Sens SuperTorque 8Z User manual

SENS SuperTorque™8Z Technical Manual
1
SENS Part Number: 101341
Document Revision: A
DCN Number: 108283
Date: April 29, 2023
PATENTED US 9,270,140; 9,385,556; 9,413,186; 9,509,164;
9,466,995
Installation or service questions?
Call SENS between 8 a.m. and 5 p.m. (Mountain Time),
Monday through Friday, or visit our website.
Copyright © Stored Energy Systems LLC 2023
The SENS name / logo and Dynamic Boost are trademarks of Stored Energy Systems LLC
Installation & Operation Manual
SuperTorque™8Z
Genset Starting System
Super High-Performance Battery + Integrated Charger System
1840 Industrial Circle
Longmont, CO 80501
Phone: [phone]
800.742.2326
Fax: [phone]
Email: [e-mail]
Web: www.sens-usa.com

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TABLE OF CONTENTS
1IMPORTANT SAFETY INSTRUCTIONS FOR INSTALLER AND OPERATOR ............................................................ 4
2MODEL NUMBER BREAKOUT.............................................................................................................................. 6
3PERFORMANCE SPECIFICATIONS........................................................................................................................ 7
4SYSTEM OVERVIEW............................................................................................................................................. 9
4.1. Physical Overview ......................................................................................................................................9
4.2. Functional Overview ................................................................................................................................ 10
5MOUNTING INSTRUCTIONS.............................................................................................................................. 11
5.1. Mounting..................................................................................................................................................11
6SETUP AND WIRING .......................................................................................................................................... 12
6.1. Wire Ratings.............................................................................................................................................12
6.2. Grounding Instructions ............................................................................................................................ 12
6.3. Sleep and Wake Up Buttons.....................................................................................................................12
6.4. DC Connection.......................................................................................................................................... 13
6.5. AC Connection..........................................................................................................................................14
6.6. AC Pass-through.......................................................................................................................................14
6.7. Alarm Connections................................................................................................................................... 14
6.8. RS-485 Connection................................................................................................................................... 15
6.9. Ethernet or SAE J1939.............................................................................................................................. 17
6.10. SENSbus Connection ................................................................................................................................18
6.11. USB Connection........................................................................................................................................19
6.12. Verify Connections ...................................................................................................................................19
7START-UP PROCEDURE ..................................................................................................................................... 20
7.1. Connect DC Output ..................................................................................................................................20
7.2. Apply AC Power........................................................................................................................................20
7.3. Connect Alarms and Communications.....................................................................................................20
8ALARMS, LEDS AND DISPLAY ............................................................................................................................ 21
8.1. LED Indicators...........................................................................................................................................21
8.2. Individual Alarm Relay Contacts...............................................................................................................21
8.3. LCD Panel .................................................................................................................................................21
8.4. Latched Alarms.........................................................................................................................................22
8.5. Alarm Definitions .....................................................................................................................................22
9OPERATION ....................................................................................................................................................... 26
9.1. Charging Algorithms.................................................................................................................................26
9.2. Float Mode............................................................................................................................................... 26
9.3. Dynamic Boost™Mode ............................................................................................................................26
9.4. Battery Check ........................................................................................................................................... 26
9.5. Restore Factory Defaults..........................................................................................................................27
9.6. Keypad Operation—Optional...................................................................................................................27
9.6.3. Menu Options ..........................................................................................................................................27
9.7. Configuration and Monitoring with SENS Setup Utility ...........................................................................33
9.8. Temperature Compensation....................................................................................................................33
9.9. Parallel/Load Share Operation................................................................................................................. 33
9.10. Remote Alarm/Communications Panel Accessory................................................................................... 33
10 SERVICE AND MAINTENANCE ........................................................................................................................... 34
10.1. Recommended Annual Maintenance....................................................................................................... 34
10.2. Service......................................................................................................................................................34
11 J1939 COMMUNICATIONS ................................................................................................................................ 34
11.1. J1939 Data Messages...............................................................................................................................34
12 MODBUS COMMUNICATIONS .......................................................................................................................... 35
12.1. TCP/IP Modbus—Optional .......................................................................................................................35
12.2. Modbus RS-485—Optional....................................................................................................................... 35
12.3. Modbus Holding Registers ....................................................................................................................... 36
12.4. Basic Charging Alarms Bit Definition........................................................................................................ 37
12.5. Charging Status Bit Definition ..................................................................................................................38

