Automated Logic R683 Instruções técnicas - Página 11

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Transfer parameters to this FB.

To activate these tables enter the gain of the

translation table used (either 15.00 or 15.06) on the

FB parameter pages that contain the input for which

the table applies. Set the offset to 0.00.

NOTES:

The minimum resistance for a setpoint adjust input

on the Enhance Zone Sensor port must be equal to

4.7k Ohms. The minimum range for the slidepot on

the setpoint adjust input must be equal to 5k Ohms.

The setpoint input bias parameter for slidepots is

only applicable if the slidepot is connected to the

setpoint adjust input (pin 3 on the Enhance Zone

Sensor, channel 3A.

The setpoint input bias parameter for slidepots is

only applicable if the slidepot is connected to the

sepoint adjust input (pins 3 and 1 on the enhanced

sensor connection, channel 3A).

Analog Outputs

The R683 module has three analog outputs. These

outputs may be used in the following modes:

Voltage Mode (0-10 VDC): 1k Ohm minimum load

impedance.

Current Mode (4-20 mA): Although the R683's analog

outputs were designed to output voltage, it is possible to

use these outputs for current mode devices. To do this,

wire a 1/2 Watt resistor in series with the resistive load,

(as shown in Figure 12). The value of the series resistor is

determined as follows:

= 500 Ohms - R

SERIES

Example: To drive a 100 Ohm resistive load with a

0-20 mA signal, subtract the load resistance from 500

Ohms:

= 500 Ohms - R

SERIES

= 500 Ohms - 100 Ohms

= 400 Ohms

This example is shown in Figure 12.

Rev. (30-JAN-98) • RLM v4.7

Procedure

Digital Outputs

The R683 has six digital outputs which can be connected

to a maximum of 24 Volts AC/DC (see Figures 12). The

digital outputs can be configured as dry contact

(normally open) with a contact rating of 3 A (maximum).

Procedure

By setting the HOA switches (see Figure 1), each digital

output can be placed in ON, OFF, or AUTO mode. The

position of the HOA switches may be monitored through

channels 81-86. Channel 81 corresponds to channel 11,

channel 82 to channel 12, etc. A status of OFF on these

channels indicates the switch is set to AUTO mode. A

status of ON indicates the switch is set to either ON or

OFF mode.

Checkout & Troubleshooting

Checkout is performed using either the Workstation or a

portable computer that is direct-network connected to the

LOAD

module. To use a portable computer, connect an NI485N

cable to the "ACCESS" connector, located in the lower

right corner of the module (see Figure 10).

NOTE: Do NOT separate the NI485N cable adapter with

the LED on it from the rest of the cable. This adapter

LOAD

contains circuitry essential for proper communication.

Check each input by manually causing each sensor to

establish a known condition and then comparing it to the

condition reported on the FB's status page.

Check each output by locking it to a known condition on

the FB's parameter page and then observing that

equipment's operation.

Turn the R683's power switch OFF.

Terminate the output wiring to the top termination

strip as shown in Figure 12.

Turn the R683's power switch ON.

Turn the R683's power switch OFF.

Terminate the output wiring to the top termination

strip as shown in Figures 12.

NOTE: Pilot relays should not be powered from the

same transformer which powers the R683.

Turn the R683's power switch ON.