Multi-Zone Relay Module
HMZ-RM1 (PN #3015-6265)
Installation • Operation • Maintenance
EN 50270:2015
EN 50271
ROHS, REACH, Prop65
MET
Instruction P/N: 3015-6259
Rev. 0
April 2021
HMZ-RM1 Multi-Zone Relay Module
Table of Contents
1 INTRODUCTION ............................................................................................................................ 3
1.1 About This Manual ................................................................................................................... 3
1.2 Warning and Caution Conventions ..................................................................................... 3
1.3 Safety Precautions ...................................................................................................................... 3
1.4 Components .............................................................................................................................. 4
1.5 Dimensions ................................................................................................................................ 4
1.6 Specifications ........................................................................................................................... 5
2 INSTALLATION ............................................................................................................................. 5
2.1 Installation Considerations ................................................................................................... 5
2.1.1 Warnings and Cautions .................................................................................................. 5
2.1.2 Inspection ........................................................................................................................... 5
2.2 Wiring Diagram ......................................................................................................................... 6
2.3 Electrical Wiring ....................................................................................................................... 6
2.3.1 Horns/Strobes Wiring ...................................................................................................... 7
2.4 Communications Wiring ......................................................................................................... 8
2.4.1 Multi-Zone Communication Options ........................................................................... 8
2.5 Wiring (2) Relay Modules ....................................................................................................... 8
3 SETUP ............................................................................................................................................. 9
3.1 Enable Service Mode ............................................................................................................... 9
3.1.1 Quit Service Mode .......................................................................................................... 10
3.2 Relay (Rly) Module Setup Menu ......................................................................................... 11
3.3 Relay Module Setup ............................................................................................................... 12
3.4 Relay Setup .............................................................................................................................. 12
3.5 Communications (Comms) Setup Menu .......................................................................... 13
3.6 Communications Setup ........................................................................................................ 14
4 GENERAL OPERATION ............................................................................................................ 14
4.1 Functional Overview ............................................................................................................. 14
4.2 Relay Module Status & Faults ............................................................................................. 15
4.3 Fault Codes .............................................................................................................................. 16
5 MAINTENANCE ........................................................................................................................... 16
5.1 Cleaning .................................................................................................................................... 16
2 3015-6259 Rev 0
HMZ-RM1 Multi-Zone Relay Module
1 INTRODUCTION
1.1 About This Manual
This installation guide is intended to assist in the installation and configuration of the HMZ-RM1, Multi-Zone Relay Module.
The HMZ-RM1 is a sixteen channel relay expansion module that integrates with all Multi-Zone Gas Monitors (Firmware
4.00 and newer) and is used to power and control auxiliary horns and strobes for alarming purposes. The HMZ-RM1
interfaces to the Multi-Zone through RS-485 Modbus. The relay configuration is done through the Multi-Zone menu
system with each relay able to be assigned to any of the available Multi-Zone channels and can alarm at any of the alarm
levels (leak, spill, evacuation) and when a fault occurs. In failsafe mode, the module will also alarm when a loss of power
occurs. Each Multi-Zone can be connected to up to two HMZ-RM1 Relay Modules.
1.2 Warning and Caution Conventions
When used in this manual or as labeled on the relay module, the following hazard symbols and / or associated words are
defined as follows.
WARNING: This symbol and/or the use of the word WARNING indicates a potential hazard associated with the use of this
equipment. It calls attention to a procedure, practice, condition, or the like, which if not correctly performed or adhered to,
could result in death or serious injury.
WARNING: This symbol and/or the use of the word WARNING indicates a potential hazard from electrical shock. It calls
attention to a procedure, practice, condition, or the like, which if not correctly performed or adhered to, could result in death
or serious injury.
CAUTION: This symbol and/or the use of the word CAUTION indicates a potential hazard associated with the use of this
equipment. It calls attention to a procedure, practice, condition, or the like, which if not correctly performed or adhered to,
could result in minor or moderate injury.
IMPORTANT: The use of the word IMPORTANT in this manual calls attention to a procedure, practice, condition, or the
like, which if not correctly performed or adhered to, could result in incorrect performance of or damage to the equipment
and may void the warranty.
1.3 Safety Precautions
IMPORTANT: Before using this product, carefully read and strictly follow the instructions in the manual. Ensure that all
product documentation is retained and available to anyone operating the instrument. The protection provided by this
product may become impaired if it is used in a manner not specified by the manufacturer. Modifications to this
instrument, not expressly approved, will void the warranty.
