USER GUIDE
SCC-RLY01 Relay Module
The SCC-RLY01 contains one single-pole double-throw (SPDT)
nonlatching relay capable of switching 5 A at 30 VDC when using an
SC-2345 or SC-2350, or 250 VAC when using an SCC-68. Any single
E/M Series DAQ device digital input/output (P0) line 0 to 7 can control the
SCC-RLY01.
The SCC-RLY01 uses positive logic. A digital high sets the relay, and
a digital low resets it. In the set state, the common (COM) contact is
connected to the normally open (NO) contact. In the reset state, the
common (COM) contact is connected to the normally closed (NC) contact.
Conventions
The following conventions are used in this guide:
<>
Angle brackets that contain numbers separated by an ellipsis represent
a range of values associated with a bit or signal name—for example,
P0 <3..0>.
»
The » symbol leads you through nested menu items and dialog box options
to a final action. The sequence File»Page Setup»Options directs you to
pull down the File menu, select the Page Setup item, and select Options
from the last dialog box.
This icon denotes a note, which alerts you to important information.
This icon denotes a caution, which advises you of precautions to take to
avoid injury, data loss, or a system crash. When this symbol is marked on
the product, refer to the Read Me First: Safety and Radio-Frequency
Interference document, shipped with the product, for precautions to take.
When symbol is marked on a product, it denotes a warning advising you to
take precautions to avoid electrical shock.
When symbol is marked on a product, it denotes a component that may be
hot. Touching this component may result in bodily injury.
–
–
Documentation for your hardware
Documentation for your software
❑ Tools
–
–
–
1/8 in. flathead screwdriver
Numbers 1 and 2 Phillips screwdrivers
Wire insulation stripper
You can download NI documents from ni.com/manuals. To download
the latest version of NI-DAQ, click Download Software at ni.com.
Note Configuring the SCC system using Measurement & Automation Explorer (MAX) is
not supported on the Macintosh operating system.
Device Specific Information
Note For general SCC module installation and signal connection information, and
information about the SCC-68 or SC-2345 carrier, refer to the SCC Quick Start Guide,
available for download at ni.com/manuals.
Installing the Module
Caution Refer to the Read Me First: Safety and Radio-Frequency Interference document
before removing equipment covers or connecting/disconnecting any signal wires.
Plug the SCC-RLY01 into any DIO socket J(X+9), where X is 0 to 7, on the
SC-2345, or into any of the four slots that correspond to P0.0 to P0.3 on the
SCC-68.
Connecting the Input Signals
Note The signal names have changed. Refer to ni.com/info and enter rdtntg
to confirm the signal names.
Each screw terminal is labeled by pin number <1..3>. Pin 1 is the
NC terminal, pin 2 is the COM terminal, and pin 3 is the NO terminal.
The SCC-RLY01 contains one SPDT relay controlled by the digital line of
an E/M Series DAQ device P0. line X. The value of X is determined by the
number of the DIO socket, J(X+9) on the SC-2345 or SCC Mod (X + 1) on
the SCC-68, where you plug in the SCC-RLY01. Figure 1 shows a circuit
diagram of the SCC-RLY01.
© National Instruments Corporation
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SCC-RLY01 Relay Module User Guide
E/M Series
SCC-RLY01
NO
+5 V
3
2
1
390 Ω, 1/4 W
P0.(X )
COM
NC
D GND
Figure 1. SCC-RLY01 Circuit Diagram
Caution When connecting signals >60 VDC to the SCC-RLY01 module in the SCC-68,
you must use the high-voltage backshell. Figure 2 shows the high-voltage backshell.
Figure 2. High-Voltage Backshell
For information about how to configure the SCC-RLY01 module with
NI-DAQmx, refer to the SCC Quick Start Guide.
Specifications
These ratings are typical at 25 °C unless otherwise stated.
Electrical
Contact type............................................SPDT (Form C), nonlatching
Nominal switching capacity
SCC-68 ............................................5 A at 250 VAC
5 A at 30 VDC
SC-2345...........................................5 A at 30 VAC
5 A at 30 VDC
SCC-RLY01 Relay Module User Guide
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Caution The SCC-RLY01 module is derated to 30 V maximum switching voltage in the
SC-2345 carrier regardless of any other voltage markings found on the SCC-RLY01
module case.
Signal bandwidth.................................... DC to 400 Hz
Contact resistance .................................. 30 mΩ max
Switching time
Operate time (NC to NO)................ 5 ms (10 ms max)
Release time (NO to NC)................ 4 ms (5 ms max)1
Maximum operating speed..................... 30 cps at rated load
Contact lifetime...................................... 5 × 107 operations at 180 cpm
(minimum)
Power Requirement
Digital power.......................................... 300 mW max
+5 V........................................................ 60 mA max
Physical
1.87 cm
(0.74 in.)
