nvent 21990-401 User manual

Schroff Shelf Manager ACB-VI
User‘s Manual
Product Numbers:
21990-401
21990-402
Doc-No: 63972-331_R1.2 March 2018

Impressum:
Schroff GmbH

Langenalber Str. 96 - 100
75334 Straubenhardt, Germany
The details in this manual have been carefully compiled and
checked - supported by certified Quality Management System
to EN ISO 9001/2000
The company cannot accept any liability for errors or misprints.
The company reserves the right to amendments of technical
specifications due to further development and improvement of
products.
Copyright2018
All rights and technical modifications reserved.
R1.0 March 2018 rebranded

Shelf Manager ACB-VI
I R1.2, March 2018
Table of Contents
1 Safety .................................................................................................................................... 1
1.1 Safety Symbols used in this document ........................................................................... 1
1.2 General Safety Precautions................................................................................................ 1
1.3 References and Architecture Specifications................................................................... 2
1.4 Terms and Acronyms.......................................................................................................... 2
1.5 Product Definition ................................................................................................................ 3
1.6 ACB-V Product Overview .................................................................................................... 5
1.7 Front Panel Components.................................................................................................... 6
2 ACB-VI Block Diagram ....................................................................................................... 7
3 IPMB...................................................................................................................................... 8
3.1 Bused IPMB Interface (Product Number: 21990-401).................................................. 8
3.2 Radial IPMB Interface (Product Number: 21990-402) .................................................. 8
4 RS-232 Interfaces ............................................................................................................... 9
4.1 Serial Console Cables........................................................................................................ 10
5 Ethernet Interface ............................................................................................................. 10
6 Shelf Manager and Shelf Alarm Panel.......................................................................... 11
7 Master-Only I²C Bus ......................................................................................................... 12
8 Power Supply..................................................................................................................... 13
8.0.1 DC-DC Converter ................................................................................................ 13
8.0.2 Input Fuses.......................................................................................................... 14
8.0.3 Voltage and Fuse Monitoring .......................................................................... 14
9 Fan Control......................................................................................................................... 15
9.1 Schroff Fan Trays............................................................................................................... 16
9.1.1 Control characteristics (examples) ................................................................ 16
10 Hardware Address............................................................................................................ 17
11 RESET ................................................................................................................................. 17
11.1 Reset Input / Output .......................................................................................................... 17
12 Redundancy Control......................................................................................................... 18
12.0.1 Hardware Redundancy Interface .................................................................... 18
13 Hot Swap Interface........................................................................................................... 18
13.1 Hot Swap LED ..................................................................................................................... 18
14 Telco Alarms...................................................................................................................... 19
15 Sensor Table...................................................................................................................... 20
15.1 Useful commands:............................................................................................................. 21
16 Shelf Manager Connectors ............................................................................................. 25
17 Technical Data................................................................................................................... 29

Shelf Manager ACB-VI
II R1.2, March 2018

Shelf Manager ACB-VI
Safety 1 R1.2, March 2018
1 Safety
The intended audience of this User’s Manual is system integrators and hardware/software
engineers. This manual describes the hardware features of the Schroff ACB-VI Shelf
Manager. The software features are detailed in the ShMM-700R documentation from
Pigeon Point Systems and the Schroff firmware release notes.
1.1 Safety Symbols used in this document
1.2 General Safety Precautions
• Service personnel must know the necessary electrical safety, wiring and connection prac-
tices for installing this equipment.
• Install this equipment only in compliance with local and national electrical codes.
• For additional information about this equipment, see the PICMG 3.0 
Specification (www.picmg.org).
Hazardous voltage!
This is the electrical hazard symbol. It indicates that there are dangerous voltages inside the
Shelf.
Caution!
This is the user caution symbol. It indicates a condition where damage of the equipment or
injury of the service personnel could occur. To reduce the risk of damage or injury, follow all
steps or procedures as instructed.
Danger of electrostatic discharge!
The Shelf contains static sensitive devices. To prevent static damage you must wear an ESD
wrist strap.
Warning!
Voltages over 42 VAC or 60 VDC can be present in ATCA Shelves. As defined in the PICMG 3.0
Specification, this equipment is intended to be accessed, installed, and maintained by

qualified and trained service personnel only.