CAUTION: This instrument is neither certified nor approved for operation in oxygen-enriched atmospheres. Failure to
comply may result in personal injury or death. Explosion hazard! Do not mount the Relay Module in an area that may
contain flammable fluids. Operation of any electrical equipment in such an environment constitutes a safety hazard.
CAUTION: In case of malfunction, DO NOT continue to use this equipment if there are any symptoms of malfunction or
failure. In the case of such occurrence, de-energize the power supply and contact a qualified repair technician or the
nearest Bacharach Service Center.
CAUTION: Use ONLY the provided gland plate for electrical and communication wiring. Drilling into the box will void
the warranty.
3 3015-6259 Rev 0
HMZ-RM1
A B C D E F Weight
External DC Power Terminal
Relay Power Jumper
(16)
Power
Supply
Relay Power LED
(16)
Relay Module Terminals
Circuit
Breaker
Status LEDs (3)
Horn/Strobe
Grounding
Terminals (18)
MODBUS DIP Switch
RS485
Connector
1.4 Components
HMZ-RM1 Multi-Zone Relay Module
1.5 Dimensions
Metric (mm) 300 400 150 360 345 440 10.0 kg
Imperial (in) 11.8 15.7 5.9 14.2 13.6 17.3 22 lbs
4 3015-6259 Rev 0
Recommended Wire Sizes
1.6 Specifications
HMZ-RM1 Multi-Zone Relay Module
Input Power
External Load Capacity
(Horns/Strobes)
Communications
Mounting Distance
100 – 240VAC, 50/60Hz, 4A
Protected by 5A fuse/breaker
24VDC, 60W total
INPUTS:
(1) RS-485 Modbus
OUTPUTS:
(16) General purpose, SPDT
relays, rated 24V 3A,
configurable
Adjacent
Remote up to 305 m (1,000 ft)
Mains power
Relays
Communications
2 INSTALLATION
Warm Up
Enclosure Rating
Third Party
Operating temperature -20 – 50 °C (-4 to 122 °F)
Operating Humidity
1.5 mm
0.75 – 0.25 mm
Belden cable #8762 or similar
30 seconds
Indoor Use Only, IP20
EN 50270, EN 50271, ROHS,
REACH, Prop65, MET
0 to 95% RH
(non-condensing)
2
(16 AWG) min.
2
(18-24 AWG)
2.1 Installation Considerations
2.1.1 Warnings and Cautions
WARNING: Under no circumstances should this product be operated without connection to a protective ground. Failure
to comply may result in a potential shock hazard and is a violation of electrical safety standards applicable to this
category of equipment.
WARNING: Always remove AC power before working inside the module enclosure and exercise extreme care when
accessing the products interior. Only qualified electrical maintenance personnel should perform connections and
adjustments.
WARNING: Electrical installation should be performed by a certified electrician, and should comply with all applicable
NEC / CEC and local electrical safety codes.
IMPORTANT: A certified AC power disconnect or circuit breaker should be mounted near the module and installed
following applicable local and national codes. If a switch is used instead of a circuit breaker, a properly rated
CERTIFIED fuse or current limiter is required to be installed as per local or national codes. Markings for positions of the
switch or breaker should state (I) for on and (O) for off.
2.1.2 Inspection
The Relay Module has been thoroughly inspected and tested prior to shipment from the factory. Nevertheless, it is
recommended that the module be re-checked prior to installation. Inspect the outside of the enclosure to make sure there
are no obvious signs of shipping damage. Open the enclosure and inspect the interior of the module for loose
components that may have become dislodged during shipment. If damage is discovered, please contact the nearest
Bacharach Service Center for assistance.
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HMZ-RM1 Multi-Zone Relay Module
2.1.3 Mounting Instructions
Dirt, grease, and oils can adversely affect the operation of the Relay Module. The module should be installed out of direct
sunlight in a clean, dry area that is not subject to temperature or humidity extremes. Installation of the module in a
mechanical room is acceptable provided reasonable environmental conditions exist. If there is a concern, consider
installing the unit outside of the mechanical room in a cleaner area of the facility.
1. The module must be mounted to a solid vertical surface or structure capable of supporting the stated weight. It
must be positioned where the door can be fully opened and in a location that facilitates easy service and
maintenance.
2. The module should be mounted using the mounting bracket kit provided. The bracket bolts are fed through the
back of the enclosure to the mounting bracket on the outside. See Section 1.1 for dimensional details.
3. Mounting hardware should be 4mm (1/8”) or 5mm (3/16”) screws or bolts minimum 40mm (1.5”) long with plain
washers and suitable wall plugs.
4. It is recommended that the module be located adjacent to the Multi-Zone Gas Monitor that it’s connected to. If this
is not feasible, the module can be mounted in a remote location.
