D521系列选型

Examples:
D521.02 :  without Analog Output, 2 Alarms with SPDT contacts
D521.04 :  without Analog Output, 2 Alarms with SPDT contacts
                 + 2 with PhotoMOS contacts
D521.10 :  with 1 Analog Output, no output contacts
D521.12 : with 1 Analog Output, 2 Alarms with SPDT contacts
D521.14 : with 1 Analog Output, 2 Alarms with SPDT contacts
                + 2 with PhotoMOS contacts
D521.12-G : with 1 Analog Output, 2 Alarms with SPDT contacts,
                     field mounting enclosure with transparent cover

产品特点：有2个为继电器SPDT 接点输出；另外可选2 个电子式继电器接点输出。可独立设定每个动作值、回程差、接点失电时的开/闭状态，以及传感器断线或断电时的报警状态。
采用周期测量方法，测量小周期可设定，保证测量的精度和快速响应要求。
配置标准的RS 232 通讯接口，以便传输测量值、报警状态和故障状态，同时可选通讯线缆及通讯软件以完成功能组态。传感器断线或断电故障监控，故障状态下的报警点和模拟量的状态可编程设定。

Single Channel Speed Monitor  for Rotating Equipment   Series D521.xx
KEY FEATURES

• Single Channel Monitor with sensor monitoring and self-test function
• Frequency range 0 Hz…100 kHz
• 1 Analog Output (option)
• Bright red digital LED display
• 2 Alarm Outputs as SPDT relays (option)
• 2 Alarm Outputs as PhotoMOS relays (option)
• Universal Input, also for magnet- inductive sensors (MPUs)
• Square wave Pulse Output
• RS232 Data Interface
• Two Monitors, suitably configured with their output contacts linked together, may provide a protection system with 1oo2 or 2oo2 redundancy
• Universal Power Supply range  20…265 Vuc

BENEFITS

• Fast, precise and safe
• Maintenance-free during Lifetime, therefore minimized TCO
• Universal range of application, throughout mechanical and electrical engineering, in the chemical industry, in power plants, at test facilities
• Increased safety with 1oo2 architecture
• Maximum availability with 2oo2 architecture

Fast, precise and safe – from zero motion to highest speed 

The BRAUN Single Channel Speed Monitor Series D521 for increased safety requirements
monitors motors, pumps, feeders, gears, rollers and small turbines and provides protec-
tion against overspeed at any required value of rotational speed, including standstill.
The signal input is universally designed. It fits for BRAUN A5S… sensors, as well as
NAMUR type sensors, tacho generators or magnet-inductive sensors (MPUs).
With single channel processing (1oo1) security provision is solely determined by the
device configuration. Therefore the use of sensor monitoring with integrated plausi-
bility control is essential. In such a case no redundancy is provided. Should a fault be
detected, the entire system will be shut down immediately.
With two channel systems, there is a choice of implementation, dependent upon
requirements. In principle, the two monitors operate in parallel yet independently.
Alarm indication can be realized through the linkage of their Alarm Outputs.
For 1oo2 processing, we have system redundancy with enhanced security through
comparative diagnosis. In the case of fault detection, the entire system will be shut
down. With 2oo2 processing, we still have system redundancy but with enhanced
availability. Only if both monitors fail, the entire system will be shut down.
The D521 Speed Monitor permanently monitors the speed sensors for their correct
function. During its complete lifetime cycle, the Monitor does not require any external
proof tests and is completely maintenance-free.

Specifications of D521.xx

Conformity to Standards     2014/30/EU, EN IEC 61000-6-4, EN IEC 61326-3-1  2014/35/EU, EN IEC 61010-1

Measuring Principle              Frequency measurement, based on the input pulse distance, extended over a minimum period  of time,                                                 programmable 5 milliseconds…9.999 seconds.
Accuracy                                ±0.005% of value ±1 in last digit
Response                               1 input pulse interval + programmed minimum time + 5 milliseconds

Analog Output (option)        Isolated and protected against external short circuit. Current 0/4…20 mA with max. load of

                                             500 ohms, convertible to voltage 0/2…10 V with max. load 10 mA.
Range                                      High and low end of span programmable
Resolution                                 12 bit (1 : 4096)
Drift by temperature                   <0.01% within 0…40 °C (32…104 °F)
Long term stability                      <0.25% during 5000 hours of operation

Relay Outputs                       Two, both with SPDT contacts, also, as option, further two with PhotoMOS contacs.

Setpoints adjustment                Individually programmable from zero speed up to any high speed
Response characteristics             Hysteresis individually programmable in its position and width
Handling capacity                       Relay contacts 250 V, 2 A, 100 W AC, PhotoMOS contacts 60 V, 0.1 A DC
Alarm state position                   Individually programmable for excess, no power and input failure condition, starter period
Starter function                        Released by external control signal (12…24 V) to isolated input Extension programmable up to 999 sec.

Display                                   5 digits with red LED figures, 10 mm high

                                              Indicating the variable during operation, parameters during the programming phase

Data Interface                        RS232 at USB Mini B front socket (Baud rate programmable, up to 38400 baud)

Data output                              Measurements and signals state, upon request
Data input                                 Programming the parameters (equipment required see below)

Programming                           Manually by front keys, alternatively via RS232 (equipment required see optional accessories)

Data protection                         Parameters safe-guarded against power failure and code protected against unauthorized access

Signal Input                            Isolated circuit, responding to pulse signals of any waveform and to AC-signals

 Frequency range                       0 Hz…100 kHz
Signal level range                       Response level with step selection. Minimum signal 50 mV RMS, maximum 100 V
Input impedance                       100 kohms
Scaling factor                            Programmable by 5 digits, considering any relation to the variable
Suitable sensor types                 All BRAUN sensors or equivalent, NAMUR type sensors, tacho generators, incremental                                                                         encoders, MPUs
Sensor failure monitoring             Short-circuit or interrupt of supply (NAMUR types also), signal lead break sensors (with push-
                                               pull output only).
                                               A detected failure sets any of the alarms into a pre-programmable state.
Sensor supply                           13 V / max. 60 mA. Extra output 8 V via 1 kohm load resistor to passive 2 leads sensor types

Input Signal Repeater            Direct output: level 10 V, 1 k source impedance, isolated opto-coupler (to max. 30 V, 10 mA)

Power Supply                         Universal supply range 20…265 Vuc. Power consumption approx. 8 W
                                              Insulation category Class 1

Connectors (Wiring)               Screw mounting, 2 plug-in terminal blocks, accepting 0.2…2.5 mm 2 cross section

Environmental Conditions      Ambient temperature in operation: 0…+60 °C (+32…+140 °F)
                                              Ambient temperature in storage: -40…+85 °C (-40…+185 °F)
                                              Relative humidity max. 95%, non-condensing
Design                                   Snap-on-track plastic enclosure for 35 mm rail, field mounting enclosure (Option -G) on request
Dimensions                              See drawing dimensions
Protection Grade                      IP 40 for enclosure, IP 20 for terminals
                                             (also available in field mounting version, with transparent cover IP 65/NEMA 4) 
Weight                                  approx. 0.3 kg, resp. 1.0 kg for version -G
Optional Accessories             IS-RS232-S: CD-ROM with Interface Software to program parameters
                                            L3D01: Plug-in adapter cable, with 9-pole Sub-D (female) plug to PC

Function diagram and connections of D521.xx