PXI-2503 Specifications

Caution The protection provided by the PXI-2503 can be impaired if it is used in a manner not described in this document.

Definitions

Warranted specifications describe the performance of a model under stated operating conditions and are covered by the model warranty.

Characteristics describe values that are relevant to the use of the model under stated operating conditions but are not covered by the model warranty.

Typical specifications describe the performance met by a majority of models.
Nominal specifications describe an attribute that is based on design, conformance testing, or supplemental testing.

Specifications are Typical unless otherwise noted.

Conditions

Specifications are valid at 23 °C unless otherwise noted.

All voltages are specified in DC, AC_pk, or a combination unless otherwise specified.

PXI-2503 Pinout

1-Wire 48 × 1 Multiplexer Pinout

Table 1. 1-Wire 48 × 1 Multiplexer Signal Descriptions
Signal	Description
1wireREF	Signal connection reference
AB0+	Positive analog bus connection
AB0-	Negative analog bus connection
CHx	Signal connection
COM0+	Routing destination for all channels
COM0-	Routing destination for all 1wireREF connections
EXT_TRIG_IN	External trigger input connection
GND	Ground connection
RSVD	Reserved, do not connect
SCAN_ADV	Scan advanced output connection
—	No connection

2-Wire 24 × 1 Multiplexer Pinout

Table 2. 2-Wire 24 × 1 Multiplexer Signal Descriptions
Signal	Description
AB0+	Positive analog bus connection
AB0-	Negative analog bus connection
CHx+	Positive signal connection
CHx-	Negative signal connection
CJS+	CJC positive connection
CJS-	CJC negative connection
COM0+	Routing destination for all positive channels
COM0-	Routing destination for all negative channels
EXT_TRIG_IN	External trigger input connection
GND	Ground connection
RSVD	Reserved, do not connect
SCAN_ADV	Scan advanced output connection
—	No connection

2-Wire Dual 12 × 1 Multiplexer Pinout

Table 3. 2-Wire Dual 12 × 1 Multiplexer Signal Descriptions
Signal	Description
ABx+	Positive analog bus connection
ABx-	Negative analog bus connection
CHx+	Positive signal connection
CHx-	Negative signal connection
CJS+	CJC positive connection
CJS-	CJC negative connection
COMx+	Routing destination for corresponding positive signal connections
COMx-	Routing destination for corresponding negative signal connections
EXT_TRIG_IN	External trigger input connection
GND	Ground connection
RSVD	Reserved, do not connect
SCAN_ADV	Scan advanced output connection
—	No connection

2-Wire Quad 6 × 1 Multiplexer Pinout

Table 4. 2-Wire Quad 6 × 1 Multiplexer Signal Descriptions
Signal	Description
ABx+	Positive analog bus connection
ABx-	Negative analog bus connection
CHx+	Positive signal connection
CHx-	Negative signal connection
CJS+	CJC positive connection
CJS-	CJC negative connection
COMx+	Routing destination for corresponding positive signal connections
COMx-	Routing destination for corresponding negative signal connections
EXT_TRIG_IN	External trigger input connection
GND	Ground connection
RSVD	Reserved, do not connect
SCAN_ADV	Scan advanced output connection
—	No connection

4-Wire 12 × 1 Multiplexer Pinout

Table 5. 4-Wire 12 × 1 Multiplexer Signal Descriptions
Signal	Description
ABx+	Positive analog bus connection
ABx-	Negative analog bus connection
CHxA+	Positive excitation connection
CHxA-	Negative excitation connection
CHxB+	Positive sense connection
CHxB-	Negative sense connection
COM0x+	Routing destination for positive channels on the corresponding bank
COM0x-	Routing destination for negative channels on the corresponding bank
EXT_TRIG_IN	External trigger input connection
GND	Ground connection
RSVD	Reserved, do not connect
SCAN_ADV	Scan advanced output connection
—	No connection

2-Wire 4 × 6 Matrix Pinout

Table 6. 2-Wire 4 × 6 Matrix Signal Descriptions
Signal	Description
ABx+	Positive analog bus connection
ABx-	Negative analog bus connection
COLx+	Positive column connection
COLx-	Negative column connection
EXT_TRIG_IN	External trigger input connection
GND	Ground connection
RSVD	Reserved, do not connect
ROWx+	Positive row connection
ROWx-	Negative row connection
SCAN_ADV	Scan advanced output connection
—	No connection

Topology

Topologies

1-wire 48 × 1 multiplexer

2-wire 24 × 1 multiplexer

2-wire Dual 12 × 1 multiplexers

2-wire Quad 6 × 1 multiplexers

4-wire 12 × 1 multiplexer

2-wire 4 × 6 matrix

Input Characteristics

All input specifications are DC, AC_rms, or a combination, unless otherwise specified.

Caution The switching power is limited by the maximum switching current and the maximum voltage. Switching power must not exceed 30 W (37.5 VA) per channel.