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12.6. Charging Alarms Extended Bit Definition.................................................................................................39
12.7. Charging AC Alarms Bit Definition............................................................................................................ 39
12.8. Accessory Channel Alarms Bit Definition .................................................................................................39
12.9. Accessory System Alarms Bit Definition...................................................................................................40
12.10. Accessory Assigned Channel Alarms Bit Definition..................................................................................40
12.11. Writable Control Flags (Coils)...................................................................................................................40
13 TROUBLESHOOTING/ERROR CODES................................................................................................................. 41
13.1. Configuration Error Codes........................................................................................................................41
13.2. Troubleshooting .......................................................................................................................................42
14 RECYCLING......................................................................................................................................................... 45
15 GLOSSARY.......................................................................................................................................................... 46

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1IMPORTANT SAFETY INSTRUCTIONS FOR INSTALLER AND OPERATOR
1.1. SAVE THESE INSTRUCTIONS –This manual contains important safety and operating instructions for
SuperTorque 8Z genset starting systems.
Conserver ces instructions. Ce manuel contient des instructions importantes concernant la sécurité et le
fonctionnement.
1.2. Before using genset starting system, read all instructions and cautionary markings on product.
1.3. Do not expose to rain or snow.
1.4. Use of an attachment not recommended or sold by the manufacturer may result in a risk of fire, electric
shock, or injury to persons.
1.5. This genset starting system is intended for commercial and industrial use. ONLY TRAINED AND QUALIFIED
PERSONNEL MAY INSTALL AND SERVICE THIS UNIT.
1.6. Do not operate genset starting system if it has received a sharp blow, been dropped, been inverted, or
otherwise damaged in any way; shut off power at the branch circuit protectors and have the unit serviced
or replaced by qualified personnel.
1.7. To reduce risk of electric shock, disconnect the branch circuit feeding the genset starting system before
attempting any maintenance or cleaning. Turning off controls will not reduce this risk.
1.8. WARNING –RISK OF FIRE, EXPLOSION OR BURNS
1.8.1. WORKING IN THE VICINITY OF A NICKEL-ZINC BATTERY IS DANGEROUS. STORAGE BATTERIES
GENERATE EXPLOSIVE GASES DURING NORMAL BATTERY OPERATION. FOR THIS REASON, IT IS OF
UTMOST IMPORTANCE THAT YOU READ THIS MANUAL AND FOLLOW THE INSTRUCTIONS EACH
TIME YOU USE THE GENSET STARTING SYSTEM.
1.8.2. Do not disassemble battery, heat above 75°C, incinerate, puncture or impact.
Mise en garde : Risque d’incendie, d'explosion ou de brûlures. Ne pas démonter, chauffer à plus de
75°C (ou °F) ou incinérer.
1.8.3. To reduce the risk of battery explosion, follow these instructions and those published by the battery
manufacturer and the manufacturer of any equipment you intend to use in the vicinity of a battery.
Review cautionary markings on these products and on the engine.
Pour réduire le risque d’explosion, lire ces instructions et celles qui figurent sur la batterie.
1.8.4. Ensure battery spill control procedures exist in accordance with building, fire and installation codes.
1.9. PERSONAL PRECAUTIONS
1.9.1. Someone should be within range of your voice or close enough to come to your aid when you work
near a storage battery.
1.9.2. Have plenty of fresh water and soap nearby in case battery electrolyte contacts skin, clothing, or
eyes.
1.9.3. Wear complete eye protection and clothing protection. Avoid touching eyes while working near a
storage battery.
1.9.4. If battery electrolyte contacts skin or clothing, wash immediately with soap and water. If electrolyte
enters eye, immediately flood the eye with running cold water for at least 10 minutes and get
medical attention immediately.
1.9.5. NEVER smoke or allow a spark or flame in vicinity of battery or engine.
Ne jamais fumer près de la batterie ou du moteur et éviter toute étincelle ou flamme nue à proximité

