Source Impedance
100 Ω maximum for TC/mV input Less than 20 Ω per wire for RTD input
Input Impedance
Greater than 1 MΩ for TC/mV input Greater than 400 KΩ for 5V to 10V input range
Less than 5 Ω for mA input
Cold Junction
Automatic compensation from 0 to 50 °C Digital Input Input from dry contact (voltage free) to
restart process (optional)
Control OUT 1
Relay (form C) 3 Amp @ 250 Vac resistive load (with varistor on contacts)
(Relay operates in failsafe mode) Limit Type High limit (for heating process)
Low limit (for cooling process) High/Low limit (for special process)
Acknowledgment Mode
To restart the process, two conditions must apply
a)The process returns within setpoint
b)The operator has acknowledged the process (from keyboard, digital input or serial link)
The “a” and “b” sequence may or may not matter depending on C2 (see C2)
Power-Up Mode
Automatic or Manual restart. When in automatic restart the control output is guar- anteed OFF for 1 second.
Setpoint Threshold
Span limits
Threshold hysteresis
From 0.1 to 10.0% of span value or 1 LSD (whichever is greater)
OUT 2 Relay (form A) 2 Amp @ 250 Vac resistive load. OUT 2 is used as alarm output (optional)
Alarm Function
Process alarm
Deviation alarm
Band alarm
Type of Alarm
High/Low (Outside/Inside if band alarm)
Direct/Reverse
Automatic/Manual reset
Standby sequence/No standby sequence
Alarm Threshold
Span limits for process alarm
From 0 to 500 digits for band alarm
From
Alarm Hysteresis
From 0.1 to 10.0% of span value or 1 LSD (whichever is greater)
Serial Interface
Protocol Type
| Modbus/Jbus (RTU mode) |
Device Address | |
| From 1 to 255. NOTE: The interface can |
| support up to 31 devices |
Baud Rate | 600 up to 19200 baud |
Format | 1 start bit |
| 8 bit with/without parity |
| 1 stop bit |
Parity | Even/Odd |
Watch dog | Hw/Sw is provided for automatic restart |
Protection | Internal dip switch for calibration and con- |
| figuration parameter protection. |
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28 | 9/17/02, 2:43 PM |
