Datasheet

Dz210_01c_oi_e.doc / Nov-15 Page 8 / 14
4. Switch Settings
4.1. Setup of the Impulse Inputs
Positions 1 to 5 of switch DIL 1 are used to set levels and switching characteristics of the
impulse inputs. Most of all practical applications would require one of the following three
standard settings:
Input Signal
Setting DIL 1
RS422 or TTL symmetric
(differential signals A, /A, B und /B)
ON
ONOFF
HTL signal, asymmetric, PNP (switch to +)
(channels A and B only, no inverted signals)
ON
ONOFF
HTL signal, asymmetric, NPN (switch to -)
(channels A and B only, no inverted signals)
This setting is also suitable for NAMUR sensors
(2-wire). Observe special hint below.
ON
ONOFF
TTL signal asymmetric (single-ended)
(only A und B, no inverted signals)
ON
ONOFF
More combinations can be set with consideration of the individual function of each switch
position, according to the following table:
1
OFF: HTL level (all of the 4 input lines)
ON: TTL level (all of the 4 input lines)
2
OFF: Input B is symmetric (needs /B)
ON: Input B is asymmetric (single-ended, no /B)
3
OFF: Input A is symmetric (needs /A)
ON: Input A is asymmetric (single-ended, no /A)
4
---
ON: internal pull-up resistor towards + *)
5
---
ON: internal pull-down resistor towards GND *)
*) Positions 4 and 5 both ON = Tristate, input impedance = 10 kOhms
 At any time one of the positions 4 and 5 must be "ON".
With 4 and 5 both OFF, the unit may produce undefined operations
 Unused inputs should always be set to HTL level
 With use of Namur (2-wire) sensors, please connect the positive wire to the
corresponding input, and the negative wire to GND.
 With setting HTL and NPN all impulse inputs are tied to the positive potential
of the power supply (+24 V) via internal pull-up resistors. To avoid damage
with use of TTL encoders, it is advisable to first set the unit to TTL level prior
to connection of the encoder to the unit.