National Instruments Relay Module SCC-RLY01 User manual

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 or 250 VAC.
Any single E 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.

SCC-RLY01 Relay Module User Guide 2 ni.com
bold Bold text denotes items that you must select or click in the software, such
as menu items and dialog box options. Bold text also denotes parameter
names.
italic Italic text denotes variables, emphasis, a cross reference, or an introduction
to a key concept. This font also denotes text that is a placeholder for a word
or value that you must supply.
monospace Text in this font denotes text or characters that you should enter from the
keyboard, sections of code, programming examples, and syntax examples.
This font is also used for the proper names of disk drives, paths, directories,
programs, subprograms, subroutines, device names, functions, operations,
variables, filenames, and extensions.
SC-2345 SC-2345 refers to both the SC-2345 connector block and SC-2345 with
configurable connectors.
SCC SCC refers to any SCC Series signal-conditioning module.
What You Need to Get Started
To set up and use the SCC-RLY01, you need the following items:
❑SC-2345/2350 with one of the following:
–SCC-PWR01
– SCC-PWR02 and the PS01 power supply
– SCC-PWR03 (requires a 7 to 42 VDC power supply, not included)
❑One or more SCC-RLY01 modules
❑SC-2345/2350 User Manual, available at ni.com
❑SCC-RLY01 Relay Module User Guide
❑SCC Quick Start Guide, available at ni.com
❑Read Me First: Safety and Radio-Frequency Interference
❑SC-2345 Quick Reference Label
❑68-pin E Series DAQ device, documentation, and 68-pin cable
❑1/8 in. flathead screwdriver
❑Numbers 1 and 2 Phillips screwdrivers

©National Instruments Corporation 3 SCC-RLY01 Relay Module User Guide
❑Wire insulation strippers
❑NI-DAQ (current version) for Windows 2000/NT/XP
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 SC-2350 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 P0. socket J(X+9), where Xis 0 to 7, on the
SC-2345.
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 an E Series DAQ
device P0. line X. The value of Xis determined by the number of the P0.
socket, J(X+9), where you plug in the SCC-RLY01. The following figure is
a circuit diagram of the SCC-RLY01.

SCC-RLY01 Relay Module User Guide 4 ni.com
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 ...................5 A at 250 VAC
5 A at 30 VDC
Signal bandwidth ....................................DC to 400 Hz
Contact resistance ...................................30 mΩmax
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 ×107operations at 180 cpm
(minimum)
1 Excluding contact bounce time
SCC-RLY01
E Series
NO
NC
COM
+5 V
PO ( X )
D GND
1
2
3
390 Ω, 1/4 W

©National Instruments Corporation 5 SCC-RLY01 Relay Module User Guide
Power Requirement
Digital power.......................................... 300 mW max
+5 V........................................................ 60 mA max
Physical
Dimensions............................................. 8.89 cm × 2.92 cm ×1.85 cm
(3.50 in. ×1.15 in. ×0.73 in.)
Mass ....................................................... 37 g (1.3 oz)
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.
Channel to earth (inputs)........................ ±300 V, Installation Category II1
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
Safety
The SCC-RLY01 meets the requirements of the following standards
for safety of electrical equipment for measurement, control, and
laboratory use:
• IEC 61010-1, EN 61010-1
• UL 3111-1, UL 61010B-1
• CAN/CSA C22.2 No. 1010.1
1 Isolation test voltage is 2,400 VAC at 2 s.

SCC-RLY01 Relay Module User Guide 6 ni.com
Note For UL and other safety certifications, refer to the product label, or visit
ni.com/hardref.nsf, search by model number or product line, and click the
appropriate link in the Certification column.
Electromagnetic Compatibility
Emissions................................................EN 55011 Class A at 10 m
FCC Part 15A above 1 GHz
Immunity ................................................EN 61326:1997 + A2:2001,
Table 1
CE, C-Tick, and FCC Part 15 (Class A) Compliant
Note For full EMC compliance, operate this device with shielded cabling.
CE Compliance
This product meets the essential requirements of applicable European
Directives, as amended for CE marking, as follows:
Low-Voltage Directive (safety)..............73/23/EEC
Electromagnetic Compatibility
Directive (EMC) .....................................89/336/EEC
Note Refer to the Declaration of Conformity (DoC) for this product for any additional
regulatory compliance information. To obtain the DoC for this product, visit
ni.com/hardref.nsf, search by model number or product line, and click the
appropriate link in the Certification column.

©National Instruments Corporation 7 SCC-RLY01 Relay Module User Guide
SCC-RLY01 Module Pin Assignments
Figure 1 shows the I/O connector pins on the bottom of the module.
Figure 1. SCC Module Bottom View
Table 1 lists the signal connection corresponding to each pin. GND is the
reference for the +5 V supply.
1Pin1 2Pin2 3PWBKey 4Pin19 5 Pin 20
Table 1. SCC-RLY01 Pin Signal Connections
Pin Number Signal
1 —
2—
3 —
4 —
5 —
6 —
7P0.(X)
8 —
9+5 V
10 GND
11 —
12 —
5
4
2
1
3

National Instruments™, NI™, ni.com™, and NI-DAQ™ are trademarks of National Instruments
Corporation. Product and company names mentioned herein are trademarks or trade names of their
respective companies. For patents covering National Instruments products, refer to the appropriate
location: Help»Patents in your software, the patents.txt file on your CD, or ni.com/patents.
© 2001–2004 National Instruments Corp. All rights reserved.
371079B-01 Mar04
*371079B-01*
13 —
14 —
15 —
16 —
17 —
18 —
19 —
20 —
Table 1. SCC-RLY01 Pin Signal Connections (Continued)
Pin Number Signal