AMCI SMD23E2 Series, User Manual

Page: 96 / 134

I
NSTALLING THE
SMD23E2
OR
SMD24E2
SMD23E2 and SMD24E2 User Manual
ADVANCED MICRO CONTROLS INC.
96
1.6 Power Wiring
The SMD23E2 and SMD24E2 accepts 24 to 48Vdc as its input power. This should be derived from a power
limited power supply.
Do not apply 120 Vac to any pins of the SMD23E2 or SMD24E2. If this occurs, the unit
will be damaged and you will void the unit’s warranty.
The SMD23E2 and SMD24E2 units do not have a circuit to limit inrush current when
power is applied. If the power supply voltage is applied through the switching of con-
tacts, damage to the contacts or contact welding may occur.

Use a power supply that limits the peak output current to a value below the con-
tact switching limit.

Switch the power input to the power supply instead of the power supply’s output.
The power and input connector is a standard five pin A-coded M12 connector. The MS-31 connector that is
available from AMCI is IP67 rated when properly installed. The CNPL-2M and CNPL-5M cables are also
IP67 rated when properly installed.
1.6.1 MS-31 Connector
The MS-31 Connector accepts 18 AWG wire on all of its contacts and a cable diameter of 6.00 to 8.00 mm
(0.236" to 0.315"). AMCI strongly suggests using 18 AWG wire for the power connections.
1.6.2 CNPL-2M and CMPL-5M Cables
The CNPL cables are made with 22 AWG wire. They are rated to 4 amps at 40°C. Based on the attached
power supply and expected ambient temperatures, verify that these cable satisfy the requirements of the elec-
trical code enforced in your jurisdiction before use. If these cables do not satisfy these requirements in your
application, an MS-31 connector and appropriately sized cable can be used.
1.6.3 Extending Power Leads
AMCI strongly suggests using 18 AWG or larger wire when the power leads to the SMD23E2 or SMD24E2
must be extended. This is to minimize power loss in the cable.
1.6.4 Main Power Wiring Only
Figure T1.4 below shows how to wire power to the SMD23E2 and SMD24E2 units when only powering the
DCPower
MAIN
connection. Colors in parentheses are the appropriate wire colors for the CNPL-2M and
CNPL-5M cables.
Figure T1.4 SMD23E2 and SMD24E2 Main Power Wiring
+24 Vdc to +48 Vdc
Power Supply
POWER & INPUTS
Pin 1: DCPower (BRN)
MAIN
Pin 5: DCPower
AUX
Pin 2: Input 1
Pin 3: DC Common (BLU)
Pin 4: Input 2