ACS-CRM
CONTROL AND MONITORING MODULES FOR USE WITH THE RAYCHEM ACS-30 SYSTEM
INSTALLATION INSTRUCTIONS
DESCRIPTION
A
The ACS-CRM provides ground-fault and line current sensing,
alarming, switching and RTD inputs for five heat-tracing circuits
when used with the ACS-UIT2. The ACS-CRM is used to control
Electromechanical Relays (EMRs) when installed in the ACS-PCM2-5
power control panel.
TOOLS REQUIRED
• Wire cutters
• RJ11 stripping/crimping tool
• RJ11 connectors
• #36 drill bit
• Screwdriver small blade - standard
• #6-32 tap
B
ADDITIONAL MATERIALS REQUIRED
• Power supply - 12 Vdc @ 400 mA
• RJ11 4 conductor cable
KIT CONTENTS
ItemQty Description
APPROVALS/CERTIFICATIONS
Hazardous Locations
Class I, Div. 2, Groups A,B,C,D
Ex nC IIC T5
Class I, Zone 2, AEx nC IIC T5
General
Supply Voltage
Internal power consumption
Ambient operating temperature
Ambient storage temperature
Environment
Max. altitude
Humidity
A
1
ACS-CRM (card rack module with connectors)
B
1
NGC-30-CTM (current transformer module)
Line Current Sensors
12 Vdc ± 10%
< 5 W per ACS-CRM
–40ºF to 140ºF (–40ºC to 60ºC)
–40ºF to 167ºF (–40ºC to 75ºC)
PD2, CAT III
2000 m
0 – 90% non-condensing
Max current
Accuracy
60 A
± 2% of reading
Ground Fault Sensor
Range
Accuracy
10 – 200 mA
± 4% of range at 30 A line current
Outputs
CRM output relays Alarm Relay
Electromagnetic Compatibility
Form A 3-Amp @ 277 Vac max 50/60 Hz
Form C 3-Amp @ 277 Vac max 50/60 Hz
Immunity
Heavy Industrial
Emission
Industrial Environment
Communication to ACS-UIT
100-ohm platinum RTD, 3-wire,
α = 0.00385 ohms/ohm/ºC
Can be extended with a 3-conductor shielded
cable of 20 ohm maximum per conductor
Up to five wired directly to each ACS-CRM
Connection Terminals
Temperature Sensors
Type
Quantity Current Sensors
Mounting
Quantity per NGC-30-CTM
Din Rail – 35 mm
Five for ground-current measurement
Five for line current measurement
Type Cable Length Quantity 2 wire RS-485
One shielded twisted pair
4000 ft. (1200 M) maximum
Up to 52* ACS-CRM may be connected
to one ACS-UIT
Power supply/Pilot Relay/ 18 – 12 AWG (0.8 – 3.3 mm2)
RTD/Comm Port (RS485)
* May require an RS-485 repeater if communication length is greater than 4000 ft.
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.
THERMAL BUILDING SOLUTIONS
• Component approvals and performance are based on the use of
Pentair Thermal Management-specified parts only. Do not use
substitute parts.
• Keep components dry before and during installation.
EN-RaychemACSCRM-IM-H58283 03/15
• Leave these instructions with the end user for reference and
future use.
For technical support, call Pentair Thermal Management at
(800) 545-6258.
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Cleaning Instructions
Optional Card Rack Installation Instructions
If dust accumulates on the ACS-CRM circuit board use compressed air to remove the dust. Turn off all power to the ACS-30
panel. Carefully disconnect all cables from a single ACS-CRM
card, making sure to label cables so that they can be reconnected
after board cleaning. Wear an anti-static wrist strap connected to
ground in order to avoid component damage. Remove the CRM circuit card from the card cage and place on a clean lint-free surface.
Use dry compressed air from a can for cleaning circuit boards.
(Avoid factory compressed air since it may contain enough moisture or oil to cause permanent damage.) Use short quick blasts
to remove dust build-up as necessary. After cleaning, replace the
CRM in the same card cage position and reconnect all cables.
Remove only one card at a time for cleaning to avoid any problems
during re-installation.
Mounting of Card Rack
Use the mounting template shown in the NGC-30-CRM Installation Instructions (H57723) to mount the rack on a panel backplane.
There are four holes (0.188 in. diameter) to secure it to the mounting surface using #8 screws.
Once the card rack is installed, a earth bonding wire (green 18
AWG min.) terminated with a #10 Ring terminal must be connected to the card rack using the ground screw provided.
Note: The card rack must
be installed on a noncombustible surface.
10.97"
(279 mm)
7.20"
(183 mm)
11.15"
(283 mm)
Mounting the ACS-CRM Directly to the Panel's Back Pan
The ACS-CRM is intended to be installed on the backpan of the
ACS-PCM2-5 power control panel.
Grounding
screw
Note:
Screw is located
on the outside of
the enclosure
Use the attached template (see page 7) to locate the 6 mounting
holes on the panel’s back pan. Using a #36 drill bit, drill the six
holes and using a #6-32 tap, tape the 6 holes.
Install a #6 nylon standoff (1 in. long) between the panel’s back pan
and CRM board and secure with the #6-32 screw (1 1/4 in. long).
ACS-CRM Installation Instructions
ACS-CRM

