National Instruments FP-PG-522, cFP-PG-522 User Manual

FieldPoint Operating Instructions

FP-PG-522 and cFP-PG-522

Eight-Channel Pulse Generator with 2 A, 5–30 VDC Sinking Outputs

These operating instructions describe how to install and use the National Instruments FP-PG-522 and cFP-PG-522 pulse generator modules (referred to inclusively as the [c]FP-PG-522). For details on configuring and accessing the [c]FP-PG-522 over a network, refer to the user manual for the FieldPoint network module you are using.

Features

The [c]FP-PG-522 is a FieldPoint pulse generator module with the following features:

• Eight pulse-output channels

• User-powered 2 A, 5–30 VDC sinking outputs

• 1 s, 10 ms, or 100 µs resolution setting, configurable per channel

• 16-bit on-time and off-time settings

• 100% duty cycle pulse support

• Finite and continuous pulse-generation modes

• Active/Inactive LED indicators

• 2,300 V

• –40 to 70 °C operation

• Hot swappable

transient overvoltage protection

rms

FieldPoint™, National Instruments™, NI™, and ni.com™ 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.

323356B-01 May 2003

Installing the FP-PG-522

The FP-PG-522 mounts on a FieldPoint terminal base (FP-TB-x), which provides operating power to the module. Installing the FP-PG-522 onto a powered terminal base does not disrupt the operation of the bank.

To install the FP-PG-522, refer to Figure 1 and complete the following steps:

1. Slide the terminal base key to either position X, used for any module, or position 4, used for the FP-PG-522 module.

2. Align the FP-PG-522 alignment slots with the guide rails on the terminal base.

3. Press firmly to seat the FP-PG-522 on the terminal base. When the module is firmly seated, the terminal base latch locks it into place.

Key

Latch

Alignment

Slot

Guide Rails

Terminal BaseI/O Module

Figure 1. Installing the FP-PG-522

Installing the cFP-PG-522

The cFP-PG-522 mounts on a Compact FieldPoint backplane (cFP-BP-x), which provides operating power to the module. Installing the cFP-PG-522 onto a powered backplane does not disrupt the operation of the bank.

FP-PG-522 and cFP-PG-522 2 ni.com

To install the cFP-PG-522, refer to Figure 2 and complete the following steps:

1. Align the captive screws on the cFP-PG-522 with the holes on the backplane. The alignment keys on the cFP-PG-522 prevent backward insertion.

2. Press firmly to seat the cFP-PG-522 on the backplane.

3. Using a number 2 Phillips screwdriver with a shank of at least 64 mm (2.5 in.) length, tighten the captive screws to 1.1 N ⋅ m (10 lb ⋅ in.) of torque. The nylon coating on the screws prevents them from loosening.

3 5

1 cFP I/O Module 2 Captive Screws 3 cFP Controller Module

Figure 2. Installing the cFP-PG-522

4 Screw Holes 5 cFP Backplane

Wiring the [c]FP-PG-522

The FP-TB-x terminal base has connections for each of the eight output channels and for an external power supply to power the output channels and field devices. The cFP-CB-x connector block provides the same connections. Each channel has one output terminal (V terminal (COM). All eight channels are referenced to the COM terminals. The V and V as are the C and COM terminals.

Use a 5–30 VDC external power supply for the output channels. The power supply must provide enough current to power all of the loads on the output channels, up to a maximum of 2 A per channel. Connect the external power supply to multiple V and V terminals and to multiple C and COM terminals as needed to ensure that the maximum current through any terminal is 2 A or less.

Install a 2 A maximum, fast-acting fuse between the external power supply and the V a 2 A maximum, fast-acting fuse suitable for the load at the V

terminal. Figure 3 shows fuses where appropriate.

OUT

), two supply terminals (V

OUT

terminals are all internally connected,

SUP

terminal on each channel. Install

SUP

), and one common

SUP

V C

Sinking

Output

Circuitry

To next channel

[c]FP-PG-522

Caution

SUP

2 A max

OUT

COM

Figure 3. Wiring the [c]FP-PG-522

Maximum output current for the cFP-PG-522 is

2 A max

Load

5–30 VDC

External

Power Supply

–

temperature dependent. If the module is operating in the 60–70 °C temperature range, you must select fuses for each channel so that the sum of the squares of the output currents is lower than 8 A

FP-PG-522 and cFP-PG-522 4 ni.com

Table 1 lists the terminal assignments for the signals of each channel. Terminal assignments are also listed on the side panel of the cFP-PG-522 and under the slide-in card on the front of the FP-PG-522.

Table 1. Terminal Assignments

Terminal Numbers

Channel

OUT

SUP

COM

0 2 1,17 18

1 4 3,19 20

2 6 5,21 22

3 8 7,23 24

4 10 9,25 26

5 12 11,27 28

6 14 13,29 30

7 16 15,31 32

Install a 2 A maximum, fast-acting fuse on each V

terminal.

OUT

terminal.

SUP

Pulse Output Circuit

The [c]FP-PG-522 output channels are optically isolated from the rest of the FieldPoint bank. In the ON state, a transistor is turned on between the output (V OFF state, this transistor is turned off, allowing only a small leakage current to flow.

Ensure that the load on any channel does not draw more than 2 A. In addition, the sum of the squares of the channel currents must not exceed 16 A yields 7.2 A

. For example, five channels operating at 1.2 A

) and common (C and COM). In the

OUT

(1.2 A)2 × 5 = 7.2 A

Caution For a cFP-PG-522 operating in the 60 –70 °C

temperature range, the sum of the squares of the channel currents must not exceed 8 A

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