RE 30 255-B/05.00
Analog Command Value Card VT-SWKA-1
Product Description and Commissioning Instructions
Published by Mannesmann Rexroth AG
Rexroth Hydraulics
D-97813 Lohr am Main
Jahnstraße 3-5 • D-97816 Lohr am Main
Telephone 0 93 52/18-0
Telefax 0 93 52/18-23 58
Telex eMail
6 89 418-0 [email protected]
Internet www.rexroth.com
Issue number RE 30 255-B/05.00
Copying and translation, even of extracts, only with prior permission of the publisher.
Subject to revision.
Product description and commissioning instructions VT-SWKA-1
Table of contents
Table of contents
1. General
1.1 Features
1.2 Technical data
2. Block circuit diagram
3. Functional description / commissioning notes
3.1 General
3.2 Command value preselection
3.3 Current input
3.4 Command value call-ups
3.5 External command value potentiometer
3.6 Command value inversion
3.7 Enable function
3.8 Ramp generator
3.9 External ramp time adjustment
3.10 Ramp status signal
3.11 Ramp time selection logic
3.12 Characteristic curve generator
3.13 Amplitude limiter
3.14 Fault recognition
3.15 Measuring points
4. Indicator / adjustment elements
5. Adjustment recommendation
6. Pin assignment
7. Engineering / maintenance notes / supplem. information
12
13
13
10
10
9
9
8
8
7
8
10
7
7
7
7
7
7
11
4
5
6
RE 30 255-B/05.00
3
Product description and commissioning instructions VT-SWKA-1
1. General
1. General
1.1 Features
– Analog command value card (without power part) for controlling valves with integral electronics
→ For controlling valves without integral electronics, a suitable additional amplifier is required.
– Suitable for generating, combining and normalizing command value signals
– Configuration and parameterization of the command value card by means of potentiometers
– Command value inputs:
• Differential input ± 10 V
• 4 callable command value inputs ± 10 V
• Current input 4 to 20 mA (standard 0 to 100 %; can be changed over ± 100 %)
– Control variable output:
• Voltage ± 10 V
• Current 4 to 20 mA (standard 0 to 100 %; can be changed over ± 100 %)
– Inversion of internal command value signal using 24V input or jumper
– Ramp time selection by quadrant recognition (24V input) or ramp time call-ups (24V inputs)
– Ramp time range can be changed over by means of jumpers
– Characteristic curve correction by means of separately adjustable step-change heights and maximum values
– Enable input
– Output signal “ramp ready“ as auxiliary process variable
– Output signal “ready for operation“
– Switchable measuring socket
– Reverse voltage protection for voltage supply
Suitable card holders:
– 19“ rack types VT 19101, VT 19102, VT 19103 and VT 19110 (see RE 29 768)
– Closed card holder VT 12302 (see RE 30 103) with blind plate insert 4TE/3HE
(material no. 00021004)
– Open card holder VT 3002-2X/48 (see RE 29 928)
For control cabinet installation only!
Power supply units:
– Type VT-NE30-1X, see RE 29 929
Compact power supply unit 115/230 VAC → 24 VDC, 70 VA
– Type VT-NE31-1X, see RE 29 929
Compact power supply unit 115/230 VAC → 24 VDC, 7 VA
– Type VT-NE32-1X, see RE 29 929
Compact power supply unit 115/230 VAC → 24 VDC, 60 VA (smoothed) and
24 VDC, 25 VA (regulated)
4 RE 30 255-B/05.00
Product description and commissioning instructions VT-SWKA-1
1. General
1.2 Technical data
For applications outside these parameters, please consult us!
