National Instruments Switch NI UES 3880 User Manual

NI UES-3880  
Hardware Installation Guide  
First Edition, Sept 2007  
P/N: 1802003080110  
 
Panel Layout  
Front Panel View  
2
1. Grounding screw  
5
6
7
2. Terminal block for power inputs  
PWR1/PWR2 and relay output  
3. Heat dissipation orifices  
4. DIP switches  
11  
8
5. Power input PWR1 LED  
6. Power input PWR2 LED  
7. Fault LED  
9
8. 10/100BaseT(X) Port  
9. TP port’s 100 Mbps LED  
10. TP port’s 10 Mbps LED  
11. Model Name  
10  
Top Panel View  
1
12. Screw holes for wall mounting kit  
13. DIN-rail Kit  
V2+  
PWR2  
V2-  
FAULT  
2
V1+  
PWR1  
V1-  
V1 V2 INPUTS: 24 VDC  
3
PORT ALARM  
4
Rear Panel View  
1
2
12  
13  
12  
2 —  
 
Mounting Dimensions (unit = mm)  
21.00 30.00  
54.00  
9.50  
Side View  
135.00  
(unit = mm)  
105.00  
15.10  
13.10  
13.90  
13.90  
18.20  
25.40  
9.75  
3.50  
+
+
+
6
26  
+
6.00  
3.50  
6.00  
+
+
+
+
+
+
10  
10  
5
+
+
30.50  
18  
7.75  
7.75  
13  
13  
135.00  
+
+
+
+
+
+
+
+
+
+
+
+
Front View  
Rear View  
Panel Mount Kit  
3 —  
 
DIN-rail Mounting  
The aluminum DIN-rail attachment plate should already be fixed to the back  
panel of the switch when you take it out of the box. If you need to reattach the  
DIN-rail attachment plate, make sure the stiff metal spring is situated towards  
the top, as shown in the figures below.  
STEP 1:  
STEP 2:  
Insert the top of the DIN-rail into the  
slot just below the stiff metal spring.  
The DIN-rail attachment unit will  
snap into place as shown below.  
metal  
metal  
spring  
spring  
DIN-Rail  
DIN-Rail  
To remove the switch from the DIN-rail, simply reverse Steps 1 and 2 above.  
Wall Mounting (optional)  
For some applications, you will find it convenient to mount the NI UES-3880  
on the wall, as illustrated below.  
STEP 1:  
Remove the aluminum  
top  
DIN-rail attachment plate  
from the NI UES-3880’s rear  
panel, and then attach the  
wall mount plates, as shown  
in the diagram below.  
plate  
bottom  
plate  
STEP 2:  
6.0 mm  
Mounting the NI UES-3880 on the wall requires 4 screws.  
Use the switch, with wall mount plates attached, as a guide  
to mark the correct locations of the 4 screws. The heads of  
the screws should be less than 6.0 mm in diameter, and the  
shafts should be less than 3.5 mm in diameter, as shown in  
the figure at the right.  
3.5 mm  
NOTE Before tightening the screws into the wall, make sure the screw head  
and shank size are suitable by inserting the screw into one of the  
keyhole-shaped apertures of the Wall Mounting Plates.  
Do not screw the screws in all the way—leave about 2 mm to allow room for  
sliding the wall mount panel between the wall and the screws.  
4 —  
 
STEP 3:  
Once the screws are fixed in the  
wall, insert the four screw heads  
through the large parts of the  
keyhole-shaped apertures, and then  
slide the NI UES-3880  
downwards, as indicated. Tighten  
the four screws for added stability.  
Wiring Requirements  
WARNING  
Do not disconnect modules or wires unless the power supply has  
been switched off or the area is known to be non-hazardous. The  
devices may only be connected to the supply voltage shown on  
the type plate.  
The devices are designed for operation with a Safety Extra-Low  
Voltage. Thus, they may only be connected to the supply voltage  
connections and to the signal contact with the Safety Extra-Low  
Voltages (SELV) in compliance with IEC950/ EN60950/  
VDE0805.  
WARNING  
Substitution of components may impair suitability for Class I,  
Division 2, and Zone 2. These devices must be supplied by an  
SELV source as defined in Low Voltage Directive 73/23/EEC  
and 93/68/EEC.  
WARNING  
This unit is a built-in type. When the unit is installed in another  
piece of equipment, the equipment enclosing the unit must  
comply with fire enclosure regulation IEC 60950/EN60950 (or  
similar regulation).  
WARNING  
Safety First!  
Be sure to disconnect the power cord before installing and/or  
wiring your Switch.  
Calculate the maximum possible current in each power wire and  
common wire. Observe all electrical codes dictating the  
maximum current allowable for each wire size.  
If the current goes above the maximum ratings, the wiring could  
overheat, causing serious damage to your equipment.  
5 —  
 