2.2 Wiring Diagram
2.3 Electrical Wiring
Please see Section 1.6 power and electrical specifications.
The module is equipped with a gland plate, on the bottom of the enclosure, which can be modified in the field with conduit
openings/glands. The available gland plate area is 210mm W x 56mm D (8.27” W x 2.2” D). Prior to modification, remove
the gland plate by removing the (10) gland plate screws and the gland plate gasket. Once modifications are made, install in
the reverse order, ensure the gland plate gasket is properly seated and the gland plate screws are torqued to 1.5 – 2 Nm
(1.1 – 1.5 lbft).
Locate the AC input and ground terminals on the inside of the module. Secure the incoming AC power neutral (white/blue)
and live (black/brown) wires to the (+) and (-) terminals to the circuit breaker. Secure the AC ground (green) to the terminal
adjacent to the circuit breaker.
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HMZ-RM1 Multi-Zone Relay Module
DEFAULT
DRY CONTACT
2.3.1 Horns/Strobes Wiring
WARNING: DO NOT apply Mains voltage to relay terminals
Horns and strobes can be wired to any of the sixteen available relays in the module. Each relay includes NO (Normally
Open), COM (Common), and NC (Normally Closed) terminals (T1-16). Wire the horn or strobe to the appropriate
terminals for the desired contact type:
MODE RELAY TERMINALS
FAILSAFE (FS)
NON-FAILSAFE (NFS)
COMM-NC
COMM-NO
The red jumper (J1-16) can be moved to the V_RL and OPEN pins to allow the relay to operate as a dry contact.
External Vdc (+) External Vdc (-)
Externally derived power can also be applied to the relay output terminals to drive horns and strobes. The external source
cannot exceed 30VDC. To wire external power to the relay outputs, remove the red jumper on terminal block T18 by
loosening the terminal screws, wire the positive (+) of the external source to the lower terminal as shown above, and wire
the negative (-) of the external source to any available terminal on the grounding terminals (terminal block T20 – T25)
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HMZ-RM1 Multi-Zone Relay Module
2.4 Communications Wiring
The Relay Module can be connected to the Multi-Zone monitor using a shielded twisted pair instrument cable (See
Section 1.6 for more details).
Use the provided gland plate to install knockouts and gain access to the interior of the module (See Section 2.3).
2.4.1 Multi-Zone Communication Options
The Multi-Zone Gas Monitor has three available communications ports that can be utilized to connect to the Relay
Module:
PORT REQUIRED ACCESSORY
RS-485 (PORT 1)
RS-232C (PORT 2)
AUX RS-485 (PORT 3)
PN # 3015-6028, RS-232C to RS-485 Adapter Kit
PN # 3015-6027, RS-485 Lon Socket Adapter Kit
NONE
To free the other ports for additional MZ accessories and system integration, the Multi-Zone is set to communicate to the
Relay Module via the RS-232C port (RS-232C to RS-485 Adapter required). The port used to communicate with the Relay
module can be changed. See Section 3.5 and 3.6 for more details.
See Multi-Zone manual PN #3015-5074 for details on the available ports.
2.5 Wiring (2) Relay Modules
Up to (2) Relay Modules can be wired to a Multi-Zone Monitor.
Follow Section 2.3 and 2.4 for wiring guidance. Once the first Relay Module is installed, a second module can be installed
by running power to it in a similar fashion to the first module and daisy chaining the R485 terminals from the first module
to the RS485 terminals of the second module.
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HMZ-RM1 Multi-Zone Relay Module
3 SETUP
CAUTION: Ensure the Multi-Zone Monitor is in Service Mode prior to Relay Module setup. Failure to do so will prevent
access to parameters and the ability to save changed parameters.
All setup flow charts start from the Main Data Display Screen of the Multi-Zone monitor. Return to Main Data Display
Screen by pressing ESC.
UP
ENTER
KEYPAD
DOWN
ON-SCREEN OPTION
3.1 Enable Service Mode
The default Service Mode Duration is 15 minutes. Service Mode Duration can be changed from 1 – 300 minutes. See
Multi-Zone manual PN #3015-5074 for more details on Service Mode.
CAUTION: Multi-Zone must be in Service Mode to configure the Relay Module.
CAUTION: Service Mode cannot be enable when an alarm is active.
CAUTION: Service Mode must be exited or timeout for the Multi-Zone to resume functioning properly.