Operating voltage
Operating range: – Upper limit value
– Lower limit value
Power requirement
Current consumption
Fuse
Inputs:
– Analog
• command values 1 to 4 (potentiometer inputs)
• command value 5 (differential input)
• command value 6 (current input)
• ramp time external
– Digital
• command value call-ups
U
B
U
B
(t) max
U
B
(t) min
U
U
U
I e e e e
24 VDC + 40 % – 20 %
35 V
18 V
P
S
< 7 VA
I < 0.3 A
Thermal overload protection; auto-activating when triggered
0 to ± 10 V; R e
0 to ± 10 V; R e
0 to +10 V; R e
= 100 k
> 50 k
4 to 20 mA; load R
B
Ω
Ω (reference is M0)
= 100 Ω (zero point can be changed over)
= 10 k Ω (internally raised to +15 V; reference is M0)
• ramp call-ups
• quadrant recognition
• command value inversion
• enable
U 8.5 V to U
U
U 8.5 V to U
U
U 8.5 V to U
U
U 8.5 V to U
U
U
U
0 to 6.5 V
0 to 6.5 V
0 to 6.5 V
0 to 6.5 V
8.5 V to U
0 to 6.5 V
B
B
B
B
B
→ call-up activated
→ no call-up
→ call-up activated
→ no call-up
→ ON
→ OFF
→ ON
→ OFF
→ ON
→ OFF
Adjustment ranges:
– Zero point adjustment (potentiometer “Zw“)
– Command values (potentiometers “w1“ to “w4“)
– Ramp times (potentiometers “t1“ to “t5“)
– Step-change height (potentiometers “S+“ and “S–“)
– Amplitude attenuator (potentiometers “G+“ and “G–“)
± 30 %
0 to 110 %
20 ms to 5 s (can be changed over using J3)
0 % to 50 % (step-change height reached at ca. 2 % command value injection)
0 % to 110 % (valid when step-change height is set to 0 %)
Outputs:
– Analog signals
• control variable voltage current
• measuring signal
U ± 10 V ± 2 %; I max
= 2 mA
U
I 4 mA to 20 mA ± 2 %; R
B
± 10 V ± 2 %; I max max
= 2 mA
= 500 Ω (zero point can be changed over)
– Digital signals
• ramp ready
• ready for operation
– Regulated voltages
U
U
> 16 V; 50 mA
< 1 V; R i
→ ready
= 10 k Ω → ramp active
U > 16 V; 50 mA (in the event of a fault: U < 1 V; R
U ± 10 V ± 2 %; 25 mA i
= 10 k Ω )
– Measuring sockets
• measur. signal “v“ (dep. on position of measur. point selector switch) U ± 10 V ± 2 %; I max
= 2 mA
Type of connection 48-pin blade connector, DIN 41 612, form F
Card dimensions Euro-card 100 x 160 mm, DIN 41 494
Front panel dimensions: – Height
Permissible operating temperature range
Storage temperature range
Weight
– Width soldering side
– Width component side
3 HE (128.4 mm)
1 TE (5.08 mm)
3 TE
ϑ 0 to + 50 ° C
ϑ – 25 ° C to + 85 ° C m 0.15 kg
Note:
For details regarding environment simulation tests in the fields of EMC (electromagnetic compatibility), climate and mechanical stress, see RE 30 255-U (declaration on environmental compatibilty).
RE 30 255-B/05.00
5
Quadrant operation
1
Ramp call-ups
2
3
4 b20 d10 d12 d14 d16
+15 V A t1
Ramp time external d24 d28
Com. value 5:
0 to ± 10 V
Com. value 6:
4 to 20 mA
Com. value 4
Com. value 3
Com. value 2
Com. value 1
Com. value call-ups 3
4
1
2
+
– b14 b16
+ b22
– b24 b8 b6 b4 b2 d2 d4 d6 d8 w4
3 w3
4 u
2 u i
J5 u w2
3 w1
2
Inversion
Enable b10 d18
UL
Operating voltage
24 V z30
0 V z32
ϑ + t2
1
L0
B
4 t3
100 µ F
10
C t4
6
∑
Zw
5
5
D t5
6
7 v
E
J1
– 1
8
4Q
UP/DOWN max t1
DC
F
J2, J3 t3
1 t2
DC
9 t4 t
+/–
7
+15 V
+7,5 V
M0
–5 V
–7,5 V
–15 V
Gw+
S+
J4
UL
Gw–
S–
11
C
D
EF
9A 678
0
45
12
15
12
∑
Measuring points 1)
0 12 3 4 5 6 7 8 9A C D E F
13
14
1) Measuring points 8 and 9 are not assigned.
