IMAC2B009 V2
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
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Ampcontrol Pty Ltd
– ABN 28 000 915 542
iMAC System User Manual
iMAC2B009 V4
– 10/18
A
P
P
R
OV
E
D
FOR
E
X
T
E
R
N
A
L
D
IS
TR
IB
U
T
ION
–
P
R
OP
E
R
T
Y
OF
A
M
P
C
ON
TR
OL
P
T
Y
LTD
–
N
O
T
T
O
B
E
R
E
P
R
OD
U
C
E
D
I
N
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A
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T
Figure 6.4: iMAC2 Controller Terminal Layout
Power Supply
The iMAC2 Controller requires a 24VDC power supply. Refer to Section 12 for further details.
Digital Inputs
There are three general purpose voltage free inputs on the rear on the Controller. These can be used as
general purpose digital inputs to the application (SLP) software. Typical applications of these inputs are for
sequence operation purposes: sequence in, speed switch and reverse sequence control.
The sensing current is 10mA on these inputs. The inputs are surge protected and are electrically isolated
from the rest of the Controller circuitry. The cable connecting the Controller inputs to the voltage free
contacts should be twisted pair, with a maximum length of 20m.
Figure 6.5: General Purpose Input Internal Circuitry
+24VDC
-0VDC
EARTH
SU
P
P
LY
C
R
A
R
SW1+
SW1-
SW2+
SW2-
SW3+
SW3-
COMMON
Rx/T-
Tx/T+
CTS/R-
RTS/R+
IN
P
U
T
1
IN
P
U
T
2
IN
P
U
T
3
R
S2
3
2
/
R
S4
2
2
/
R
S4
8
5
LI
N
E
2
LI
N
E
1
L2-
L2+
EARTH
EARTH
L1-
L1+
24VDC
INCOMING POWER SUPPLY
CONTROL RELAY CONTACT
(Conditioned with Signal Line Healthy)
AUXILIARY RELAY CONTACT
3x VOLTAGE FREE
DIGITAL INPUT CONTACTS
Sensing current is 10mA and inputs should
be via twisted pair with cable being no
longer than 20m
SERIAL COMMUNICATIONS
TERMINALS
(For HOST/PLC/SCADA Connection)
iMAC EARTH:
Not to be connected if Master Line Barrier (MLB)
is used (internally connected to L1- terminal)
L2 FIELDBUS CONNECTION:
Connect to L1 of a parent iMAC
Controller to form an iMAC network
L1 FIELDBUS CONNECTION:
For communication with iMAC modules
PROTECTION EARTH
ETHERNET
10/100Mbps
270Ω
270Ω
180Ω
150Ω
Optocoupler
+1
2
V
d
c
0
V
d
c
Isolated Sensing
Voltage
Vcc
0V
SWx
User
Input
+
-
Maximum length
of 20m
