The V408 is an 1/8 DIN, universal, 5 digit indicator with four alarms, two digital inputs and one SPDT relay output. Available with a green or red display, it accepts temperature inputs from J, K, T, L, N, R, S, B, C and Platinel II type thermocouples and three-wire Platinum 100 Ohm (Pt100) RTDs. Process variables such as 4-20mA, 1-5V and 0- 10V as well as strain gauge bridge inputs can also be measured.

Other thermocouple types or high accuracy 20 to 80 point custom  linearization curves can be configured at the factory. Square root extraction or eight-point curve linearization can be user defined in the field. A second process input is available to accept remote setpoints and compare signals such as the average or difference, or selecting minimum or maximum readings.

Four programmable setpoint alarms can be field configured as rate of change, deviation high or low, non-latching and high or low or new, latching . The new alarm indicates the situation when a latched alarm has not been acknowledged and the measured value crosses the setpoint trip level a second time. The deviation alarm enables the user to reference alarm setpoints relative to a remote (main) setpoint from a controller. This remote setpoint would be a DC signal input to the optional 2nd process input module. Alarm hysterisis (deadband) can be configured from 1 to 9999 process variable units. Each alarm has a programmable delay up to 999.9 seconds.

The alarms can be linked to either the one standard relay output or up to three optional relay or digital output modules. These alarms can be configured in combination (e.g., one or all four alarms linked to one or all relays) and they will operate in fail-safe (i.e., normally energized) or non-fail-safe modes. Additionally, the display can be configured for password protection, limiting access to any or all functions. An alarm blocking function is also configurable to prevent alarm tripping during process start-up.

Two digital input channels are provided to accept alarm acknowledgment (e.g., remote pushbutton). These two digital inputs or the optional triple-digital input modules can also be used for remote setpoint select, alarm acknowledge, process input select, bridge zero and span calibration and tare. Other functions include indicator control such as selecting full menu access, disabling the keypad lockout or simulating keypad functions.

The V408 indicator housing maintains a NEMA 4 (IP54) front panel seal and can be removed or unplugged from the front, without disconnecting any wiring. By disengaging the front panel clips the entire indicator and electronics can be quickly pulled from the panel.

Thermocouples, three-wire RTDs, bridge, voltage and mV signals can be accepted directly into the indicator. Current signals such as 4-20mA are input using the 2.49 Ohm shunt resistor included with the indicator and mounting hardware.

Display:

5 digit (-9999 to 99999), 3 programmable

decimal positions, red or green,

15.9mm (0.6 In.) high characters

Inputs/Outputs:

Analog Process Value (including second input)

• Low Level Range: -100 to 100mV

• High Level Range: 0-20mA, 0-10V

• Sample Rate: 9Hz

Resolution:

<2mV for low levels, <2mV for high levels

Linearity:

Better than 0.2°C

Calibration Accuracy:

+0.2% of reading, or + 1°C or + 1LSD,

whichever is greater

User Calibration:

Low and high offsets can be applied

Input Filtering:

Off to 999.9 seconds

Thermocouples:

Types J, K, T, L, N, R, S, B and Platinel II

Cold Junction:

In automatic mode, >30 to 1 rejection of

ambient temperature change or external 0°C, 45°C, 50°C external references

3-wire Pt100: 0.3mA excitation current

Functions, 2nd analog input:

2nd process value, remote setpoint,

select min, select max., derived value

Digital Inputs: (contact closure or open collector)

Digital Inputs 1 and 2:

switching voltage/current (non-isolated

from the PV) 24VDC/20mA nominal

• Off state Resistance: <100 Ohms

• On State Resistance: >28K Ohms

Triple Contact Inputs:

Specification is as per digital inputs 1 & 2,

except inputs are functionally isolated

Externally powered (triple logic inputs):

• Off State: <5V DC

• On State: 10.8 to 30V DC @ 2.5mA

Functions:

Triple logic or contact inputs can be

configured for disable, alarm

acknowledge, keylock, remote

setpoint select, PV input 2 select,

and strain gauge 1&2 tare correction.