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de ces derniers.
1.9.6. Be extra cautious to reduce risk of dropping a metal tool onto the battery. It might spark or short
circuit the battery or another electrical part that may cause explosion. Using insulated tools reduces
this risk but will not eliminate it.
1.9.7. Remove personal metal items such as rings, bracelets, necklaces, and watches when working with a
storage battery. A storage battery can produce a short circuit current high enough to weld a ring or
the like to metal, causing a severe burn.
1.9.8. NEVER charge a frozen battery.
Ne jamais charger une batterie gelée.
1.9.9. The charging circuit contains a DC output fuse for internal fault protection, but this will not protect
the DC wiring from fault currents available from the battery. Consult national and local ordinances
to determine if additional battery fault protection is necessary in your installation.
1.10. Preparing Battery For Charge
1.10.1. Ensure area around battery is well ventilated and in accordance with local fire and installation codes
while battery is being charged.
1.10.2. Ensure battery terminals are clean and properly tightened. Be careful to keep corrosion from
coming in contact with eyes.
1.10.3. Do not operate genset starting system with damaged cables. Defective cables must be replaced
before operation.
1.10.4. Verify that all cables are properly secured and connected.
1.11. Installation Location
1.11.1. Operating temperature: -10°C to 55°C
1.11.2. Do not tip, keep genset starting system level.
1.11.3. Do not set anything on top of genset starting system.
1.12. Warranty and Service
1.12.1. Do not open genset starting system, not field serviceable.
1.12.2. Always operate within -10°C to 55°C. Do not operate outside of 0°C to 50°C for more than 10% of
operating life.

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2MODEL NUMBER BREAKOUT
8Z
-
24
-
B
-
15
-
B
-
1
-
1
-
00
A
-
B
-
C
-
D
-
E
-
F
-
G
-
H
Parameter
Code
Value
A
Product Family
8Z
SuperTorque 8Z
B
DC Output Voltage
12
12 VDC
24
24 VDC
C
Battery Capacity
B
80 Ah
D
Charging Current
15
15 Amps
E
Interface and
Communication
A
Base model; includes status LEDs, two Form C
relays, SENSbus, USB-C
B
Base model + LCD + keypad control + J1939 + RS-
485 Modbus
C
Base model + LCD + keypad control + RS-485 and
TCP/IP Modbus
F
Mounting
1
Standard, not for rigid mounting
2
With rigid mounting brackets
G
Terminals
1
Threaded inserts for ring lug connection (M8)
2
SAE battery terminal posts
H
Configuration
00
Standard Configuration

