog Input signal (4 to 20 mA DC in this case).
PROG
SEn U – I The input signal is fixed for this application and hence no selection is
P
available.
PROG Set the Decimal Position. [Applicable for Current Input
dP 0000
P only]..
The desired Zero (lower) range setting for the process
PROG
RngL 0000 being measured may be set using INC and DEC keys.
P
The minimum Zero level possible is –999.
The desired Span (upper) range setting for the process
PROG
RngH 5000 being measured / controlled may be set using INC and
P
DEC keys. The maximum Span level possible is 9999.
PROG On/Off or PID control action selection
Con On
P (“On” to be selected for your application).
PROG
S – Id 0001 Slave Identity number (range is from 0001 to 0255)
P
PROG
ASHE (process value) Normal process value
P
PROG Default factory Adjust the desired Set-Point for Relay-1 using INC and
Set1
P setting DEC keys. [Range is –999 to 9999].
Process Value Hysterisis : Adjust the desired Hysterisis
PROG
HY1 0001 for Relay-1 using INC and DEC keys
P
[e.g. 0010 for a hysterisis of 10 degrees].
PROG Adjust the desired Control Logic for Relay-1 using INC
LOG1 h I
P and DEC keys. [Options are HI / LO].
PROG Default factory Adjust the desired Set-Point for Relay-2 using INC and
Set2
P setting DEC keys. [Range is –999 to 9999].
Process Value Hysterisis : Adjust the desired Hysterisis
PROG
hY2 0001 for Relay-2 using INC and DEC keys
P
[e.g. 0010 for a hysterisis of 10 degrees].
PROG Adjust the desired Control Logic for Relay-2 using INC
LOG2 h I
P and DEC keys. [Options are HI / LO].
PROG
ASHE (process value) (if Input Signal is connected)
P