J7 d26
Ramp ready d30
Contr. variable
0 to ± 10 V
0 u
J6 i d32 Control variable
4 to 20 mA
UL d22
“Ready for operation“ b32
+ 10 V/25 mA b30
– 10 V/25 mA v b26
Measuring signal b28
M0 z20
System ground
1 Power supply unit
2 Differential amplifier
3 Current input
4 Command value selection logic
5 Zero point adjustment
6 Command value summation
7 Command value inversion
8 Enable function
9 Ramp generator
10 Ramp time selection logic
11 Ramp status function
12 Characteristic curve generator
13 Amplitude limiter
14 Fault recognition
15 Measuring point changeover
For explanations regarding the jumpers as well as the position and assignment of indicator and adjustment elements, see page 11
Product description and commissioning instructions VT-SWKA-1
3. Functional description / commissioning notes
3. Functional description / commissioning notes
[ ] = Reference to the block circuit diagram
3.1 General
The command value card is designed as printed circuit board in Euro-format 100 x 160 mm and is suitable for installation in a rack. A power supply unit [1] provides the internally required positive and negative supply voltages. As soon as the power supply unit is in operation and no error is present, the green LED on the front panel lights up and the “ready for operation” signal is set.
3.2 Command value preselection
The internal command value signal is generated from the sum (command value summation
[6]) of the external command value signal applied to differential input [2] and to current input [3], called-up signal [4] and zero point offset [5] (zero point potentiometer "Zw”).
3.3 Current input [3]
There is no changeover between current and voltage input. Both inputs are permanently available (see terminal allocation). The input signals are internally normalized and added.
The zero point and the range of values of the current input can be changed over by means of jumper J5.
3.4 Command value call-ups [4]
Four command value signals, “w1“ to “w4“, can be called up. External command value voltages (command values 1 to 4) are preselected either directly via the regulated voltage inputs + 10 V and – 10 V or via external potentiometers. If the command value inputs are connected directly to the regulated voltages, the command values are adjusted by means of potentiometers “w1“ to “w4“. If external potentiometers are used, the internal potentiometers act as attenuators or limiters.
Only one call-up is possible at a time. If several call-ups are selected simultaneously, call-up
“1” has lowest priority, call-up “4” highest priority.
A yellow LED on the front panel indicates, which call-up is active.
3.5 External command value potentiometer
R
5 k Ω < R < 20 k Ω b2, b4, b6 or b8 b32
(+10V) b28
(0V) b30
(–10V) b28
(0V) b32
(+10V) b30
(–10V)
Range of command values
0 to
+100%
0 to
–100%
–100% to
+100%
3.6 Command value inversion [7]
The command value that is generated internally from input signals, command value call-ups and zero point offset signals can be inverted by means of an external signal or jumper J1. An
LED (“– 1“) on the front panel signals whether an external inversion signal is applied.
3.7 Enable function [8]
The enable function cuts the enable signal of the ramp generator in or out. When the enable is cut in or out, the control variable changes at any command value according to the set ramp time. This prevents a controlled valve from opening or closing suddenly. If an error signal is present, the input signal of the ramp generator is also set to 0 %. An LED on the front panel signals that an enable signal is applied.
RE 30 255-B/05.00
7
Product description and commissioning instructions VT-SWKA-1
3. Functional description / commissioning notes
3.8 Ramp generator [9]
The ramp generator limits the increase of the control variable. Downstream step-functions and amplitude attenuators do not shorten or extend the ramp time.
Jumper J2 can be used to set the ramp time to minimum (< 2 ms) (ramp off).
The minimum/maximum ramp time can be changed between 20 ms/5 s or 0.2 s/50 s by means of jumper J3.
5 different ramp times can be set and activated. The ramp times can be pre-set or verified with the help of test socket “v”.
The following is valid (with factory setting of jumper J3 → connection 2-3): t =
100
U test socket "v"
(in V)
(in ms)
J3 → connection 2-3 1)
J3 → connection 1-2
1) factory setting
U test socket "v"
(in V) 5 3 2 1 0.5
0.3
0.2
0.1
0.05
0.03
0.02
t (in ms; ± 20 %) 20 33 50 100 200 333 500 1000 2000 3333 5000 t (in s; ± 20 %) 0.2
0.33
0,50 1 2 3.33
5 10 20 33 50
3.9 External ramp time adjustment
The internally set ramp time can be extended by means of an external potentiometer. The setting can be verified with the help of the measuring socket. In the case of a cable break, the internal presetting will be validated automatically.
