User manual

Publication 1760-UM001A-EN-P
2-10 Installation
Connecting DC Inputs
Use input terminals I1 to I8 to connect push-button, switches, or 3 or 4-wire
proximity switches. Given the high off-state leakage current, do not use 2-wire
proximity switches.
Connecting Analog Inputs
Inputs I7 and I8 can also be used to connect analog devices ranging from 0 to 10V
dc.
Use shielded twisted pair cables to prevent interference with the analog signals. For
short cable lengths, ground the shield at both ends with a large contact area. If the
cable length exceeds 30m (98.4 ft), grounding at both ends can result in ground
loops between the two grounding points and thus to the interference of analog
Input Specification
Input Signal Voltage Range OFF signal: 0 to 5V dc
ON signal: 15V to 28.8V dc
Input Current I1 to I6: 3.3 mA at 24V dc
I7 and I8: 2.2 mA at 24V dc
ATTENTION
!
!!
!
Analog signals are more sensitive to interference than digital
signals. Consequently, more care must be taken when routing
and connecting the signal lines. Route the analog wiring:
• away from power lines, load lines and other sources of
electrical noise such as hard-contact switches, relays, and AC
motor drives
• away from sources of radiated heat
Incorrect switching states may occur if the analog wiring is not
installed correctly.
24V dc
+24 V COM I2 I3 I4 I5 I6 I7 I8I1
Inputs x 24V dc (I7,I8 0 to 10V)
+24V
0V
1A