You should also pay attention to the following items:  
y
Use separate paths to route wiring for power and devices. If power wiring  
and device wiring paths must cross, make sure the wires are perpendicular  
at the intersection point.  
y
y
NOTE: Do not run signal or communications wiring and power wiring in  
the same wire conduit. To avoid interference, wires with different signal  
characteristics should be routed separately.  
You can use the type of signal transmitted through a wire to determine  
which wires should be kept separate. The rule of thumb is that wiring that  
shares similar electrical characteristics can be bundled together.  
Keep input wiring and output wiring separated.  
y
y
It is strongly advised that you label wiring to all devices in the system when  
necessary.  
Grounding the Switch  
Grounding and wire routing help limit the effects of noise due to  
electromagnetic interference (EMI). Run the ground connection from the  
ground screw to the grounding surface prior to connecting devices.  
ATTENTION  
This product is intended to be mounted to a well-grounded  
mounting surface, such as a metal panel.  
Wiring the Alarm Contact  
The Alarm Contact consists of the two middle contacts of the terminal block on  
the NI UES-3880’s top panel. You may refer to the next section for detailed  
instructions on how to connect the wires to the terminal block connector, and  
how to attach the terminal block connector to the terminal block receptor. In  
this section, we explain the meaning of the two contacts used to connect the  
Alarm Contact.  
FAULT: The two middle contacts of the  
6-contact terminal block connector are used to  
FAULT  
detect both power faults and port faults. The two  
Top View  
wires attached to the Fault contacts form an open  
circuit when:  
1. The NI UES-3880 has lost power from one of  
the DC power inputs.  
FAULT  
OR  
Front View  
2. One of the ports for which the corresponding  
PORT ALARM DIP Switch is set to ON is  
not properly connected.  
If neither of these two conditions is satisfied, the  
Fault circuit will be closed.  
Wiring the Redundant Power Inputs  
The top two contacts and the bottom two contacts of the 6-contact terminal  
block connector on the NI UES-3880’s top panel are used for the NI  
UES-3880’s two DC inputs. Top and front views of one of the terminal block  
connectors are shown here.  
6 —  
 
STEP 1: Insert the negative/positive DC wires  
into the V-/V+ terminals.  
Top View  
STEP 2: To keep the DC wires from pulling  
loose, use a small flat-blade screwdriver to  
tighten the wire-clamp screws on the front of the  
terminal block connector.  
Front View  
STEP 3: Insert the plastic terminal block  
connector prongs into the terminal block  
receptor, which is located on the NI UES-3880’s  
top panel.  
ATTENTION  
Before connecting the NI UES-3880 to the DC power inputs,  
make sure the DC power source voltage is stable.  
10/100BaseT(X) Ethernet Port Connection  
The 10/100BaseT(X) ports located on the NI UES-3880’s front panel are used  
to connect to Ethernet-enabled devices.  
Below we show pinouts for both MDI (NIC-type) ports and MDI-X  
(HUB/Switch-type) ports, and also show cable wiring diagrams for  
straight-through and cross-over Ethernet cables.  
MDI Port Pinouts  
MDI-X Port Pinouts  
8-pin RJ45  
Pin  
1
Signal  
Tx+  
Pin  
1
Signal  
Rx+  
Rx-  
1
8
2
Tx-  
2
3
Rx+  
Rx-  
3
Tx+  
6
6
Tx-  
RJ45 (8-pin) to RJ45 (8-pin) Straight-Through Cable Wiring  
Straight-Through Cable  
Switch Port  
NIC Port  
RJ45 Plug Pin 1  
Cable Wiring  
RJ45  
Connector  
RJ45  
Connector  
Tx+  
Tx-  
Rx+  
Rx-  
3
6
1
2
3
6
1
2
Rx+  
Rx-  
Tx+  
Tx-  
7 —  
 
