West - P6700, P8700, P4700 Limit Controllers

Features:

Output configuration

Up to 3 possible, for latching trip relays, alarm/annuncator relays, 24VDC transmitter power supply
or retransmit of process value or limit trip setpoint

Alarm 1 & 2 types

Process high, process low, Limit SP deviation, band, logical OR alarms or trip annunciator.
Alarms have fully adjustable hysteresis

Output reset action

Limit output can be reset only when exceed condition is absent.
Local or remote reset options

Annunciator reset action

Annunciator output can be reset at any time.
Local or remote reset options

Human Interface

4 button operation, dual 4 digit 10mm & 8mm (6700+ & 8700+), 13mm & 10mm (4700+) high LED displays,
optional choice of colours (Red/Red, Red/Green, Green/Red or Green/Green), plus 4 LED indicators

PC configuration

Off-line configuration from PC serial port to dedicated config socket (comms option not required).
Configuration Software for Windows 98 or higher. West Part Number: PS1-CON

Input:

Thermocouple

J, K, C, R, S, T, B, L, N & PtRh20%vsPtRh40%

RTD

3 Wire PT100, 50Ω per lead maximum (balanced)

DC Linear

0 to 20mA, 4 to 20mA, 0 to 50mV, 10 to 50mV, 0 to 5V, 1 to 5V, 0 to 10V, 2 to 10V.
Scaleable -1999 to 9999, with adjustable decimal point

Impedance

>10MΩ for Thermocouple and mV ranges, 47KΩ for V ranges and 5Ω for mA ranges

Accuracy

±0.1% of input range ±1 LSD (T/C CJC better than 1°C)

Sampling

4 per second, 14 bit resolution approximately

Sensor break detection

<2 secs (except zero based DC ranges), Limit trip and annunciators activate.
High alarms activate for Temperature and mV ranges, low alarms activate for, mA or V ranges

Outputs & Options:

Limit trip relay outputs

Latching SPDT, contacts 5Amp resistive at 240V AC, >100,000 operations

Alarm relay outputs

Non-latching SPDT, contacts 2Amp resistive at 240V AC, >500,000 operations

SSR driver alarm outputs

Drive capability >10V DC in 500 minimum

Triac alarm outputs

0.01 to 1 Amp AC, 20 to 280Vrms, 47 to 63Hz

DC linear retransmit outputs

0 to 20mA, 4 to 20mA into 500Ω max, 0 to 10V, 2 to 10V, 0 to 5V into 500Ω min.
Accuracy ±0.25% at 250Ω (degrades linearly to 0.5% for increasing burden to specified limits)

Transmitter power supply

Output 24VDC (nominal) into 910Ω minimum to power external devices

Communications

2 Wire RS485, 1200 to 19200 Baud, Modbus and ASCII protocol (selectable)

Digital input

Volt free or TTL input. -0.6 to 0.8V or contact closure resets latched relays and annunciators

Operating & Environmental:

Temperature & RH

0 to 55°C (-20 to 80°C storage), 20% to 95% RH non-condensing

Power supply

100 to 240V 50/60Hz 7.5VA (optional 20 to 48V AC 7.5VA/22 to 65V DC 5 watts)

Front panel protection

IEC IP66 (Behind panel protection is IP20)

Standards

FM, CE, UL & ULC recognised

Input

Jumper-free configuration for any type
(no extra parts required)

Option Slot 1

Latching limit relay

Fixed

Option Slot 2

Part Number

Relay output

PO2-C10

Linear mA/V DC output

PO2-C21

SSR Driver Output

PO2-C50

Triac Output

PO2-C80

Option Slot 3

Part Number

Relay Output

PO2-C10

Linear mA/V DC Output

PO2-C21

SSR Driver Output

PO2-C50

24VDC Transmitter PSU

PO2-W08

Option Slot A

Part Number

Digital Input

PA1-W03

RS485 Comms

PA1-W06