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Dold LH5946.48/61 20-400mV UH=DC24V 0,2-6s Standstill monitor No. of relay outputs: 5 No. of digital inputs: 3
Product type
Standstill monitor
No. of relay outputs
5
Operating voltage
24 V DC
Type
LH5946.48/61 20-400mV UH=DC24V 0,2-6s
Probe inputs
2 redundante Messkanäle (L2 gegen L1 und L3 gegen L1); Aderbrucherkennung im Messkreis; Eingang (L1 - L2 - L3) Mess-/Motorspannung: max. AC 690 V; Eingangswiderstände: 500 kΩ; Ansprechwert Uan: 20 mV ... 400 mV. einstellbar oder 0.2 ... 4 V. einstellbar
Datasheet (PDF)
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Conrad ElectronicTerms & Conditions
Highlights & Details
- Sensorless and safe
- Quick reaction time
- Easy retrofitting, because sensorless
- Can be combined with safety guard SAFEMASTER STS
Technical specifications
- INPUT (L1 - L2 - L3)
- Measurement/motor voltage: Max. AC 690 V.
- Input resistance 500 kΩ
- Response value Uat: 20 mV ... 400 mV, adjustable or 0.2 ... 4 V, adjustable
- Hysteresis (for motor run detection): 100%
- Switch-off delay of the output contacts when motor run detection is < 100 ms
- Downtime ts: 0.2 ... 6 s can be set
- AUXILIARY VOLTAGE UH A1 - A2): 115 V AC, 230 V AC, 400 V AC, 24 V DC
- Recommended fuse: 2 A.
- Voltage range AC: 0.8 ... 1.1 UN
- DC: 0.9 ... 1.2 UN
- Nominal consumption 5 VA, 3 W
- Nominal frequency (AC): 50 / 60 Hz
- Frequency range (AC): 45 ... 65 Hz
- Max. Remaining ripple (DC): 10%
- On delay of the output relays when the auxiliary voltage is applied (stationary motor): 0.4 ... 0.8 s + set ts.
- Contact assembly (safety contacts): 3 NO contacts, 1 NC contact
- The normally open contacts 23-24, 33-34 and 43-44 can be used for safety shutdowns.
- The NC contact 11-12 can only be used as a signaling contact!
- Contact type: Relay, positively driven
- Nominal switching voltage 250 V AC
- Thermal current Ith: 5 A (up to 40°C)
- Quadratic total current: See derating curve switching capacity
- ACCORDING TO AC 15 CLOSER: 3 A / AC 230 V IEC/EN 60 947-5-1
- OPENER 1 A / AC 230 V IEC/EN 60 947-5-1
- ACCORDING TO DC 13 CLOSER: 1 A / DC 24 V IEC/EN 60 947-5-1
- NC CONTACT 1 A / DC 24 V IEC/EN 60 947-5-1
- In accordance with DC 13 closer: 4 A / 24 V at 0.1 Hz IEC/EN 60 947-5-1
- NC contact 4 A / 24 V at 0.1 Hz IEC/EN 60 947-5-1
- Electrical life at 5 A, 230 V AC cos ϕ = 1: ≥ 2 x 105 switching cycles
- Protection of the safety contacts: Max. safety fuse 4 A GG / GL
- Automatic circuit breaker C6A maximum switching frequency 1200 / h.
- Mechanical life: ≥ 50 x 106 operations
- Semiconductor signaling outputs: 100 mA DC 24 V, positive switching, electrically isolated; supply via A3+ / A4; "ON" for enable, "ERR" for error
- Normally open signal contact: 3 A AC 250 V (closed when enabled)
- Type
LH5946.48/61 20-400mV UH=DC24V 0,2-6s
- Product type
Standstill monitor
- No. of relay outputs
5
- Probe inputs
2 redundante Messkanäle (L2 gegen L1 und L3 gegen L1); Aderbrucherkennung im Messkreis; Eingang (L1 - L2 - L3) Mess-/Motorspannung: max. AC 690 V; Eingangswiderstände: 500 kΩ; Ansprechwert Uan: 20 mV ... 400 mV. einstellbar oder 0.2 ... 4 V. einstellbar
- Operating voltage
24 V DC
- Dim
(W x H) 45 mm x 90 mm
- No. of digital inputs
3
- Mounting depth
121 mm
- Weight
400 g
- Width
45 mm
- Height
90 mm
- UKCA
yes
Documents & Downloads
Datasheet
Datasheet 2359282 Dold LH5946.48/61 20-400mV UH=DC24V 0,2-6s Standstill monitor No. of relay outputs: 5 No. of digital inputs: 3
User & Safety Instructions
User & Safety Instructions 2359282 Dold LH5946.48/61 20-400mV UH=DC24V 0,2-6s Standstill monitor No. of relay outputs: 5 No. of digital inputs: 3
Description
Safe standstill detection for 3- and 1-phase electric motors, e.g. for the release of safety door releases on machine tools or for the activation of holding brakes.