RJ45 (8-pin) to RJ45 (8-pin) Cross-Over Cable Wiring  
Cross-Over Cable  
Switch Port  
(NIC Port)  
Switch Port  
(NIC Port)  
RJ45 Plug Pin 1  
RJ45  
RJ45  
Connector  
Cable Wiring  
Connector  
(Rx+) Tx+  
(Rx-) Tx-  
(Tx+) Rx+  
(Tx-) Rx-  
3
6
1
2
1
2
3
6
Rx+ (Tx+)  
Rx- (Tx-)  
Tx+ (Rx+)  
Tx- (Rx-)  
Redundant Power Inputs  
Both power inputs can be connected simultaneously to live DC power sources.  
If one power source fails, the other live source acts as a backup, and  
automatically supplies all of the NI UES-3880’s power needs.  
Alarm Contact  
The NI UES-3880 has one Alarm Contact located on the top panel. For detailed  
instructions on how to connect the Alarm Contact power wires to the two  
middle contacts of the 6-contact terminal block connector, see the Wiring the  
Alarm Contact section. A typical scenario would be to connect the Fault circuit  
to a warning light located in the control room. The light can be set up to switch  
on when a fault is detected.  
The Alarm Contact has two terminals that form a Fault circuit for connecting to  
an alarm system. The two wires attached to the Fault contacts form an open  
circuit when (1) the NI UES-3880 has lost power from one of the DC power  
inputs, or (2) one of the ports for which the corresponding PORT ALARM DIP  
Switch is set to ON is not properly connected.  
If neither of these two conditions occurs, the Fault circuit will be closed.  
DIP Switch Settings  
ON  
DIP  
1
2
3
4
5
6
7
8
ON: Enables the corresponding PORT Alarm. If the port’s link fails, the relay  
will form an open circuit and the fault LED will light up.  
Off: Disables the corresponding PORT Alarm. The relay will form a closed  
circuit and the Fault LED will never light up.  
8 —  
 
LED Indicators  
The front panel of the NI Switch contains several LED indicators. The function  
of each LED is described in the table below.  
LED  
Color  
State  
Description  
Power is being supplied to power input  
PWR1  
On  
AMBER  
PWR1  
Power is not being supplied to power  
input PWR1  
Off  
On  
Off  
On  
Power is being supplied to power input  
PWR2  
AMBER  
RED  
PWR2  
Power is not being supplied to power  
input PWR2  
When the corresponding PORT alarm is  
enabled, and the port’s link is inactive.  
When the corresponding PORT alarm is  
enabled and the port’s link is active, or  
when the corresponding PORT alarm is  
disabled.  
FAULT  
Off  
On  
TP port’s 10 Mbps link is active  
GREEN  
GREEN  
10M  
Blinking Data is being transmitted at 10 Mbps  
Off  
On  
TP Port’s 10 Mbps link is inactive  
TP port’s 100 Mbps link is active  
100M  
Blinking Data is being transmitted at 100 Mbps  
Off TP Port’s 100 Mbps link is inactive  
Auto MDI/MDI-X Connection  
The Auto MDI/MDI-X function allows users to connect the NI UES-3880’s  
10/100BaseTX ports to any kind of Ethernet device, without needing to pay  
attention to the type of Ethernet cable being used for the connection. This  
means that you can use either a straight-through cable or cross-over cable to  
connect the NI UES-3880 to Ethernet devices.  
Dual Speed Functionality and  
Switching  
The NI UES-3880’s 10/100 Mbps switched RJ45 port auto-negotiates with the  
connected device for the fastest data transmission rate supported by both  
devices. The NI UES-3880 is a plug-and-play devices, so that software  
configuration is not required at installation, or during maintenance. The  
half/full duplex mode for the switched RJ45 ports is user dependent and  
changes (by auto-negotiation) to full or half duplex, depending on which  
transmission speed is supported by the attached device.  
Switching, Filtering, and Forwarding  
Each time a packet arrives at one of the switched ports, a decision is made to  
either filter or forward the packet. Packets with source and destination  
addresses belonging to the same port segment will be filtered, constraining  
those packets to one port, and relieving the rest of the network from the need to  
process them. A packet with destination address on another port segment will  
be forwarded to the appropriate port, and will not be sent to the other ports  
9 —  
 