MSB
LSB

TB 1
TB 2
TB 3
TB 4
TB 5
TB 13
TB 14
TB 15
TB 16
TB 17
1 2 3
TB 19
THERMAL BUILDING SOLUTIONS
Tx
Relay 5
Relay 3
Alarm output
Relay outputs (5x)
LEDs (9x)
Fuse
12 Vdc Inputs (2x)
End of Line (EOL) jumper
RS-485 Communications
Line & ground-fault sensor
inputs (5x)
 RTD Inputs
 Address Switches









Rx
  
Relay 1

Relay 4

Power
TB 6
Alarm
TB 7
Relay 2
TB 12
LED functions
7.00 in.
(178 mm)
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10.75 in.
(273 mm)
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1
2 1
Common Alarm
The common alarm terminal block (TB12)
provides a form C dry contact, rated at 277
Vac max (3A).
2
When the Raychem ACS-PCM2-5 panel is
powered on, the common alarm relay coil
is energized and pin 2 is connected to pin 1
(common). This is the "No Alarm" condition
for the CRM board.
Note: Power supply must be sized correctly
based on the number of ACS-CRM modules.
RS-485 Communications
The RS-485 connector (TB6) is a dual three pin
connector. Either connector allows for RS-485
input signals (pin #1 (shield), pin #2 (+), pin #3
(–)) and bussing of RS485 signal to other ACSCRM modules.
End of Line (EOL) Jumper
If this device (ACS-CRM) is the last device in
the RS-485 network, the J1 jumper needs to
be moved from terminals 2 & 3 to terminals
1 & 2.
If the alarm occurs, or the CRM board loses power, the relay coil is
de-energized and pin 1 (common) is disconnected from pin 2 and
connected to pin 3 to indicate an alarm condition exits.
1 2 3
Normal
position
1
2
3
1 2 3
End of Line
position
1
2
3
RTD Inputs –
­ Ordinary Area
3 wire RTDs with shield may be connected to
RTD Ch1 thru Ch 5 (TB1 - TB5). The two
common wires (usually red, red) are connected to terminals 2 & 3, the source (usually
white) to terminal 1 and the braid to terminal
1 2 3 4
4 (earth ground).
per each ACS-CRM board
Note: RTD's are not required if monitoring
current/ground-faults only or if RTD's are
connected via RMM2s.
Address Switches (SW1 & SW2)
Each ACS-CRM must have a unique communication address selected. The valid
address switch range when using the ACSUIT is 1-99. SW1 is the ones digit (0–9) and
SW2 is the tens digit (0 or 9).
RTD
RTD
RTD
RTD
Relay "No Alarm"
Note: When adding an ACS-CRM to the sysCondition
tem, you must first cycle power on the CRM
board and then perform a network update at the ACS-UIT.
Ground-Fault/Line Current Sensors
Connections from ACS-CRM to
NGC-30-CTM.
Using an RJ11 connector/cable assembly,
connect one end to an RJ11 input (TB13TB17) and the other end to the appropriate
NGC-30-CTM RJ11 connector.
Typical connection
(1 of 5)
RTD connected directly to CRM board
RTD
1 2 3
COM
Closed
Open
Power Supply
The power supply connector (TB19) is a dual
two pin connector. Either connector allows
for power in (pin #1 (+), pin #2 (–) and bussing of power to other ACS-CRM modules).

