Centroid 13126, Install Manual

Page: 33 / 86

5.2 E
LECTRICALLY
C
ONFIGURING
I
NPUTS ON THE
O
AK
B
OARD
The inputs of the Oak Board can be configured for either 5, 12, or 24 volts DC. The input voltage is changed by changing the
resistance of the SIP (single inline package) resistor.
By default the Oak Board is supplied with SIPs for 24VDC installed. If you are using a voltage other than 24VDC, the SIPs need to
be changed.
Turn off all power to the board when changing the SIPs.
The voltage of your input devices determine which SIP to use, use the chart below. The last
three numbers of the manufacturers part number, shown in Figure 5.2.1, determine the
resistance. Of the last three numbers, the first two digits signify the value of the resistance. The
last digit signifies the number of zeros after the value.
For example, if the manufacturers part number is “4308R-102 LF – 222”, the values 222 define
the resistance. The resistance is 22 plus two zeros, so the final value is 2200 Ohms. The chart
next to Figure 5.2.1 defines which resistors are needed for which voltages.
Centroid
Part
Number
Voltage
Level
Last 3 numbers
of manuf. part
number
SIP Resistance
Value
3950 5 VDC 471 470 Ω
4152 12 VDC 102 1 KΩ
1548 24 VDC
(default)
222 2.2 KΩ
Looking closely at the Oak Board, the silkscreen is labeled SIP1 , SIP2 , SIP3 , and SIP4 , see Figure 5.2.2.
Each SIP controls a group of I/O as demonstrated by the table below. Change the SIPs Corresponding to which inputs are using a
different voltage.
Input Group SIP Number
Inputs 1-4 4
Inputs 5-8 3
Inputs 9-12 2
Inputs 13-16 1
Page 33 of 86 Chapter 5 Electrical Cabinet Wiring
Figure 5.2.1
Reading SIPs
Figure 5.2.2
Location of SIPs