The adjustment range depends on " R ".
+ 15 V l r
R d24 d28
The following is valid (with factory setting of jumper J3 → connection 2-3):
Adjustment range 2)
R Minimum ramp time Maximum ramp time
Potentiometer to left-hand stop Potentiometer angle of rotation = 95 %
1 k Ω
0,5 k Ω
0,1 k Ω
80 ms
150 ms
800 ms
1 s
2 s
10 s
2) The minimum ramp time can only be achieved, if the internally set ramp time is less, i.e.
the relevant potentiometer is turned to the left-hand stop.
3.10 Ramp status signal [11]
The status signal “ramp ready“ indicates that the control variable has reached the requested final value. This signal (24V output) facilitates the synchronization of higher-level sequence controls with the valve function or the controlled hydraulic function.
8 RE 30 255-B/05.00
Product description and commissioning instructions VT-SWKA-1
3. Functional description / commissioning notes
3.11 Ramp time selection logic [10] a) Operating mode "4-quadrant operation"
When 4-quadrant operation is activated (24V signal “4Q”), the electronics automatically recognizes the command value polarity and the direction of change of the command value and assigns a ramp time to the current signal status. Depending on these signal states, one of the 4 ramp times is selected.
Ramp up, positive → Ramp potentiometer “t1”
Ramp down, positive → Ramp potentiometer “t2”
Ramp up, negative → Ramp potentiometer “t3”
Ramp down, negative → Ramp potentiometer “t4”
4-quadrant operation has a higher priority than all ramp time call-ups. As long as a signal changes, the LED (on the front panel, directly next to the associated potentiometer) assigned to the current ramp time lights up.
Note: In the case of very short ramp times, the LEDs' lighting up can no longer be noticed.
LED “4Q” on the front panel is on when quadrant recognition is active.
b) Ramp time call-ups
When operating mode "4-quadrant operation" is deactivated, 4 ramp times can be called up using an optional call-up signal (24V input). Only 1 call-up is possible at a time. If several call-ups are activated at the same time, call-up “1” has the lowest priority and call-up “4” has highest priority. Each called-up ramp time is signaled by a yellow LED (on the front panel, directly next to the associated potentiometer).
c) 5th ramp time
If neither quadrant recognition nor a call-up is activated, ramp time "t5" is always valid.
3.12 Characteristic curve generator [12]
The adjustable characteristic curve generator can be used to adjust step-change heights and maximum values separately for positive and negative signals according to the hydraulic requirements. The actual characteristic curve shape through the zero point is not step-like, but linear.
The step-change height can be adjusted by means of potentiometers "S+" and "S–".
Jumper J4 can be used to activate the step function. For this, the connection 2-3 of jumper J4 must be plugged (factory setting: connection 1-2 → step function OFF). To prevent a residual step-change (< 1 %) when the step function is deactivated, the potentiometers “S+” and S–“ must be turned to the left-hand stop and the connection 1-2 of jumper J4 must be plugged.
The maximum command value can be adjusted by means of potentiometers “Gw+” and
“Gw–”. The adjustment range is between 0 % and 110 %.
3.13 Amplitude limiter [13]
The control variables (current output and voltage output) are limited to approx. ± 110 % of the nominal range.
G+
– 100 %
S+
– 2 %
+ 2 % + 100 %
S–
G–
← Command value preselection →
RE 30 255-B/05.00
9
Product description and commissioning instructions VT-SWKA-1
3. Functional description / commissioning notes
3.14 Fault recognition [14]
This features monitors internal operating voltages, voltage outputs and, if jumper J7 (1-2) is plugged, the current output for cable break. When no fault is present, the green “ready for operation” LED lights up and the output “ready for operation” is set to 24 V (operating voltage).