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3PERFORMANCE SPECIFICATIONS
SuperTorqueTM 8Z is a genset starting system including a high-performance NiZn battery, charging system,
controls, communications, and user-interface in one package, specially targeted for long-life and high reliability.
2 Standard Form C contact alarms are factory set and field reconfigurable, with indication via communication
port, optional front panel LCD and assignable alarm relays. Keypad control and data communications including
serial and Ethernet Modbus optional. Specifications are detailed in the table below, see following sections for
installation and operation instructions.
AC Input
VAC, Hz
90-265 VAC single-phase, 47-63 Hz
24V: full charging current available above 170VAC input, 80% rated
charging current 100-170VAC
Protection
Supplementary overcurrent protection fuse, transient protected to EN
61000-4-5 level 4
Power factor &
efficiency
PF >.95 typical; efficiency to 93%; meets CEC Title 20 Efficiency
Regulations; standby AC draw < 3W
DC Charging
Output
Volts
12V or 24V nominal with less than 30mV ripple
Recharge rate
80-160Ah battery capacity, 15A charge current
Charging modes
NiZn-specific, multi-stage, non-adjustable
Current limit
Factory set at 100% of rating
Charging
characteristic
Constant voltage, current limited; patented Dynamic Boost control
Line & load regulation
±0.5%
Battery temp.
compensation
Standard
Engine Starting
Performance
Typical cranking
current
2,700 amps at breakaway while maintaining battery terminal voltage
above 12.0 volts (24V model). Rolling current is typically ~30% of
breakaway (locked rotor) current.
Typical engine
displacement per 8Z
unit
70 liter per one 24-volt 8Z battery system. Actual performance depends
on number of starters and installation
Typical crank cycles
Depends on number of starters and their configuration. More than four
cranks of 15 seconds typical.
Sequential discharges
Delayed recharge may occur after multiple sequential discharges. See
recharge section for details.
Redundancy
Combine 8Z units in parallel for increased starting performance and
redundancy. Integrates seamlessly with Best Battery Selectors for isolated
redundancy.
Status Display
LEDs
Two multi-color front panel status LEDs
Metering & status
display
Optional, requires LCD. Battery voltage accurate to +1%; charger current
to +1%; 20-character display of status & alarms.
Quiescent draw
Max quiescent draw with AC disconnected and unit not in “Sleep” mode:
Model
12/24V
Base model
164mA/82mA
Base model + LCD + keypad +
Modbus RS-485
193mA/101mA
Base model + LCD + keypad +
Modbus RS-485 and TCP/IP
237mA/123mA

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Alarms
Alarms
Factory set, field reconfigurable. Alarm functions announced on the J-
1939 and Modbus ports and on the optional LCD. Any one of 20+ alarms
or any combination of alarms is assignable to either Form C contact.
Alarms: Form C
contacts
Two Form C contacts, each rated 30V, 2A resistive, assignable
Networking
J-1939
communications
Optional CAN 2.0 extended ID on RJ-45 port
Modbus
communications
Optional Modbus RS-485 or TCP/IP on RJ-45 port
SENSbus
Proprietary bus for connection of paralleled units and SENS accessories
USB
USB-C connectivity via SENS Setup Utility
Environmental
Operating
temperature
-10°C to +55°C; storage from -20°C to +60°C
Humidity
5% to 95%, non-condensing
Altitude
Full specification 0 to 13,000 ft (0 to 4000 m)
Ingress protection
NEMA2/IP22, NEMA3R/IP34 with optional field cover (p/n 209665-22), UL
“Rainproof”
Vibration & shock
resistance
Vib: Swept Sine (EN60068-2-6): 4G, 18-500 Hz, 3 axes. Random: 20-500Hz,
.01G2/Hz. Shock: EN 60068-2-27 (15G)
Electrical transient
ANSI/IEEE C62.41 & EN 61000-4-12 on power terminals
Abuse
Protection
Overvoltage
shutdown
Selective; shutdown only operates if the overvoltage condition is caused
by the internal charger itself
Overtemperature
protection
Gradual output power reduction if heatsink temperature becomes
excessive; recovery is automatic.
Regulatory
Compliance
North America
Internal batteries and charger are C-UL Listed/Recognized for US &
Canada
NFPA-70
FCC Part 15, Class B
Seismic: Rigid & non-isolated floor mount; max SDS of 2.5G, z/h = 0, Ip =
1.5. IBC 2000-2021, Calif. BC 2007-2021
American Bureau of Shipping: Type Approved
European Union (CE),
United Kingdom
(UKCA)
EMC: 2014/30/EU, UK 2016 (EN 61000-6-2 & EN 61000-6-4)
LVD/Safety: 2014/35/EU, UK 2016 (EN 60335-1 & EN 60335-2-29)
RoHS: 2015/863, UK 2012 (EN 63000)
Battery Directive: 2006/66/EC
Construction
Housing/configuration
Rainproof aluminum enclosure with non-conductive top
AC connections
AC Input Connection: IEC 320 C13
AC Pass-through Connection: IEC 320 C14, 750W maximum
AC Input Locking 8ft cord with NEMA 5-15R plug provided.
Optional UL Listed field-terminable IEC 320 C13 connector for hard wiring.
DC connections
Standard: M8 threaded inserts for positive and negative.
Optional: SAE battery terminal posts.
Alarms & comms
connections
J-1939 and Modbus TCP/IP: RJ-45; Modbus RS-485 and Form C alarms: 28-
16AWG terminal blocks

