RMM2
Heat-Tracing Remote Monitoring Module for the nVent RAYCHEM NGC Control System
Installation Instructions
DESCRIPTION
The nVent RAYCHEM remote monitoring module (catalog no.
RMM2) is part of the RAYCHEM NGC Control System. The
RMM2 takes inputs from up to 8 RTDs that measure pipe, vessel,
or ambient temperatures in a heat-tracing system. Multiple
RMM2 units communicate with a RAYCHEM NGC controller
using a single RS-485 bus (a shielded, twisted pair).
Refer to the specific RAYCHEM NGC controller Installation and
Operation manual for additional information. For technical
support call nVent at (800) 545-6258.
MONITORING SYSTEM COMPONENTS AND ACCESSORIES
RMM2
RMM2 module without enclosure (for use with user-
supplied enclosures.)
RMM2-4X
Reinforced polyester Type 4X enclosure with RMM2,
grounding hardware and four plugs. For Ordinary and
Division 2 hazardous locations.
Additional Materials Required
User supplied
enclosure
Agency-approved enclosure fitted with an aluminum
DIN 35 rail and grounding hardware. For Ordinary and
Division 2 hazardous locations only.
RTDs
For measuring temperatures. Make RTD selection
based on temperature range of heat-tracing
application. Up to eight three-wire RTDs may be used.
Extension wire
MONI-RTD-WIRE Shielded cable with three 22 AWG wires;
PVC insulation; for use as RTD lead wire. 1000 ft reel.
MONI-RS485-
WIRE
Shielded cable with twisted pair of 22 AWG wires;
PVC insulation; for use as RS-485 bus. 1000 ft reel.
Conduit drain
JB-DRAIN-PLUG-
3/4IN
PN 278621 (recommended for Division 2 locations)
TOOLS REQUIRED
• 3 mm slotted screwdriver
• Needle nose pliers
• 3/8 hex key (for RMM2-4X only) • Wire stripper/cutter
APPROVALS
Type NM
Nonhazardous locations
LISTED
80BJ ENERGY MANAGEMENT
EQUIPMENT SUBASSEMBLY AND
GENERAL SIGNALING
EQUIPMENT SUBASSEMBLY
Hazardous locations
LISTED
9Z63 TEMPERATURE
INDICATING EQUIPMENT
FOR USE IN HAZARDOUS
LOCATIONS
RMM2-4X (RMM2 with Type 4X Enclosure)
Class I, Division 2, Groups A, B, C, D
Class II, Division 2, Groups F, G
KIT CONTENTS
Item Qty Description
A
1
RMM2 module
B
2
Spare fuses - 200 mA 250 V
C 2 Jumpers (Use 2 jumpers for 115 V or 1 jumper for 230 V)
D
1
Product label (for user supplied enclosures only)
1
Enclosure - not shown (for RMM2-4X only)
(RMM2-4X shown)
WARNING:
This component is an electrical device that
must be installed correctly to ensure proper
operation and to prevent shock or fire. Read
these important warnings and carefully follow
all of the installation instructions.
• Component approvals and performance are
based on the use of nVent -specified parts
only. Do not use substitute parts.
• Keep components dry before and during
installation.
•
NOTE:
Leave these instructions with the end
user for reference and future use.
A
B
C
D