3.15 Measuring points [15]
A measuring socket is provided on the front panel to allow the verification of the settings of command value call-ups, ramp times and further, internal signals. The measuring points can be selected using the measuring point selector switch that is also provided on the front panel. The signal of the measuring socket is also connected to the blade connector (b26).
Switch position
E
F
C
D
A
B
8
9
6
7
4
5
2
3
0
1
Signal
Internal command value
Command value call-up 1
Command value call-up 2
Command value call-up 3
Command value call-up 4
Zero point offset “Zw”
Summated signal of command values
Ramp generator output free free
Ramp time “t1”
Ramp time “t2”
Ramp time “t3”
Ramp time “t4”
Ramp time “t5”
Current ramp time “t”
Measuring signal at "v"
± 10 V Ⳏ 100 %
± 10 V Ⳏ 100 %
± 10 V Ⳏ 100 %
± 10 V Ⳏ 100 %
± 10 V Ⳏ 100 %
± 3 V Ⳏ ± 30 %
± 10 V Ⳏ 100 %
± 10 V Ⳏ 100 %
10 mV to 10 V
10 mV to 10 V
10 mV to 10 V
10 mV to 10 V
10 mV to 10 V
10 mV to 10 V
10 RE 30 255-B/05.00
Product description and commissioning instructions VT-SWKA-1
4. Indicator / adjustment elements
4. Indicator / adjustment elements
J5 → current input 1-2 2-3
0 % Ⳏ 4 mA
0 % Ⳏ 12 mA
•
–
–
•
J1 → inversion inverting not inverting
1-2 2-3
• –
– •
J4 → step function 1-2 2-3
OFF
ON
•
–
–
•
Do not change!
(Ramp time symmetry)
No function!
(Reserve)
-1 4Q T
4
12
J5
1
D
EF
012
3
AB 89
67 t3 t 4 t5
Zw w1 w2 w3 w4 t1 t2 v0
– vF
1 1
J3 J2
1
J1
G+
S+
G–
S–
J4
1
J8
1
12
4
J6 J7
1
SWKA
v
Do not change!
(Internal reference voltage)
LED lamps:
Readiness for operation (green)
Enable (yellow)
–1 External inversion
Measuring point selector switch
Measuring sockets: v Measuring signal
⊥ Measurement zero
4Q Quadrant recognition
T Reserved
Potentiometers (some with LED lamp):
Zw Zero point adjustment w1 Command value 1 w2 Command value 2 w3 Command value 3 w4 Command value 4 t1 Ramp time 1 t2 Ramp time 2 t3 Ramp time 3 t4 Ramp time 4 t5 Ramp time 5
Cannot be adjusted on the front panel:
G+ Amplitude attenuator for positive command values
G– Amplitude attenuator for negative command values
S+ Step-change height for positive direction
S– Step-change height for negative direction
•
–
J6 → current output 1-2 2-3
0 % Ⳏ 4 mA
0 % Ⳏ 12 mA
J7 → cable break
ON
OFF monitor
•
–
1-2
–
•
2-3
• –
– •
J2 → ramp function 1-2 2-3
OFF
ON
J3 → ramp time
Ten-fold
Single
… Connection made
•
–
1-2
–
•
2-3
• –
– •
… Connection broken
… Factory setting of jumpers
If the sealed potentiometers are misadjusted, the warranty will become void !
RE 30 255-B/05.00
11
Product description and commissioning instructions VT-SWKA-1
5. Adjustment recommendation
5. Adjustment recommendation
The system-specific circuit must be provided.
Signal Adjustment
Command value call-up – Select the potentiometer to be adjusted using the measuring point selector switch
– Adjust the command value call-up and check it on measuring socket "v"
Command value zero point – Do not activate a command value call-up!
– Set external command value preselections to zero
– Turn measuring point selector switch to "6"
– Set the measured value to zero using zero point potentiometer "Zw"
Ramp times – Select the potentiometer to be adjusted using the measuring point selector switch
– Adjust the ramp time according to the formula or table (see
"3.8 ramp generator") and check it on measuring socket "v"
External ramp potentiometer
Step-change height
Maximum values
– Do not activate a ramp time call-up!
