PXI-2523 Overview
- Updated2023-02-18
- 4 minute(s) read
PXI-2523 Overview
PXI-2523 Pinout
| Signal | Description |
|---|---|
| COMx+ | Routing destination for corresponding positive signal connections |
| COMx- | Routing destination for corresponding negative signal connections |
| NCx+ | Normally closed positive signal connection |
| NCx- | Normally closed negative signal connection |
| NOx+ | Normally open positive signal connection |
| NOx- | Normally open negative signal connection |
| — | No connection |
PXI-2523 Hardware Diagram
This figure shows the hardware diagram of the module.
Refer to the following list for relay names on the module.
k0...k25
PXI-2523 Topology
Module software name: 2523/26-DPDT (NISWITCH_TOPOLOGY_2523_26_DPDT)
The module composed of 26 armature non-latching DPDT relays.
For certain applications, you may need to increase the default settling time.
26-DPDT Topology
Making a Connection
You can control the channels using the niSwitch Connect Channels VI or the niSwitch_Connect function.
To connect the NO terminal to the COM terminal of that channel, disconnect the NC terminal from the COM of that channel.
For example, to connect NO2 to COM2, use the following code:
niSwitch_Disconnect(vi, "nc2", "com2")
niSwitch_Connect(vi, "no2", "com2")
To connect the NC terminal to the COM terminal of that channel, disconnect the NO terminal from the COM of that channel.
For example, to connect NC2 to COM2, use the following code:
niSwitch_Disconnect(vi, "no2", "com2")
niSwitch_Connect(vi, "nc2", "com2")
When scanning the module, a typical scan list entry could be nc2->com2;. This entry routes the signal connected to NC2 to COM2.
PXI-2523 Relay Replacement
The module uses electromechanical armature relays.
Refer to the following table for information about ordering replacement relays.
| Replacement Relay | Part Number |
|---|---|
| Tyco Electronics (relay manufacturer) | 5-1462039-8 |
| NI relay kit (10 relays) | 781089-10 |
Ensure you have the following:
- Temperature-regulated soldering iron set to 371 °C (700 °F) for lead-free solder rework
- 96.5/3.0/0.5 Tin/Silver/Copper solder (flux core) for lead-free solder rework
- Solder wick
- Fine pick
- Isopropyl alcohol
- Cotton swabs
Complete the following steps to disassemble your module and replace a failed relay.
- Ground yourself using a grounding strap or a ground connected to your PXI chassis.
Note Properly grounding yourself prevents damage to your module from electrostatic discharge.
- Locate the relay you want to replace. Relay names are labeled on the front of the
module. The following table maps the relay names to the channel names.
Channel Name Relay Name Channel Name Relay Name ch0 K0 ch20 K20 ch1 K1 ch21 K21 ch2 K2 ch22 K22 ch3 K3 ch23 K23 ch4 K4 ch24 K24 ch5 K5 ch25 K25 ch6 K6 — — ch7 K7 — — ch8 K8 — — ch9 K9 — — ch10 K10 — — ch11 K11 — — ch12 K12 — — ch13 K13 — — ch14 K14 — — ch15 K15 — — ch16 K16 — — ch17 K17 — — ch18 K18 — — ch19 K19 — — - Replace the relay as you would any other through-hole part. Trim the replaced relay leads to no more than 1 mm (0.04 in.) from the PCB.