Shelf Manager ACB-VI
Safety 2 R1.2, March 2018
1.3 References and Architecture Specifications
• Pigeon Point Systems IPM Sentry Shelf-External Interface Reference
(www.pigeonpoint.com)
• Pigeon Point Systems Shelf Manager User Guide
(www.pigeonpoint.com)
• PICMG® 3.0 AdvancedTCA® Base Specification
(www.picmg.org)
• ON Semiconductor ADT7490 Remote Temperature Sensor and Fan Controller
• Philips Semiconductors PCA9543 2-Channel I2C with interrupt logic and reset
• Philips Semiconductors PCA9555 16-bit I2C and SMBus I/O port with interrupt
• National Semiconductor LM75 Digital Temperature Sensor and Thermal Watchdog with
Two-Wire Interface
1.4 Terms and Acronyms
Table 1: Term s and Acronyms
Term Definition
ATCA Advanced Telecom Computing Architecture
Backplane Passive circuit board providing the connectors for the front boards. Power distribution, management and
auxiliary signal connections are supported
CDM Chassis FRU Data Module
ECN Engineering Change Notice
ESD Electrostatic Discharge
ETSI European Telecommunications Standards Institute
FRU Field Replaceable Unit
IPMB Intelligent Platform Management Bus
IPMC Intelligent Platform Management Controller
IPMI Intelligent Platform Management Interface
PCB Printed Circuit Board
PEM Power Entry Module
RTC Real Time Clock
RTM Rear Transition Module
Shelf Enclosure containing subrack, Backplane, boards, cooling devices, PEMs and Fan Trays
VRTN Voltage Return

Shelf Manager ACB-VI
Safety 3 R1.2, March 2018
1.5 Product Definition
The Schroff Shelf Manager ACB-VI is a 78 mm x 280 mm board that fits into a dedicated Shelf
Manager slot in a Schroff ATCA Shelf.
The Shelf Manager has two main responsibilities:
1 Manage/track the FRU population and common infrastructure of a Shelf, especially the
power, cooling and interconnect resources and their usage.
2 Enable an external System Manager to join in management/tracking through the System
Manager Interface, which is typically implemented over Ethernet.
The Shelf management is based on the Pigeon Point Shelf management solution for
AdvancedTCA products.
The Shelf management software runs on the Pigeon Point Shelf Management Mezzanine
700 (ShMM-700R), a compact 204-pin SO-DIMM form-factor module, installed on the
ACB-VI carrier board.
The ACB-VI carrier board includes several on-board devices that enable different aspects of
Shelf management based on the ShMM-700R. These facilities include I²C-based hardware
monitoring/control and GPIO expander devices.
The ACB-VI also provides the Fan Controller for up to 9 Fans and individual Ethernet
connections to both Base Hubs (ShMC cross connect).
The Shelf Manager communicates inside the Shelf with IPM controllers over the Intelligent
Platform Management Bus (IPMB). The Shelf Manager also provides an IPMB interface for the
non-intelligent FRUs in a Schroff Shelf. The Shelf Manager communicates with the non-
intelligent FRUs over I²C busses and expose the sensors for these FRUs at IPMB address 0x20.
Shelf Manager with bused IPMB: 21990-401 (Product Number) 
21990-404 (Catalog Number with packaging)
Shelf Manager with radial IPMB: 21990-402 (Product Number) 
21990-405 (Catalog Number with packaging)
The new ACB-VI is plug-compatible with the ACB-V but the Shelf‘s FRU-data file
must be updated.
The ACB-V and ACB-VI shelf manager support converting a live shelf from
ACB-V to ACB-VI without losing manageabilty of the shelf. Please see
Schroff‘s firmware release notes for details.

Shelf Manager ACB-VI
Safety 4 R1.2, March 2018
Figure 1: Schroff Shelf Manager ACB-VI
12714825
1Extraction handle 5Backplane Connector (X100)
2ShMM-700R 6Backplane Connector (X102)
3RTC backup capacitor 7Fixing screw
4ACB-VI Carrier Board