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4SYSTEM OVERVIEW
4.1. Physical Overview

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4.2. Functional Overview
4.2.1. Configuration
Each SuperTorque 8Z comes factory configured from the factory and requires no output
adjustments. Configuration details are given on the configuration label. These values are assigned
according to the profile configuration selected during the customer order. Adjustments to
communications settings and other configurable settings can be made using the front panel
keypad (optional) or the SENS Setup Utility software. Connect a computer with the SENS Setup
Utility to the unit via USB-C.
Example Configuration Label
4.2.2. Standard Items
4.2.2.1. 2 Form C alarm relay contacts
4.2.2.2. USB-C
4.2.2.3. SENSbus communications
4.2.3. Factory Optional Items
4.2.3.1. Front panel LCD
4.2.3.2. Keypad control
4.2.3.3. Modbus (TCP/IP and RS-485) communications

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5MOUNTING INSTRUCTIONS
INSTALLATION OF THE UNIT MUST COMPLY WITH LOCAL ELECTRICAL CODES AND OTHER APPLICABLE
INSTALLATION CODES AND BE MADE ACCORDING TO THE INSTALLATION INSTRUCTIONS AND ALL APPLICABLE
SAFETY REGULATIONS.
Printed circuit boards contain static sensitive components. Damage can occur even when static levels are too low
to produce a noticeable discharge shock. To avoid static discharge damage, handle the unit by the chassis only.
5.1. Mounting
See diagrams at back of manual for dimensions and mounting information.
5.1.1. Unit rated IP44, NEMA 3R.
5.1.2. Operate unit at -10°C to +55°C (14°F to +131°F). Do not operate outside of 0°C to 50°C (32°F to
122°F) for more than 10% of operating life.
5.1.3. Mounting surface must safely support the weight of the unit and the fixed wiring. Unit weighs
89.0 lb (40.4 kg). Lift the unit using a lifting device or two or more people.
5.1.4. Place on battery shelf or in battery box. Optional rigid floor mounting brackets available; install
using 3/8-inch fasteners (provided by installer).
5.1.5. Mount with battery terminals facing up. Do not permanently tip unit.
5.1.6. Allow sufficient room for routing the fixed wiring to the unit. AC, alarm and communications field
connections may enter the unit side using 1/2-inch conduit knockouts. See diagrams at back of
manual for further information.