ENTER
CONFIRM
ENTER
▲
◄
►
▼
▲
SERVICE MODE
ENTRY
SYSTEM SETUP
ENTER
SERVICE MODE
3015-6259 Rev 0 9
3.1.1 Quit Service Mode
HMZ-RM1 Multi-Zone Relay Module
▲
▲
◄
►
▼
SYSTEM SETUP
IN SERVICE
QUIT
ENTER
ENTER
SERVICE MODE
CONFIRM QUIT
ENTER
3015-6259 Rev 0 10
3.2 Relay (Rly) Module Setup Menu
HMZ-RM1 Multi-Zone Relay Module
▲
SYSTEM
SYSTEM SETUP
ENTER
ENTER
▲
◄
►
▼
▼
3015-6259 Rev 0 11
RELAY MODULE
SETUP
MORE
ENTER
ENTER
HMZ-RM1 Multi-Zone Relay Module
Select to configure all relays on Enabled Relay Modules.
RLY
ZONE
TRIG
STATE
A01
Z01
EVAC
NORMAL
A02
Z02
EVAC
NORMAL
A03
Z03
EVAC
NORMAL
A04
Z04
EVAC
NORMAL
A05
Z05
EVAC
NORMAL
A06
Z06
EVAC
NORMAL
A07
Z07
EVAC
NORMAL
A08
Z08
EVAC
NORMAL
A09
Z09
EVAC
NORMAL
A10
Z10
EVAC
NORMAL
A11
Z11
EVAC
NORMAL
A12
Z12
EVAC
NORMAL
ZONE
TRIG
STATE
3.3 Relay Module Setup
See Section 3.2 to enter Relay (Rly) Module Setup Screen.
Default: DISABLED
Select to Enable/Disable Relay Module
Options: ENABLED, DISABLED
Default: Module A: 10, Module B: 20
Set Relay Module Modbus ID
Options: 10 – 80
(Module A and B cannot be the same address)
Default: FAILSAFE
Set Relay Module as Failsafe/Non-Failsafe
Options: FAILSAFE, NON-FAILSAFE
(See Section 2.3.1)
Select Communication Port for Relay Module
Options: 1 (RS485), 2 (RS232), 3 (AUX485)
Default: 2
NAVIGATE / TOGGLE
SELECT / SAVE
(See Section 3.4 for more detail)
3.4 Relay Setup
See Section 3.2 to enter the Relay (Rly) Module Setup Screen. Each Relay Module is equipped with sixteen
programmable relays. Relay Module A, Relay 2 (A02) shown below. The first twelve relays are shown when accessing the
Relay Setup Screen. Default relay settings shown below.
See Multi-Zone manual PN #3015-5074 for more information on zones and TRIG alarms.
IMPORTANT: Press ► or ◄ to toggle between RLY A SETUP (Module A) and RLY B SETUP (Module B), if multiple Modules
are wired to the Multi-Zone monitor
IMPORTANT: When ANY is selected for a zone, the relay state will change when any zone’s TRIG criteria has been met
RLY A SETUP
Default: NORMAL
Shows current relay state
Options: NORMAL, ACTIVE
Default: Relay 2 (A02) = Zone 2 (Z02)
Select Zone corresponding to relay
Options: Z01-Z16, ANY, NONE
3015-6259 Rev 0 12
3 secs to test
Default: EVAC
Select alarm/fault that triggers relay
Options: EVAC, SPILL, LEAK, FAULT
3.5 Communications (Comms) Setup Menu
HMZ-RM1 Multi-Zone Relay Module
▲
SYSTEM
SYSTEM SETUP
ENTER
ENTER
▲
◄
►
▼
▼
3015-6259 Rev 0 13
COMMS SETUP
MORE
ENTER
ENTER
HMZ-RM1 Multi-Zone Relay Module
MULTI-ZONE
RELAY MODULE DIP SWITCH
GREEN
STEADY
Power applied to Module
AMBER
FLASHING
Heartbeat, once per second
RED
STEADY
Fault or Loss of Communications
3.6 Communications Setup
Default Relay Module Modus Parameters shown. See Multi-Zone Manual PN #3015-5074 for more information.
NAVIGATE / TOGGLE
SELECT / SAVE
4 GENERAL OPERATION
4.1 Functional Overview
CAUTION: Once a relay module is enabled and connected to a Multi-Zone monitor is cannot be easily
disable/disconnect. Please contact Bacharach Product Support for additional assistance.
By way of a RS485 connection, the Multi-Zone Relay Module expands the available alarm relays of the Multi-Zone Gas
Monitor from (4) to (36) relays with a maximum of (2) modules per monitor. With a possibility of (32) additional relays, a
multitude of horns and strobes can be deployed throughout a facility to readily alert personnel to a leak or fault
occurrence.
Once operational, the Relay module communicates visually to the user via LED lights on the Relay Module board.