Shelf Manager ACB-VI
Safety 5 R1.2, March 2018
1.6 ACB-V Product Overview
• 78 mm x 280 mm board
• SO-DIMM 204-pin socket with ShMM-700R Shelf Management Mezzanine Card from
Pigeon Point Systems
• Dual RS-232 serial ports
• Dual 10/100 Ethernet interfaces
• IPMB-A/B interfaces with bused or radial topology
• Reset push button
• Master-only I²C bus populated with hardware monitoring/control, GPIO and bus switch
devices
• Power supply voltage monitoring
• On-board temperature monitoring
• Detection of hardware address with parity
• Injector/Ejector handle with Hot Swap switch
•HotswapLED
• Capacitor for the ShMM-700R RTC
• Hardware redundancy interface with dedicated communication paths between dual Shelf
Managers for redundant operation
• Interrupt requests for the ShMM-700R generated by on-board and off-board devices
• Status indication for important interfaces, using on-board and off-board LEDs
• Fan Controller for controlling/monitoring up to 9 fans
• Redundant –48 VDC inputs with on-board power regulation
All pictures in this manual may differ from the latest release.

Shelf Manager ACB-VI
Safety 6 R1.2, March 2018
1.7 Front Panel Components
Figure 2: Shelf Manager Front Panel Components
12708844
1Fixing screw 6RESET push button
2ETH 0 Ethernet Service Connector
(RJ45) 7Shelf Manager Status LED (red)
- Red = Out of Service (OOS)
3ETH 0 Link/Activity LED (yellow)
- On = Link
-Off=NoLink
- Blinking = Activity
8Shelf Manager Status LED (green)
- Solid Green = in Service, active Shelf
Manager
- Blinking = in Service, Backup Shelf
Manager
4ETH 1 Link/Activity LED (yellow)
- On = Link
-Off=NoLink
- Blinking = Activity
9Hot Swap Switch
- Activated by extraction handle
5Hot Swap LED (blue)
- Solid Blue = ready to remove
- Blinking = Hot Swap is requested
- Off = No Hot Swap possible
10 Extraction handle

Shelf Manager ACB-VI
ACB-VI Block Diagram 7 R1.2, March 2018
2 ACB-VI Block Diagram
Figure 3: ACB-VI Block Diagram
LM75
0x4F
0x57
SEEPROM
ShMM-700R
Fan 4-6 Tacho
DC Fan Control
PWM Fan Control
User selectable by switch
CH1 LTC4300 CH1
CH2 LTC4300
CH3 LTC4300
CH40
LTC4300 CH4
CH2
CH3
LTC4300 CH0
CH1
CH4
CH2
CH3
CH0
CH4
CH0
PCA9543
2 Channel
I2C Switch
0x70
Hot
Swap
EMI
Filter
48 V
3.6 V
Overcurrent
Protection
Overcurrent
Protection
PCA9555
FRU
Presence
and Fuse
Monitoring
0x25
ADT7490
I2C_PWR_A_MON
Fan 7-9 Tacho
ADT7490
I2C_PWR_B_MON
PWM
Voltage
Fan 1-3 Tacho
ADT7490
0x2C
0x2E
0x2D
PCA9554
0x23
Hardware Address (HA)
FRU Presence
Fuse Mon.
MRST_IN
ETH0
ETH1
I2C0
I2C1
I2C2
I2C3
I2C4 I2C_LOCAL
RTC
ETH0
ETH1
RESET
Red
Status
Green
Status
Blue
Hot Swap
Hot Swap
HANDLE_CLOSED
BLUE_LED
STATUS_LED_GREEN
STATUS_LED_RED
ETH1_ACT
ETH0_ACT
20 V Power-
Supply for
Opto-couplers
24 VDC
generated
on Fan Trays
20 V_MON
LTC4300
LTC4300
SPI_A
FPGA 1
FPGA 2
IPMB_A radial
16
IPMB_B radial
Assembly Option bussed IPMB
Assembly Option radial IPMB
16
3.3 V
3.6 V
SPI_B
Cross_A
Cross_B
Redundancy Data

Shelf Manager ACB-VI
IPMB 8 R1.2, March 2018
3 IPMB
3.1 Bused IPMB Interface (Product Number: 21990-401)
The ShMM-700R provides two IPMBs. The IPMB-A and IPMB-B from the ShMM-700R are
routed to the Backplane connector through I2c buffers. The ATCA Backplane buses the two
IPMBs to the ATCA boards.
The Active# signal of the ShMM-700R is used to switch on/off the pull-up resistors of the
IPMBs.
Figure 4: Block diagram bused IPMB
3.2 Radial IPMB Interface (Product Number: 21990-402)
Radial IPMB is implemented by 2 FPGAs connected to the Serial Peripheral Interfaces (SPI) on
the ShMM700R.
Figure 5: Block diagram radial IPMB
7R
Enable
Ready
Enable
Ready
LTC
4300
LTC
4300
ShMM-700R
SPI_A
SPI_B
3.3 V
.....
.....
.....
FPGA 1
IBMB_A 1
Radial_B_Enable
Radial_A_Enable
Cross_B_Enable
Cross_B_Enable
IBMB_A 16
.....
.....
FPGA 2
IBMB_B 1
IBMB_B 16
IBMB_B Cross
IBMB_A Cross
.....
Backplane Connector