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6SETUP AND WIRING
IMPORTANT! Charge for 8 hours minimum prior to placing into service. Do not leave AC disconnected. To avoid
battery damage, do not drain battery below 10.5VDC (12V nominal systems) or 21.0VDC (24V nominal systems).
Storage - recharge every 6 months or when open circuit battery voltage drops below 13.5VDC (12V nominal
systems) or 27.0VDC (24V nominal systems).
The unit is configured at the factory and requires no adjustments before operating. Refer to the label on the field
wiring end of the unit for alarm relay assignments. Communications settings are configured using the front panel
keypad (optional) or the SENS Setup Utility.
6.1. Wire Ratings
All wiring must comply with applicable codes and local ordinances. All power conductors should be rated
for use at 90°C or higher and 600V or higher. Alarm relay conductors and communications data cable
should be rated for use at 75°C or higher. The field wiring area is accessed by removing the field wiring
access cover (optional). Use conduit entry holes to route wires as needed.
CAUTION:
VOLTAGE ALWAYS PRESENT ON BATTERY TERMINALS!
6.2. Grounding Instructions
Unit must be grounded via grounded AC input connection to reduce risk of electric shock. The unit must
be connected to a grounded, metal, permanent wiring system, or an equipment-grounding conductor
(earthing conductor) must be run with the circuit conductors.
6.3. Sleep and Wake Up Buttons
To prevent battery discharge when AC power is not connected, press “SLEEP” button to turn off display
and communications (unit shipped from factory in SLEEP mode). Press “WAKE UP” button to turn display
and communications on when AC power is not connected. The internal battery is always connected to
the DC output terminals and will always be available to start an engine when the display and
communications are powered off.
WARNING:
PRESSING “WAKE UP” BUTTON WITHOUT AC CONNECTED WILL CAUSE
BATTERY DISCHARGE, CONNECT AC POWER AS SOON AS POSSIBLE!
Field wiring access
cover (optional)
1/2-inch conduit
knockouts

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6.4. DC Connection
Connect DC output conductors to the DC output terminals on the unit using ring lugs and M8 fasteners.
Always observe proper polarity of the DC output leads. Tighten connections to 60lb-in using a 13mm
socket wrench. Do not rely on threads for electrical connection; ensure connection to terminal surface.
Route DC wiring at least ¼ inch (6 mm) away from AC and alarm wiring. Optional –connect DC output
conductors to SAE battery terminal posts on models including posts instead of standard terminals.
See engine manufacturer recommendation for DC output conductor gauge and length between the 8Z
unit and the engine starter / DC bus.
WARNING:
BATTERY TERMINALS MUST BE COVERED
TO PROTECT AGAINST ELECTRICAL SHOCK!

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6.5. AC Connection
AC input voltage rated 100-240VAC, 50/60Hz. Connect an IEC 320 C13 locking power cord to the AC input
connector on the unit. Optional - wire AC input to locking screw terminal adapter provided with field
termination kit (18-14AWG, tighten to 3.5lb-in). Route AC wiring at least ¼ inch (6 mm) away from DC
and alarm wiring.
6.6. AC Pass-through
The AC pass-through IEC 320 C14 connection provides/passes-through the input voltage connected at
the AC input connection. Rated 750W maximum. Use for load sharing units or connecting SENS-approved
external devices.
6.7. Alarm Connections
See label on the field wiring end of the unit for original factory alarm relay assignments. Alarm relay
assignments are custom configurable using the SENS Setup Utility. Alarm circuits are rated 2A at 30V AC
or DC. Connect alarm wiring to the respective terminals on the pluggable terminal block on the unit. To
make wiring easier, the terminal block unplugs from its header. Pull terminal block straight out from
header to remove. Connect wires to terminal block by tightening screws at each position. After wires are
connected, plug terminal block securely back into header. Wire from FAIL or OK to COM depending on
whether the alarm should be present on an open or closed circuit. Connect alarm terminals only to low
voltage, limited energy (“Class 2”) circuits. The terminals accept 28-16 AWG (0.08-1.5 mm2) conductors.
Tighten connections to 2.0 Lb-In (0.22 Nm) using a small slotted driver. Route alarm wiring at least ¼ inch
(6 mm) away from DC and AC wiring.