7.93 cm
(3.12 in.)
3.55 cm
(1.4 in.)
Figure 3. SCC-RLY01 Dimensions
Weight.................................................... 37 g (1.3 oz)
1
Excluding contact bounce time
© National Instruments Corporation
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SCC-RLY01 Relay Module User Guide
I/O connectors.........................................One 20-pin right-angle
male connector
One 3-pin screw-terminal block
Field-wiring diameter .............................28 to 16 AWG
Maximum Working Voltage
Maximum working voltage refers to the signal voltage plus the
common-mode voltage.
When used with an SCC-2345
Channel-to-earth (inputs)................. 60 VDC, Measurement
Category I
Caution Do not use for connection to signals in Measurement Category II, III, or IV.
Do not connect to MAINS.
When used with an SCC-68
Channel-to-earth (inputs)................. 300 VDC, Measurement
Category II1
Caution Do not use for connection to signals in Measurement Category III, or IV.
Isolation Voltage
Channel-to-channel, channel-to-earth isolation
Continuous.......................................60 VDC,
Measurement Category I
Withstand.........................................2300 Vrms verified by a 5 s
dielectric withstand type test
Environmental
Operating temperature ............................0 to 50 °C
Storage temperature................................–20 to 65 °C
Humidity.................................................10 to 90% RH, noncondensing
Maximum altitude...................................2,000 m
Pollution Degree (indoor use only) ........2
1
For voltages >60 VDC, you must use the high-voltage backshell.
SCC-RLY01 Relay Module User Guide
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ni.com
Safety
This product meets the requirements of the following standards of safety
for electrical equipment for measurement, control, and laboratory use:
•
•
IEC 61010-1, EN 61010-1
UL 61010-1, CSA 61010-1
Note For UL and other safety certifications, refer to the product label or the Online
Product Certification section.
Electromagnetic Compatibility
This product meets the requirements of the following EMC standards for
electrical equipment for measurement, control, and laboratory use:
•
•
•
•
EN 61326 (IEC 61326): Class A emissions; Basic immunity
EN 55011 (CISPR 11): Group 1, Class A emissions
AS/NZS CISPR 11: Group 1, Class A emissions
FCC 47 CFR Part 15B: Class A emissions
ICES-001: Class A emissions
Note For the standards applied to assess the EMC of this product, refer to the Online
Product Certification section.
Note For EMC compliance, operate this product according to the documentation.
Note For EMC compliance, operate this device with shielded cables.
CE Compliance
This product meets the essential requirements of applicable European
Directives as follows:
•
•
2006/95/EC; Low-Voltage Directive (safety)
2004/108/EC; Electromagnetic Compatibility Directive (EMC)
Online Product Certification
Refer to the product Declaration of Conformity (DoC) for additional
regulatory compliance information. To obtain product certifications and
the DoC for this product, visit ni.com/certification, search by model
number or product line, and click the appropriate link in the Certification
column.
© National Instruments Corporation
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SCC-RLY01 Relay Module User Guide
Environmental Management
NI is committed to designing and manufacturing products in an
environmentally responsible manner. NI recognizes that eliminating
certain hazardous substances from our products is beneficial to the
environment and to NI customers.
For additional environmental information, refer to the NI and the
Environment Web page at ni.com/environment. This page contains the
environmental regulations and directives with which NI complies, as well
as other environmental information not included in this document.
Waste Electrical and Electronic Equipment (WEEE)
EU Customers At the end of the life cycle, all products must be sent to a WEEE recycling
center. For more information about WEEE recycling centers and National Instruments
WEEE initiatives, visit ni.com/environment/weee.
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SCC-RLY01 Module Pin Assignments
Figure 4 shows the I/O connector pins on the bottom of the module.
4
1
2
3
5
1 Pin 1
2
Pin 2
3
PWB Key
4
Pin 19
5
Pin 20
Figure 4. SCC Module Bottom View
SCC-RLY01 Relay Module User Guide
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Table 1 lists the signal connection corresponding to each pin. GND is the
reference for the +5 V supply.
Table 1. SCC-RLY01 Pin Signal Connections
Pin Number
Signal
—
1
2
—
3
—
4
—
5
—
6
—
7
P0.(X)
—
8
9
+5 V
GND
—
10
11
12
13
14
15
16
17
18
19
20
—
—
—
—
—
—
—
—
—
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