Maximum switching voltage (channel-to-channel and channel-to-ground)

30 VAC, 60 VDC

Maximum switching current (per channel)

1 A

Maximum carry current (per channel)

1 A

Maximum switching power (per channel)

30 W

Minimum switch load

10 μA, 10 mV

DC path resistance^[1]¹ Path resistance is a combination of relay contact resistance and trace resistance. Contact resistance typically remains low for the life of a relay. At the end of relay life, the contact resistance rapidly rises above 1.0 Ω.
Initial	<1 Ω, warranted
End-of-life	>2 Ω

Thermal EMF (differential)

<2 μV

RF Performance Characteristics

Bandwidth (50 Ω termination)

≥10 MHz, typical

Channel-to-channel isolation (50 Ω termination)
10 kHz	>100 dB, typical
100 kHz	>80 dB, typical
1 MHz	>55 dB, typical
10 MHz	>30 dB, typical

Dynamic Characteristics

Maximum scan rate

100 channels/s, typical

Relay operate time (at 20 °C)^[2]² Certain applications might require additional time for proper settling. For information about including additional settling time, refer to the NI Switches Help.

3 ms, typical

5 ms, maximum

Release time (at 20 °C)

1.5 ms, typical

5 ms, maximum

Expected relay life
Mechanical	5 × 10⁷ cycles
Electrical (maximum load)	2 × 10⁵ cycles

Trigger Characteristics

Input trigger

Sources

PXI trigger lines <0...7>, front panel

Minimum pulse width
PXI trigger lines	70 ns
Front panel	500 ns

Output trigger
Destinations	PXI trigger lines <0...7>, front panel
Default pulse width	2 μs, typical

Physical Characteristics

Relay type

Electromechanical, nonlatching

I/O connector

68-pin male SCSI

Power requirement

+5 VDC

370 mA, typical

700 mA, maximum

Relay contact material

Gold-clad silver alloy

Dimensions (L × W × H)

3U, one slot, PXI/cPCI module

21.6 cm × 2.0 cm × 13.0 cm (8.5 in. × 0.8 in. × 5.1 in.)

Weight

228 g (8 oz)

Environment

Operating temperature	0 °C to 50 °C
Storage temperature	-20 °C to 70 °C
Relative humidity	5% to 85% noncondensing
Pollution Degree	2
Maximum altitude	2,000 m

Indoor use only.

Shock and Vibration

Operational shock

30 g peak, half-sine, 11 ms pulse (Tested in accordance with IEC 60068-2-27. Test profile developed in accordance with MIL-PRF-28800F.)

Random vibration
Operating	5 Hz to 500 Hz, 0.3 g_rms
Nonoperating	5 Hz to 500 Hz, 2.4 g_rms (Tested in accordance with IEC 60068-2-64. Nonoperating test profile exceeds the requirements of MIL-PRF-28800F,Class 3.)

Compliance and Certifications

Safety Compliance Standards

This product is designed to meet the requirements of the following electrical equipment safety standards for measurement, control, and laboratory use:

IEC 61010-1, EN 61010-1
UL 61010-1, CSA C22.2 No. 61010-1

Note For safety certifications, refer to the product label or the Product Certifications and Declarations section.

Electromagnetic Compatibility

This product meets the requirements of the following EMC standards for electrical equipment for measurement, control, and laboratory use:

EN 61326-1 (IEC 61326-1): Class A emissions; Basic immunity
EN 55011 (CISPR 11): Group 1, Class A emissions
EN 55022 (CISPR 22): Class A emissions
EN 55024 (CISPR 24): Immunity
AS/NZS CISPR 11: Group 1, Class A emissions
AS/NZS CISPR 22: Class A emissions
FCC 47 CFR Part 15B: Class A emissions
ICES-001: Class A emissions

Note In the United States (per FCC 47 CFR), Class A equipment is intended for use in commercial, light-industrial, and heavy-industrial locations. In Europe, Canada, Australia, and New Zealand (per CISPR 11), Class A equipment is intended for use only in heavy-industrial locations.

Note Group 1 equipment (per CISPR 11) is any industrial, scientific, or medical equipment that does not intentionally generate radio frequency energy for the treatment of material or inspection/analysis purposes.

Note For EMC declarations, certifications, and additional information, refer to Product Certifications and Declarations.

Product Certifications and Declarations

Refer to the product Declaration of Conformity (DoC) for additional regulatory compliance information. To obtain product certifications and the DoC for NI products, visit ni.com/product-certifications, search by model number, and click the appropriate link.

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 Engineering a Healthy Planet 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.

EU and UK Customers

Waste Electrical and Electronic Equipment (WEEE)—At the end of the product life cycle, all NI products must be disposed of according to local laws and regulations. For more information about how to recycle NI products in your region, visit ni.com/environment/weee.

电子信息产品污染控制管理办法（中国RoHS）

中国RoHS— NI符合中国电子信息产品中限制使用某些有害物质指令(RoHS)。关于NI中国RoHS合规性信息，请登录 ni.com/environment/rohs_china。(For information about China RoHS compliance, go to ni.com/environment/rohs_china.)