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4. Terminal Assignments and Connections
We recommend connecting the Minus wire of the power supply to earth potential.
Please observe that, under poor earthing and grounding conditions, multiple earth connections
of screens and GND terminals may cause severe problems. In such cases it may be better to
have only one central earthing point for the whole system.
GND terminals 4, 6 and 12 are connected internally.
Under nominal conditions the current consumption of the unit is approx. 70 mA (aux. output
unloaded, see section
output will increase the consumption accordingly.
Current output 0-20mA / 4-20mA
TTL: input /A HTL: n.c.
TTL: input A HTL: input A
4.1. Example for use of TTL encoders
If applicable, the encoder can be supplied from the FU252 converter. Where the encoder is
already supplied from a remote source, we recommend fully differential operation, with no
GND connection between encoder and converter (see figures a. and b.)
Fu252_02g_oi_e.doc / Apr-16
www.hohner-elektrotechnik.de
13
"Technical Specifications"). Lower input voltage and load of the aux.
FU 252
Control
Aux. output 5.5V
(max. 250 mA)
GND ( - )
TTL encoder
+
A
A
B
B
-
TTL encoder
+
A
A
B
B
-
Voltage output +/-10V
TTL: input /B HTL: n.c.
TTL: input B HTL: input B
GND ( - ) for analogue signals
Supply +18...30 VDC
(typ. 70 mA)
GND ( - )
FU 252
11 (+5.5V)
A
8
A
9
B
2
B
3
12 (GND)
Screen
FU 252
11 (+5.5V)
A
8
A
9
B
2
B
3
12 (GND)
Screen
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