Uf251_01d_oi_e.doc / Aug-16
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3.
Terminal Assignment and Connections
Connect the power supply voltage to terminal 5 (+) and 6 (-). We recommend to tie the Minus
wire of the power supply to earth potential. Terminals 4 (AGND) and 6 (GND) are connected
internally. Depending on the power voltage level, the current consumption of the unit is
approximately 120 to 180 mA.
7
8
9
10
11
12
1
2
3
4
5
6
Analogue in +/- 20mA
UP-DOWN/UP
SET/DOWN
A (HTL)
B (HTL)
Z (HTL)
Analogue in +/- 10V
POT
M
AGND
+18...30VDC
GND
RS232/RS485
Frequency output
RS422
3.1.
Frequency Outputs
The unit provides two frequency outputs, one HTL level (A, B, Z) and one RS422 (A, /A, B, /B, Z,
/Z). The marker pulse length is ¼ pulse period and is gated by A high and B high.
The HTL output, in High state, provides a no-load voltage of approximately the supply voltage
minus 4 volts. The output is short-circuit proof up to 24 V and has an internal resistance of
approximately 600 Ohm.
The maximum output frequency of the RS422 output is 500 kHz. The HTL output should however
only be used up to approx. 100 kHz, since higher output frequencies could cause poor pulse
edge quality.
The preset frequency ranges (selectable by DIL-switch) have an accuracy of 0.15% of full scale
value and a dead band of 6.25 mV.
Accuracy and dead band can be increased by user specific limitation of the frequency ranges.
The overall frequency resolution is about 14 bits.
B
A
A
GND
N
N
B
1
2
3
4
5
9
8
6
7
RS422 Frequency Output: D-SUB 9 male