LED COLOR STATE DESCRIPTION
FLASHING Communication Received/Transmitted
3015-6259 Rev 0 14
1 2 1
Available when there is a fault active on any relay
4.2 Relay Module Status & Faults
HMZ-RM1 Multi-Zone Relay Module
The Relay Module must be enabled to view Module Status and Faults. Status and fault displays below are shown with
Relay Module A enabled and Relay Module B disabled. Voltage
Details
2
can be viewed from these menus. See Section 3 for Iconography.
SYSTEM SETUP
SYSTEM
▲
ENTER
1
, Temperature1, Modbus1, Fault Codes1, and Fault
ENTER
▲
◄
►
▼
MORE
ENTER
MORE
RLY MODULE
▼
▼
ENTER
MORE
SETUP
ENTER
ENTER
3015-6259 Rev 0 15
HMZ-RM1 Multi-Zone Relay Module
Firmware Fault
<0001>
Error detected in firmware
Voltage out of specification 3.3V
<0002>
3.3V out of range
Temperature Fault
<0020>
Measured temperature is outside of limits
RAM Integrity Fault
<0040>
Error detected during RAM test
SPARE PARTS
PART NUMBER
DESCRIPTION
3015-6256
Circuit Breaker, 2-Pole, 4A, 250V
3015-6254
Power Supply, 24V
4.3 Fault Codes
See Section 4.2 to access Relay Module Status and Faults
FAULT CODE DESCRIPTION
Voltage out of specification 24V <0004> 24V out of range
Relay Fault <0008> Relay state does not match expected state
Modbus Fault <0010> Error detected in Modbus communications
5 MAINTENANCE
A technician with the use of readily available hand tools and factory provided instructions can perform basic diagnostics,
replace subcomponents, and confirm proper operation before putting the unit back into service. Field upgrade is possible
with proper equipment.
3015-6251 Relay Board
5.1 Cleaning
When required, cleaning of the HMZ-RM1 should be performed using a clean, dry cloth on the outside of the enclosure.
To avoid shock hazard and/or equipment damage, DO NOT use soap and water.
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HMZ-RM1 Multi-Zone Relay Module
WARRANTY
Bacharach, Inc. warrants to Buyer that at the time of delivery this Product will be free from defects in material and
manufacture and will conform substantially to Bacharach Inc.’s applicable specifications. Bacharach’s liability and Buyer’s
remedy under this warranty are limited to the repair or replacement, at Bacharach’s option, of this Product or parts thereof
returned to Seller at the factory of manufacture and shown to Bacharach Inc.’s reasonable satisfaction to have been
defective; provided that written notice of the defect shall have been given by Buyer to Bacharach Inc. within two (2) years
after the date of delivery of this Product by Bacharach, Inc.
Bacharach, Inc. warrants to Buyer that it will convey good title to this Product. Bacharach’s liability and Buyer’s remedy
under this warranty of title are limited to the removal of any title defects or, at the election of Bacharach, to the replacement
of this Product or parts thereof that are defective in title.
The warranty set forth in Paragraph 1 does not apply to parts that the Operating Instructions designate as having a limited
shelf-life or as being expended in normal use (e.g., filters).
THE FOREGOING WARRANTIES ARE EXCLUSIVE AND ARE GIVEN AND ACCEPTED IN LIEU OF (I) ANY AND ALL
OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE: AND (II) ANY OBLIGATION, LIABILITY, RIGHT,
CLAIM OR REMEDY IN CONTRACT OR TORT, WHETHER OR NOT ARISING FROM BACHARACH’S NEGLIGENCE,
ACTUAL OR IMPLIED. The remedies of the Buyer shall be limited to those provided herein to the exclusion of any and all
other remedies including, without limitation incidental or consequential damages. No agreement varying or extending the
foregoing warranties, remedies or this limitation will be binding upon Bacharach, Inc. unless in writing, signed by a duly
authorized officer of Bacharach.
Register your warranty by visiting
Product improvements and enhancements are continuous; therefore the specifications and information contained in this
document may change without notice.
Bacharach, Inc. shall not be liable for errors contained herein or for incidental or consequential damages in connection
with the furnishing, performance, or use of this material.
Copyright © 2021, Bacharach, Inc., All Rights Reserved
No part of this document may be photocopied, reproduced, or translated to another language without the prior written
®
BACHARACH
is a registered trademark of Bacharach, Inc. All other trademarks, trade names,
service marks and logos referenced herein belong to their respective owners
www.mybacharach.com
consent of Bacharach, Inc.
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HMZ-RM1 Multi-Zone Relay Module
3015-6259 Rev 0 18
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