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5.3.6.1 BPL010-502 - PNP outputs
An external supply (typically 24 VDC) is used to power the UDN2982 output devices, as
shown in Figure 37. When an output is activated, current is sourced from the user supply
through the UDN2982, which can source up to 75 mA per output (all outputs on, 100% duty
cycle). Connect OUT COM to the user supply GND. This will connect internal transient
suppression diodes on all outputs. If an output is used to drive a relay, a suitably rated diode
must be fitted across the relay coil, observing the correct polarity (see Figure 39). The use of
shielded cable is recommended.
NextMove ES
OUTX(0)
Control
circuitry
Figure 37 - Digital output circuit (DOUT0-7) with 'PNP' current sourcing module - DOUT0 shown
5.3.6.2 BPL010-503 - NPN outputs
An external supply (typically 24 VDC) is used to power the UDN2803 output devices and drive
the load, as shown in Figure 38. When an output is activated it is connected to USR COM
through the ULN2803, which can sink up to 150 mA per output (all outputs on, 100% duty
cycle). Connect OUT COM to the user supply 24 V. This will connect internal transient
suppression diodes on all outputs. If an output is used to drive a relay, a suitably rated diode
must be fitted across the relay coil, observing the correct polarity (see Figure 39). The use of
shielded cable is recommended.
NextMove ES
OUTX(0)
Control
circuitry
Figure 38 - Digital output circuit (DOUT0-7) with 'NPN' current sinking module - DOUT0 shown
Servo Systems Co. • 115 Main Road • P.O. Box 97 • Montville, NJ,
MN1928
07045-0097 • (973) 335-1007 • Toll Free: (800) 922-1103
Backplane & opto-isolator card
+5 V
2k2
96
pin
connector
TLP521-4
Backplane & opto-isolator card
+5 V
2k2
96
pin
connector
TLP521-4
Fax: (973) 335-1661 • www.servosystems.com
'X6'
6
USR V+
'X11'
UDN2982
10
USR COM
1
DOUT0
9
OUT COM
'X6'
6
USR V+
ULN2803
'X11'
1
DOUT0
9
OUT COM
10
USR COM
www.baldormotion.com
User
supply
24 V
Output
User
Load
supply
GND
User
supply
24 V
Output
Load
User
supply
GND
Backplanes 5-27
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