Shelf Manager ACB-VI
RS-232 Interfaces 9 R1.2, March 2018
4 RS-232 Interfaces
The ACB-VI provides two RS-232 interfaces. The first serial port is implemented using the
UART0, the second serial port is implemented using the UART1 on the ShMM-700R.

The first serial interface provides a full set of RS-232 signals, including modem control. In a
Schroff Shelf these signals are routed through the backplane connector to the SAP. The SAP
provides two 8-pin RJ45 modular receptacles for the serial interfaces of both Shelf Managers.
The second serial interface does not provide modem control signals. These signals are also
routed to the backplane connector but not used in the Schroff ATCA Shelves.
Figure 6: RS-232 Serial Ports
.
ShMM-700R Connector
Backplane Connector
UART0
UART1
ACB-VI
ShMM-700R
UART0 TXD
UART0 RXD
UART0 CD
UART0 DTR
UART0 DSR
UART0 RTS
UART0 CTS
UART0 RI
UART1 TXD
UART1 RXD
Filter
The serial console default configuration is:
• 115200 baud
• no parity
• 8 data bits
• 1 stop bit

Shelf Manager ACB-VI
Ethernet Interface 10 R1.2, March 2018
4.1 Serial Console Cables
To connect to the Shelf Manager via the serial console on the SAP you need a serial console
cable wired according to the CISCO convention.
Figure 7: RJ45 to DB9 Serial Console Cable
The connectors are shown with the cables pointing away.
5 Ethernet Interface
The front panel ETH0 Ethernet connector is intended for service use only or for debugging
purposes in laboratory environment. The computer which is connected to this interface must
be located nearby the shelf manager with an Ethernet cable that is not longer than 10 m.
The front panel Ethernet connector MUST NOT be connected to a Telecommunication
Network Circuit that leaves the building.
The ETH0 interface of the shelf manager can manually be switched between the front panel
RJ45 connector (“Front”-position of the rocker-switches) and the backplane connector going
to the hub board base interface (“Back”-position of the rocker-switches).
The ATCA specification requires a base channel interface between the shelf manager and the
Hub board. The ETH0 rocker-switches MUST be in “Back”-position in normal operation of the
shelf manager in an ATCA-shelf.
Figure 8: ETH-Switches shown in default position
12706929
RJ45-male DB9-female
1
2
3
4
5
6
7
8
RTS
DTR
TxD
GND
GND
RxD
DSR
CTS
8
6
2
5
5
3
4
7
CTS
DSR
RxD
GND
GND
TxD
DTR
RTS
51
9
6
18
Depending on the model of the Shelf, the RJ45 connector may have a different
pinout of the serial console signals. Refer to the Shelf manual for detailed

information.
12708853

Shelf Manager ACB-VI
Shelf Manager and Shelf Alarm Panel 11 R1.2, March 2018
6 Shelf Manager and Shelf Alarm Panel
Some Shelf Manager I/O function have been moved to a separate Board called a Shelf Alarm
Panel (SAP). The SAP provides the RJ45 Serial Console connectors, Telco Alarm Interface, user
definable LEDs and custom specific I/Os for the Shelf Manager. Only the active Shelf Manager
has access to the SAP and can control the Alarms. The advantage of this approach is that the
SAP is separated from the Shelf Manager and can be located at a position at the Chassis that
is easy to reach and operate by service personnel.
The figure below shows the interconnection between the Shelf Managers and the SAP. Please
note that the design of the SAP is Shelf dependent. Please see your Shelf User Manual for the
actual SAP-implementation in your Shelf.
Please see chapter „Telco Alarms“ for detailed information concerning the Telco Alarm
interface and the user definable LEDs.
Figure 9: Connection between Shelf Manager and SAP
SERIAL 1
USER 1
SERIAL 2
USER 2
USER 3
MINOR
MAJOR
CRITICAL
Primary ShelfManager
ShMM-700R
CH0
SILENCE
Telco Alarm
SAP
Alarm LEDs User LEDs
I2C3UART0
LTC4300LTC4300
PCA9543
Ch4
Filter
Secondary ShelfManager
ShMM-700R
CH0
I2C3
UART0
LTC4300LTC4300
PCA9543
Ch4
Filter