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Position 1
Alarm Relay Connections
Wire from COM to OK for alarm present on open circuit or from COM to FAIL for present on closed circuit.
RELAY 1
Non-latching Coil
RELAY 2
Non-latching Coil
Relay Contacts
AC Fail
Charger Fail
Common
COM (Pos 1)
COM (Pos 4)
Open on alarm
OK (Pos 2)
OK (Pos 5)
Close on alarm
Defaults to FAIL with
no AC and DC power
(normally closed)
FAIL (Pos 3)
FAIL (Pos 6)
6.8. RS-485 Connection
Every unit includes RS-485 connections via a 4-pin pluggable terminal block. This interface is intended for
monitoring and communicating with the unit using Modbus. Connect wiring to the respective terminals
on the pluggable terminal block on the unit. To make wiring easier, the terminal block unplugs from its
header. Pull terminal block straight out from header to remove. Connect wires to terminal block by
tightening screws at each position. After wires are connected, plug terminal block securely back into
header. Wire connector position 1 for Modbus +D1 (A), position 2 for Modbus –D0 (B), position 3 for
COM and position 4 for Shield. The terminals accept 28-16 AWG (0.08-1.5 mm2) conductors. Tighten
connections to 2.0 Lb-In (0.22 Nm) using a small slotted driver. Route alarm wiring at least ¼ inch (6 mm)
away from DC wiring, AC wiring and low voltage wiring. See section 12 for further information on
Modbus operation and registers.
2 RELAYS,
3 POSITIONS PER
RELAY:
COM, OK, FAIL
PULL TO REMOVE
FROM HEADER

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Position 1
6.8.1. Termination
For proper operation, a 120-ohm terminator is required at the ends of the RS-485 bus. If multiple
devices are on the bus, only the devices on the ends of the network bus need termination
resistors. Termination may be provided as part of the network cabling or 120-ohm termination
plugs for the RJ-45 communications connector on the unit are available to order separately (SENS
p/n 803707). SENS units are slave devices. Pull-up and pull-down resistors are optional per
Modbus specifications. Below figure shows an example of how to terminate the network.
LT = Line Termination 120-ohm resistor
4 POSITIONS:
Pos 1: +D1 (A)
Pos 2: –D0 (B)
Pos 3: COM
Pos 4: Shield
PULL TO REMOVE
FROM HEADER

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17
PINOUT:
Pin 1: J1939 Data High
Pin 2: J1939 Data Low
Pin 8: Common (referenced to battery
negative)
Pin 1
6.9. Ethernet or SAE J1939
The unit is equipped with an RJ45 port for Ethernet Modbus TCP/IP or J1939 communications, depending
on model. See label below connector for indication of Ethernet or J1939 configuration.
6.9.1. Ethernet—Optional
Connect Cat5 or better ethernet cable. This provides a 10/100 ethernet connection. Ethernet
communication includes ethernet connectivity to the unit for monitoring via Modbus TCP/IP.
6.9.1.1. Configure TCP/IP Address
Configure TCP/IP settings using the SENS Setup Utility or the keypad. To adjust settings using
the keypad, ensure the access level is set to allow adjustments. Set the IP address as desired.
It may take up to 10 seconds for the network setting changes to apply. A TCP/IP address of
0.0.0.0 implies DHCP (Dynamic) addressing. Adjust the Gateway and Subnet Mask values as
required. The displayed Hardware Address is the MAC address corresponding to the Ethernet
interface. This value is not adjustable. See section 12 for further information on Modbus
TCP/IP operation and registers.
6.9.2. SAE J1939 (CANbus)—Optional
The J1939 interface provides a highly reliable, low-cost method of delivering to the genset
controller all information that NFPA 110 requires a charging system to deliver. To be operational,
the genset controller must support the unit J1939 connection. See section 11 for further
information on J1939 operation and registers.
J1939 communications are disabled by default and until the BCH address is configured (see
section 6.9.2.1). Connect J1939 communications using a twisted pair cable. Wire connector pin 1
for J1939 Data High, pin 2 for J1939 Data Low and pin 3 for Common. Communications are non-
isolated and referenced to negative battery terminal. An adapter from RJ45 to an 8-position
terminal block may be connected to the RJ45 connector and is available to order separately (SENS
p/n 208026).