1
2
3
4
Shield
1
2
3
4
Shield
1
2
3
4
Shield
1
2
3
4
Shield
1
2
3
4
Shield
RTD1
RTD2
RTD3
RTD4
CRM
PCB
Ground-Fault/Line Current Cable Assembly
Notes: A complete cable may be ordered as part number: 20578010XXX where XXX = Length (L) in inches.
RTD5
Chassis Ground
(L)
THERMAL BUILDING SOLUTIONS
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Mounting of NGC-30-CTM
Each NGC-30-CTM mounts on a DIN 35 rail. It should
be located between the terminal block and contactor in
the ACS-PCM2-5 power control panel.
DIN rail
mounting
foot
DIN rail
mounting
foot
DIN rail
NGC-30-CTM Installation Instructions
NGC-30-CTM
 Line & ground-fault sensor outputs (5x)
 Line current sensor (5x)
 Ground-fault current sensor (5x)
DIN rail
mounting foot
(X2)
Typical GF / LC wiring through transformers
Ground-fault transformer
Phase / Neu.
Line current transformer
Phase
3.5 in
(89.9 mm)
9.75 in
(248 mm)
top of
DIN rail
DIN rail
THERMAL BUILDING SOLUTIONS
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System Layout ACS-CRM
ACS-PCM2-5
120 - 277 Vac in
ACS -UIT2
Touch
Screen
12 Vdc
Power
Supply
RTDs
ACS-CRM
Alarm relay output
AC voltage up to 277Vac
+
–
12 Vdc
Distribution panel board
with standard ci
rcuit breakers
To contactor coils
(see detail)
NGC-30-CTM
C
Ø1 Ø2 Ø3 N
Relay drivers
1
2
3
4
5
3
C
8
C
10
C
12
C
6
C
Pilot relays Contactor
located on
coils
circuit board
THERMAL BUILDING SOLUTIONS
C
To heater's
power junction box
1
C
C
C
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General Installation Instructions
1. The Raychem ACS-30 components must be installed:
• In compliance with all local electrical and safety codes
• In an enclosure suitable for the application environment.
2.The Raychem ACS-30 components must be protected by external
overcurrent and disconnect devices. This may be a circuit breaker
or a combination of disconnect switch and fuses.
The disconnect device:
• Must disconnect all ungrounded, current-carrying conductors
• Should be located in close proximity to the equipment
• Be within easy reach of the operator
• Be marked as the disconnecting device for the equipment
3. Supply wiring insulation must be rated for the highest voltage
and temperature to be encountered in the application. Conductors must be sized for the application and be protected by an
external overcurrent device.
4. Some wiring configurations will use more than one power
source and all must be de-energized prior to performing any
maintenance on a controller circuit.
5. Protection provided by this equipment may be impaired if the
device is used outside of its ratings or for applications other than
is intended.
6. Always be sure that the intended location is classified as an
area for which the product is approved.
7. The Raychem ACS-30 components have no user serviceable parts.
Contact your Pentair Thermal Management Representative for
service and a Return Authorization if required.
Conducted and Radiated Emissions - Statement Of Compliance
This equipment has been tested and found to comply with the limits
for a Class A digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment
generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio
or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
– Reorient or relocate the receiving antenna.
– Increase the separation between the equipment and receiver.
– Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
– Consult the dealer or an experienced radio/TV technician for help.
This Class A digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la Classe A conforme à la norme NMB003 du Canada.
ACS-30 Installation Test Procedures
Once assembled into a panel, the Raychem ACS-PCM2-5 components must be tested as a system to ensure that the ground fault detection circuitry is functional. The following tests must be conducted
by qualified personnel familiar with the equipment and its operation,
test procedures, and electrical code requirements.
Make as many copies of this checklist as required to document
successful tests for each circuit in the panel.
Abbreviations:
GF = Ground Fault
CT = Current Transformer
ACS-CRM Board:
Tested By:
Date:
Circuit #1 Circuit #2 Circuit #3 Circuit #4 Circuit #5
Inspect the wiring to ensure that all load conductors pass through the GF CT.
Verify that no ground (PE) conductors pass through the GF CT.
Ensure that conductors on the load side of the GF CT are not grounded.
Simulate a GF on the load side of the GF CT large enough to cause the ACSCRM or ACS-CRMS to trip its output off. This should occur within approx. 1
second of applying the test GF current.
Completed forms should be retained with the panel and available for inspection by the local Electrical Inspection Authority.
THERMAL BUILDING SOLUTIONS
EN-RaychemACSCRM-IM-H58283 03/15
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0.17 in.
10.53 in.
5.35 in.
7.0 in.
ACS-CRM
Mounting holes
6x ø 0.15 in.
6.83 in.w
EN-RaychemACSCRM-IM-H58283 03/15
THERMAL MANAGEMENT
BUILDING SOLUTIONS
SOLUTIONS
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