Shelf Manager ACB-VI
Master-Only I²C Bus 12 R1.2, March 2018
7 Master-Only I²C Bus
The ACB-VI carrier board has a number of onboard I²C devices connected to the local I²C bus.
These devices are:
• PCA9554: reads the hardware address at the backplane connector
• PCA9555: monitors the presence signals from the PEMs, SAP, Air Filter, Fan Trays and the
presence of the input voltages and fuses.
• ADT7490: monitor voltages, monitor/controls the Fan Trays
• LM75: on-board temperature
•SEEPROM:ShelfManager FRU information
• PCA9543: This 2-channel switch divides the I²C-bus 3 into 2 channels to:
- the SAP (Channel 0)
- the PEMs (Channel 4)
The ’Active’ signal of the ShMM-700R is used to enable the LTC4300, so that only the active
Shelf Manager has access to the Shelf I²C-bus devices.
Figure 10: Master-Only I2C-bus
ShMM-700
I2C0
I2C1
I2C2
I2C3
I2C4 (local)
LTC4300A-1
LTC4300A-1
LTC4300A-1
LTC4300A-1
Backplane
LM75 SEEPROM
LTC4300A-1
Active signal
CH1
CH2
CH3
CH4
CH0
PCA9555
ADT7490
To CDM 1
To CDM 2
To FT
To
PEM,
PSUs
To SAP
IDTQS3VH384PAG
3.3 V
3.3 V
3.3 V
3.3 V
3.3 V
PCA9543
0x25
PCA9554
0x230x570x4F
0x70
0x2C
ADT7490
0x2D
ADT7490
0x2E
3.3 V
3.3 V

Shelf Manager ACB-VI
Power Supply 13 R1.2, March 2018
8 Power Supply
Figure 11: Power Supply Block Diagram
8.0.1 DC-DC Converter
The DC-DC converter on the ACB-VI provides the power for all on-board devices and all off-
board I²C devices inside the Shelf.
The 3.6 V local power is routed through two current limiting circuits to create two redundant
voltages, I2C_PWR_A and I2C_PWR_B.
I2C_PWR_A and I2C_PWR_B are routed to the backplane connector and used to power I²C-
devices on FRUs like the Fan Tray, PEM or SAP. If one of these voltages is short circuited in a
chassis FRU or on the backplane, the short circuit current is limited to 700 - 900 mA so that
the Shelf Manager and the FRUs are still fully operational.
Backplane Connector
5 V for ShMM-700R
I2C_PWR_A
I2C_PWR_B
FAN_24V
Linear-
regulator
20V_MONITOR
-48V_B_FUSED_MON
-48V_A_FUSED_MON
-48V_A_MONITOR
-48V_B_MONITOR
PCA9555
ADT7490
0x2D
ADT7490
0x2E
CAP
RTC
ADT7490
0x2C
3.6 V/5 V
DC/DC
3.6 V
0x25
3.6 V/3.3 V
DC/DC