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18
Pin 1
RJ45 to Terminal Block Adapter —Ordered Separately
6.9.2.1. J1939 Address (BCH)
Configure the J1939 address using the SENS Setup Utility or optional front panel keypad
(J9139 communications are disabled until this address is configured). J1939 supports two
units per network cable. Set to address 1 for main unit or address 2 for auxiliary unit. The
unit is set to address 1 by default.
6.9.2.2. Termination
For proper J1939 operation, a 120-ohm terminator is required at the ends of the J1939 bus.
If multiple devices are on the bus, only the devices on the ends of the network bus need
termination resistors. The unit is not equipped with terminators. Termination may be
provided as part of the network cabling or 120-ohm termination plugs for the RJ45
communications connector on the unit are available to order separately (SENS p/n 803707).
Use a splitter as needed in the RJ45 port on the unit to connect both the network cable and
terminator. Below figure shows an example of how to terminate the network.
6.10. SENSbus Connection
The unit is equipped with two SENSbus RJ45 ports. This connection is used to interconnect SENS specific
devices.
WARNING:
DO NOT PLUG ETHERNET INTO THIS CONNECTION

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6.10.1. Parallel/Load Share Connection—Optional
Multiple 8Z units may be connected in parallel to provide redundancy and increased capacity.
Connect a network cable from one unit to another using the SENSbus RJ45 port on each unit to
automatically initiate load sharing. For proper load share operation, a 120-ohm terminator is
required at both ends of the SENSbus connection. Connect DC outputs from each unit in parallel
to engine starter or DC bus. Connect AC input jumper from one unit to another using AC input
and AC pass-through connectors. Paralleling kits are available to order separately (SENS p/n
209665-20 for end-to-end mounting, p/n 209665-21 for side-by-side mounting).
6.10.2. Remote Alarm/Communications Panel Accessory Connection—Optional
The optional remote alarm/communications panel accessory provides the ability to adjust and
communicate with multiple units using one external device. The remote panel accessory may be
configured with different alarm relay assignments than the alarm relays native to the unit.
Connect a straight-thru splitter to the RJ45 SENSbus port on the remote panel. Place a 120-ohm
terminator in one of the positions on the remote panel splitter to ensure a terminator is located
at both ends of the communications bus. Connect the remote panel to the 8Z unit using a
network cable from the SENSbus RJ45 port on the unit to the remote panel splitter. Ensure a
terminator remains in another SENSbus RJ45 port on the 8Z unit.
6.11. USB Connection
The unit is equipped with a USB-C connector for monitoring and configuration via the SENS Setup
Utility.
6.12. Verify Connections
6.12.1. Verify that all connections are secure and in the proper locations. Tighten all unused screws on
terminal blocks to secure them against vibration.
6.12.2. Ensure all wires are routed in a way that the field cover or other objects will not pinch or damage
them.

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7START-UP PROCEDURE
7.1. Connect DC Output
Connect DC wires from 8Z unit to engine starter / DC bus (see section 6.4). The unit is configured at the
factory and requires no adjustments before operating.
7.2. Apply AC Power
Connect AC power to 8Z unit to start charging internal battery (see section 6.5). Charge for 8 hours
minimum prior to placing into service.
Depending on the battery state of charge, the unit may go into current limit upon initial AC connection.
In this case, the output voltage will be reduced as the internal charger operates in constant current
mode. As the battery is charged, the charging current demand will taper to a value below the current
limit setpoint and the internal charger will revert to constant voltage output. Operation will continue in
boost mode for a variable time ranging from a few minutes to several hours depending on state of
charge of the batteries.
WARNING:
DO NOT LEAVE AC DISCONNECTED.
TO AVOID BATTERY DAMAGE, DO NOT DRAIN BATTERY BELOW
10.5VDC (12V NOMINAL SYSTEMS) OR 21.0VDC (24V NOMINAL SYSTEMS).
7.3. Connect Alarms and Communications
Connect alarm and communications wiring (see section 6.7). Refer to the label on the field wiring end of
the unit for alarm relay assignments. Review and adjust alarm relay assignments and communications
settings using the front panel keypad (optional) or the SENS Setup Utility. See section 9.6 for additional
details on keypad navigation.