The standstill monitor LH 5946 is suitable for detecting the standstill of all electric motors that generate a voltage caused by retentivity when they are run out. The LH 5946 measures this voltage induced by residual magnetization at the winding terminals. For this purpose, 2 redundant measuring channels (L2 against L1 and L3 against L1) are used. If the induction voltage on both channels goes against 0 simultaneously, this means that the motor stops and the output relay is activated. In order to be able to adapt the device to various motors and applications,the voltage threshold U below which the LH 5946 detects the standstill can be set. The time for which U must be undershot is also adjustable so that the standstill is finally detected and the output circuit is enabled (standstill time ts).
In addition, the device detects wire breaks at the measuring inputs L1 / L2 / L3. If a wire break is detected, the output relay goes to the safe position (as with the engine running). This status is saved and can be deleted by jumpers of terminals X3 - X2. In addition, the measuring signals of both channels are constantly compared. If the signals are different for longer than approx. 2.5 s, the simultaneity error is triggered. This error is reset if both channels receive sufficient signal voltages at the same time.
Terminals X1-X2 represent a feedback circuit for monitoring
Externally connected protection is available for contact amplification (NC contact). If the feedback circuit is not required, the must be
Terminals X1 - X2 are bridged, otherwise an error message will occur.
·
- Performance level (PL) e and category 4 according to EN ISO 13849-1
- SIL CLAIM LIMIT (SIL CL) 3 · according to IEC/EN 62061
- Safety Integrity Level (SIL) 3 · according to IEC/EN 61508, IEC/EN 61511 and EN 61800-5-2
· Safe standstill monitoring of 3- and 1-phase motors
· No external initiators required
· Independant of direction of rotation
· Wire break detection in the measuring circuit
· positively driven safety output contacts: 3 NO contacts, 1 NC contact for 250 V AC
· 2 semiconductor signal outputs
· 1 signaling output (NO contact)
· adjustable voltage threshold
· adjustable standstill time
· LED displays for motor standstill, wire break and operating voltage
· suitable for use with frequency converters
· 45 mm width
This text is machine translated.
The standstill monitor LH 5946 is suitable for detecting the standstill of all electric motors that generate a voltage caused by retentivity when they are run out. The LH 5946 measures this voltage induced by residual magnetization at the winding terminals. For this purpose, 2 redundant measuring channels (L2 against L1 and L3 against L1) are used. If the induction voltage on both channels goes against 0 simultaneously, this means that the motor stops and the output relay is activated. In order to be able to adapt the device to various motors and applications,the voltage threshold U below which the LH 5946 detects the standstill can be set. The time for which U must be undershot is also adjustable so that the standstill is finally detected and the output circuit is enabled (standstill time ts).
In addition, the device detects wire breaks at the measuring inputs L1 / L2 / L3. If a wire break is detected, the output relay goes to the safe position (as with the engine running). This status is saved and can be deleted by jumpers of terminals X3 - X2. In addition, the measuring signals of both channels are constantly compared. If the signals are different for longer than approx. 2.5 s, the simultaneity error is triggered. This error is reset if both channels receive sufficient signal voltages at the same time.
Terminals X1-X2 represent a feedback circuit for monitoring
Externally connected protection is available for contact amplification (NC contact). If the feedback circuit is not required, the must be
Terminals X1 - X2 are bridged, otherwise an error message will occur.
·
- Performance level (PL) e and category 4 according to EN ISO 13849-1
- SIL CLAIM LIMIT (SIL CL) 3 · according to IEC/EN 62061
- Safety Integrity Level (SIL) 3 · according to IEC/EN 61508, IEC/EN 61511 and EN 61800-5-2
· Safe standstill monitoring of 3- and 1-phase motors
· No external initiators required
· Independant of direction of rotation
· Wire break detection in the measuring circuit
· positively driven safety output contacts: 3 NO contacts, 1 NC contact for 250 V AC
· 2 semiconductor signal outputs
· 1 signaling output (NO contact)
· adjustable voltage threshold
· adjustable standstill time
· LED displays for motor standstill, wire break and operating voltage
· suitable for use with frequency converters
· 45 mm width
This text is machine translated.