where it is not needed. Packets that are used in maintaining the operation of the  
network (such as the occasional multi-cast packet) are forwarded to all ports.  
The NI UES-3880 operates in the store-and-forward switching mode, which  
eliminates bad packets and enables peak performance to be achieved when  
there is heavy traffic on the network.  
Switching and Address Learning  
The NI UES-3880 has an address table that can hold up to 1K node addresses,  
which makes it suitable for use with large networks. The address tables are  
self-learning, so that as nodes are added or removed, or moved from one  
segment to another, the NI UES-3880 automatically keeps up with new node  
locations. An address-aging algorithm causes the least-used addresses to be  
deleted in favor of newer, more frequently used addresses. To reset the address  
buffer, power down the unit and then power it back up.  
Auto-Negotiation and Speed Sensing  
The NI UES-3880 is a RJ45 Ethernet ports independently support  
auto-negotiation for speeds in the 10BaseT and 100BaseTX modes, with  
operation according to the IEEE 802.3u standard. This means that some nodes  
could be operating at 10 Mbps, while at the same time, other nodes are  
operating at 100 Mbps.  
Auto-negotiation takes place when an RJ45 cable connection is made, and then  
each time a LINK is enabled. The NI UES-3880 advertises its capability for  
using either 10 Mbps or 100 Mbps transmission speeds, with the device at the  
other end of the cable expected to similarly advertise. Depending on what type  
of device is connected, this will result in agreement to operate at a speed of  
either 10 Mbps or 100 Mbps.  
If the NI UES-3880 RJ45 Ethernet port is connected to a non-negotiating  
device, it will default to 10 Mbps speed and half-duplex mode, as required by  
the IEEE 802.3u standard.  
10 —  
 
Specifications  
Technology  
Standards  
Forward and Filtering  
Rate  
IEEE802.3, 802.3u, 802.3x  
148810 pps  
Packet Buffer Memory 256 KB  
Store and Forward, with IEEE802.3x full duplex,  
Processing Type  
back pressure flow control  
1K uni-cast addresses  
Less than 5 μs  
Address Table Size  
Latency  
Interface  
10/100BaseT(X) auto negotiation speed, F/H duplex  
mode, and auto MDI/MDI-X connection  
Power, Fault, 10M, 100M  
RJ45 Ports  
LED Indicators  
DIP Switch  
Port break alarm mask  
One relay output with current carrying capacity of  
1A @ 24 VDC  
Alarm Contact  
Power  
Input Voltage  
12 to 48 VDC, redundant inputs  
Input Current @ 24VDC 0.25 A  
Connection  
Overload Current  
Protection  
Removable “6-pin” Terminal Block  
1.1 A  
Reverse Polarity  
Protection  
Present  
Mechanical  
Casing  
Dimensions  
IP30 protection, metal case  
53.6 × 135 × 105 mm (W × H × D)  
0.63 kg  
Weight  
Installation  
Environmental  
DIN-rail, Wall Mounting  
Operating Temperature -40 to 75ºC (-40 to 167ºF)  
Storage Temperature  
Ambient Relative  
Humidity  
-40 to 85ºC (-40 to 185ºF)  
5 to 95% (non-condensing)  
Regulatory Approvals  
UL60950-1, CSA C22.2 No. 60950-1, EN60950-1,  
TUV  
Safety  
Hazardous Location  
EMI  
UL/cUL Class I, Division 2, Groups A, B, C, and D  
FCC Part 15, CISPR (EN55022) class A  
EN61000-4-2 (ESD), Level 3  
EN61000-4-3 (RS), Level 3  
EMS  
EN61000-4-4 (EFT), Level 3  
EN61000-4-5 (Surge), Level 3  
EN61000-4-6 (CS), Level 3  
Operating Shock  
15g, half-sine, 11 ms pulse  
Operating Vibration  
10 Hz to 150 Hz, 1 grms  
11 —  
 
Technical Support and Professional  
Services  
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Support— Online technical support resources at ni.com/support include  
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12 —  
 
Worldwide Technical Support and Product Information  
ni.com  
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© 2007 National Instruments Corporation. All rights reserved.  
13 —  
 

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