Shelf Manager ACB-VI
Power Supply 14 R1.2, March 2018
8.0.2 Input Fuses
The –48 V input circuits are protected by fuses, one in the supply and in the return path.
Figure 12: Input fuses
8.0.3 Voltage and Fuse Monitoring
To detect a missing supply voltage as well as a blown fuse the ADT7490 and PCA9555 provide
voltage monitoring and control functions.
The fuses are not user-serviceable.
Signal Description Device Measurement
3.3V local 3.3 V supply for ACB-VI on-board devices and
for the ShMM-700R ADT7490 0x2C Analog
5V 5 V supply for the ShMM-700R ADT7490 0x2C
pin 2 Analog
I2C_PWR_A 3.6 V supply redundant path A going to Shelf
I²C-devices ADT7490 0x2D pin 20 Analog
I2C_PWR_B 3.6 V supply redundant path B going to Shelf
I²C-devices ADT7490 0x2E pin 20 Analog
VBAT Backup-CAP voltage ADT7490 0x2E
pin 21 Analog
-48V_A_MONITOR Indicates the presence of the –48 V_A /
VRTN_A at the backplane connector. PCA9555 I/O 0.5 Presence/Absence
-48V_A_FUSED_MONITOR Indicates the presence of the –48 V_A /
VRTN_A after the ACB-VI’s mains fuse. PCA9555 I/O 0.3 Presence/Absence
-48V_B_MONITOR Indicates the presence of the –48 V_B /
VRTN_B at the backplane connector. PCA9555 I/O 0.6 Presence/Absence
-48V_B_FUSED_MONITOR Indicates the presence of the –48 V_B /
VRTN_B after the ACB-VI’s mains fuse. PCA9555 I/O 0.4 Presence/Absence
20V_MONITOR Indicate the presence of the 20 V auxiliary
voltage supply generated on Fan Trays PCA9555 I/O 0.7 Presence/Absence

Shelf Manager ACB-VI
Fan Control 15 R1.2, March 2018
9 Fan Control
The Shelf Manager provides fan control functionality through the ADT7490 fan controllers.
The fan speed is controlled by a PWM signal generated on the ADT7490 0x2E. The PWM
output from the ADT7490 is buffered and enabled by the Carrier_Active signal so that only
the active Shelf Manager controls the fan speed. The PWM signal is opto-isolated and routed
to the backplane connector.
For voltage-regulated Fans the Shelf Manager provides an integrator that converts the PWM
signal into a DC-voltage of 0 V to 10 V, referenced to the ground level of the Fan Tray
electronics (FAN_24V_RTN), which is also available on the backplane connector.
The tachometer signals from the Fans are routed through the backplane connector to the
opto-isolated tachometer inputs of the 3 ADT7490.
Three digital inputs to the PCA9555 (I/O 1.0....I/O 1.2) are used to detect presence of the Fan
Trays. The Fan Tray grounds the signal to indicate that it is installed.
The Shelf Manager’s fan tachometer inputs and fan control outputs (DC, PWM) are optically
isolated from primary voltages of the fans. The primary side of the opto couplers is powered
by a 24 V voltage (FAN_24V) which is generated on the Fan Trays and routed together with
the Fan Tray ground reference (FAN _24V_RTN) to the Shelf Manager.
Figure 13: Shelf Manager Fan Control Block Diagram
ADT7490
0x2C
Fan 1...3 Tachometer
20 V Power Supply
for Opto-couplers
24 VDC generated on Fan Trays
Fan Tray Ground reference
(FAN_24V_RTN)
PWM Fan Control Signal
0....10 V DC Fan Control Signal
local I²C-Bus
VRTN_B
-48V_A
VRTN_A
Fan_Tach
48 V
Backplane Connector
FAN_24V
FAN_24V_RTN
24 V
-48V_B
/
3
Backplane Connector
/
3
ADT7490
0x2D
Fan 4...6 Tachometer
Fan_Tach
/
3/
3
ADT7490
0x2E
Fan 7...9 Tachometer
Fan_Tach
/
3/
3
PWM Contr. Fans
Volt. Contr. Fans
from Fan Tray 2
from Fan Tray 3
Fan Tray 1
PWM
PCA9555
0x25
Fan Tray 2
Fan Tray 3

Shelf Manager ACB-VI
Fan Control 16 R1.2, March 2018
9.1 Schroff Fan Trays
9.1.1 Control characteristics (examples)
Figure 14: Fan Speed Control (PWM) for Shelves 11592-50x
Figure 15: Fan Speed Control (Control Voltage) for Shelves 11592-40x
Figure 16: Fan Tacho Signal Output
Table 2: Fan Tacho Data
12706964
1000
0
2000
3000
4000
5000
020 40 60 80 100
PWM (%)
Fan Speed (rpm)
Speed-up Speed-down
12706965
1000
0
2000
3000
4000
5000
6000
0246810
ControlVoltage (V)
Fan Speed (rpm)
12706966
Tacho Signal
1 rev
tt
12
Fan Speed
US Low
US High
nmin
nmax
n
US
t
t
Description Comment Value
Tacho Type /2 (open collector)
Tacho operating voltage up to 30 V
Tacho level low ISINK = 2 mA < 0.4 V
Output Frequency (2 x n) / 60 Hz