nVent RAYCHEM RMM3 Bedienungsanleitung Seite 4

ENGLISH
EN
DE
WARNING: This component is an electrical device. It must be
installed correctly to ensure proper operation and to prevent
FR
frozen pipes, shock or fire. Read and carefully follow all the
installation instructions.
RU
If the equipment is used in a manner not specified by the
installation manual, the protection provided by the equipment may
be impaired.
US CANADA Only
For field-wiring, use copper wire only with minimum temperature
rating 70°C. Use 20-14 AWG for the power inputs. Use 30-12 AWG for
other terminals. Maximum torque 0.5 Nm.
Special conditions for safe use:
• The equipment shall only be used in an area of at least
pollution degree 2, as defined in IEC/EN 60664-1.
• Open type equipment shall be installed in an enclosure with
a tool removable door or cover that provides a degree of
protection not less than IP54 in accordance with IEC/EN
60079-0.
• Provisions shall be made to prevent the rated voltage from
being exceeded by transient disturbances of more than 140%.
Specifications
RMM3 supply voltage
(nominal):
RMM3-24VDC supply
voltage (nom.):
Power consumption:
Ambient operating range: –40°C to +60°C
Relative humidity:
Altitude:
Environment:
Protection:
Temperature sensors:
Temperature coefficient: per IEC 751-1983 (100 Ω at 0°C)
Sensor input wire
connections:
Sensor connections:
RS-485 connections:
Replaceable fuse:
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4 nVent.com/RAYCHEM
115/230 Vac, ±10%, jumper selectable,
50/60 Hz, default setting: 230 V
24 Vdc nominal, min 10 Vdc,
max 30 Vdc
2,5 VA
5 to 95%, noncondensing
Up to 2000 m
Pollution Degree 2, Overvoltage
Category II
Must be installed within IP54 / Type
4X or better enclosure when installed
outdoor
3-wire RTD (PT 100)
3 x 1.5 mm cable
2
Can be extended with a 3-core
shielded cable of 20 Ω max.
per conductor, maximum length
150 m (can differ on proper
installation, insulation and cable
shielding)
Shielded, single twisted pair,
max. 1200 m
1) T 50 mA/250 V for RMM3: Littlefuse
Series 372 TR5 50mA
2) F 200 mA/250 V for RMM3-24VDC:
Wickmann
Installation materials (not supplied)
Fasteners
4 screws for 6.5 mm holes for mounting enclosures
PT 100 temperature sensors (RTDs)
MONI-PT100-NH Temperature sensor for non-hazardous
areas with M20 cable gland
MONI-PT100-EXE Temperature sensor for hazardous areas
Installation instruction
Description
The nVent RAYCHEM Remote Monitoring Module (RMM3) is part
of the nVent RAYCHEM NGC control and monitoring system.
The RMM3 accepts inputs from up to 8 RTDs (3 wire PT 100
temperature sensors) measuring pipe or ambient temperature in a
trace heating system.
For technical assistance, call your local nVent representative or
the nVent service center listed on the last page.
Parts (supplied)
The RMM3 is available as:
• Single module without enclosure
• RMM3 Heat tracing Remote Monitoring Module
• Replacement fuses
• Jumper for voltage selection
• Label
Installation and configuration procedure for the RMM3
Modbus communication settings
The RMM3 module has by default the following communication
parameters
Protocol Modbus RTU (RS485)
Modbus address 32
Baud rate 9600 Baud
Bits 8 bits
Parity no parity
Stop bits 2
Tx delay 5 mS
The communication settings can be changed when required.
Please contact nVent for further details.
1. Modbus address
The Modbus address is set via 2 hexadecimal rotary switches.
ADDR H is setting the high address number; ADDR L is for the low
address number. See appendix A for detailed information.