– Turn ramp potentiometer "t5" to the left-hand stop
– Turn measuring point selector switch to "F"
– Adjust the ramp time according to the formula or table (see
"3.8 ramp generator") and check it on measuring socket "v"
– Apply enable signal
– Turn measuring point selector switch to "7"
– Adjust the measuring signal to + 0.3 V using zero point potentiometer "Zw" 1)
– Turn measuring point selector switch to "0"
– Set the required step-change height using potentiometer "S+"
– Turn measuring point selector switch to "7"
– Adjust the measuring signal to – 0.3 V using zero point potentiometer "Zw" 1)
– Turn measuring point selector switch to "0"
– Set the required step-change height using potentiometer "S–"
– Adjust the zero point
1) In the case of external command value preselection, this must result in at least + 0.3 V / – 0.3 V at measuring socket "v" (turn measuring point selector switch to "7").
Note: Before the maximum values are matched, the zero point and step-change heights must be correctly set.
– Adjust the step-change heights first; generate command value ± 100 % externally or by means of a command value call-up
– Turn measuring point selector switch to "7"
– Check measuring signal 10 V ± 0.2 V
– Adjust the required maximum control output using potentiometers "G+"/"G–"
12 RE 30 255-B/05.00
Product description and commissioning instructions VT-SWKA-1
6. Pin assignment 7. Engineering / maintenance notes / supplem. information
6. Pin assignment
Pin
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
Row d
Command call-up 1
(24V input)
Command call-up 2
(24V input)
Command call-up 3
(24V input)
Command call-up 4
(24V input)
Ramp call-up 1
(24V input)
Ramp call-up 2
(24V input)
Ramp call-up 3
(24V input)
Ramp call-up 4
(24V input)
Enable
(24V input)
Reserved
Row b
Command value 1
(Potentiometer connection ± 10 V)
Command value 2
(Potentiometer connection ± 10 V)
Command value 3
(Potentiometer connection ± 10 V)
Command value 4
(Potentiometer connection ± 10 V)
Command value inversion
(24V input)
Reserved
Command value 5 + (+ 10V )
Command value 5 – (– 10V )
Reserved
Signal "ready for operation"
(24 V, H-active, 50 mA)
Ramp external
Ramp completed
Ramp external / reference
Control output ± 10 V
4-quadrant operation
(24V input)
Command value 6 +
(4 to 20 mA)
Command value 6 –
(4 to 20 mA)
Measuring signal
Reference potential for
outputs (M0)
– 10 V / 25 mA
32 Control output 4 to 20 mA + 10 V / 25 mA
Row z
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
System ground
Reserved
Reserved
Reserved
Reserved
Operating voltage
(24 V)
L0 (0 V)
7. Engineering / maintenance notes / supplem. information
RE 30 255-B/05.00
– The command value card may only be withdrawn or plugged in when disconnected from the power supply!
– Never install cables near power cables!
– The distance to antenna cables, radio equipment and radar systems must be at least 1 m!
– Use relays with gold-plated contacts for switching command values (small voltages, small currents)!
– Only carry out measurements on the cards with instruments R i
> 100 k Ω !
– Use a screw driver with a blade width of 4 mm for adjusting potentiometers and turning the measuring point selector switch.
– Always shield command value cables; connect shield to protective earth (PE) on the card side!
– Caution: When using the differential input, both inputs must always be switched on or off simultaneously !
If the sealed potentiometers are misadjusted, the warranty will become void !
13
The specified data is for product description purposes only and may not be deemed to be guaranteed unless expressly confirmed in the contract.
All rights reserved – Subject to revision
Mannesmann Rexroth AG
Rexroth Hydraulics
D-97813 Lohr am Main
Jahnstraße 3-5
D-97816 Lohr am Main
Telefophone 0 93 52 / 18-0
Telefax 0 93 52 / 18-23 58
Telex eMail
Internet
6 89 418-0 [email protected]
www.rexroth.com
Mannesmann Rexroth Limited
Cromwell Road, St Neots,
Cambs, PE19 2ES
Tel: 0 14 80 / 22 32 56
Fax: 0 14 80 / 21 90 52 eMail: [email protected]
RE 30 255-B/05.00
