LEYBOLD ECODRY plus 25 - Page 27

Enable control voltage: low (closed) 0 to 0.8 V d.c. (I
OUT
= 0.3 mA nominal)
Disable control voltage: high (open) 4 to 26.4 V d.c. (internal pull-up to a Thevenin equivalent circuit:
2.5 V and 10.3 kOhms nominal)
Analogue speed input 0 to 10 V d.c. directly proportional to the motor speed example 0
V = 0 Hz, 10 V = 250 Hz
Voltage accuracy ± 5% full scale
NORMAL status output:
▪ Type
▪ < Normal speed (default 80%)
▪ > Normal speed
▪ Maximum current rating
▪ Maximum voltage rating
▪ Open collector transistor plus pull up resistor
▪ OFF (4.7 k pull up + diode to 12 V d.c.)
▪ ON (< 0.8 V d.c. sinking 10 mA)
▪ 10 mA
▪ 28.8 V d.c.
Analogue 10 V reference + 10 V d.c. analogue voltage reference unipolar output with diode
protection
Voltage accuracy output ± 2% full scale
Current ≤ 5 mA for specied accuracy
Table 12
Logic interface pins
Pin
number
Signal Polarity Use
1 Rotor Speed -
Analogue Output
0 to + 10 V d.c.
(2 mA)
Analogue output signal, proportional to
mechanical rotational frequency (+ 10 V = 100%
full speed)
2 STANDBY enable -
Control Input
Active low, digital
input
Connect to pin 4 (0 V) to enable STANDBY
speed.
3 + 10 V Analogue Reference
- Control Output
+ 10 V d.c.
(5 mA)
+ 10 V analogue output reference voltage,
unipolar output, diode protected.
4 0 V Control Reference - 0V reference for all control and status signals
listed within this table.
5 NORMAL -
Status Output
- Logic low, when the pump rotational speed is at
normal speed or above.
6 Analogue Speed -
Control Input
0 to + 10 V d.c. 0 - 10 V analogue input:
0 V = 0% speed, + 10 V = 100% speed
7 Analogue Common - 0 V Reference signal for speed control
8 0 V Control reference - 0 V reference for all control and status signals
listed within this table.
9 START/STOP -
Control Input
- Connect to pin 4 (0 V) to start the pumps.
Housing - Pump Housing PE
27
300902516_002 - 10/2020 - © Leybold
Operation