Product specifications, Specifications – Watlow Optimizing Your Process System with the Series 988 Controller User Manual
Page 56
Specifications
Optimizing Your Process System with the WATLOW Series 988
6.8
Product Specifications
* Electromechanical relays are not recommended for PID control.
They are warranted for only 100,000 contact closures.
Control Mode
•Dual input, quad output, optional retransmit of
set point or process variable.
•Programmable direct and reverse acting control
outputs.
•One step auto-tuning.
Operator Interface
•Local/Remote set point capability.
•Dual, 4-digit LED displays. Upper: 0.4” (10mm),
Lower: 0.3” (8mm).
•Mode, Auto/Man, Display, Up and Down keys.
Input
•Contact input for software function select.
•Type J, K, T, N, C(W5), D(W3), E, R, S, B, Pt 2
thermocouple, 100
Ω platinum 1° or 0.1° RTD, or
0-50mV, 0-100mV, 0-20mA, 4-20mA, 0-5VDC, 1-
5VDC, 0-10VDC, slidewire, digital event input or
heater current options.
•Sensor break protection de-energizes control out-
put to protect system or selectable bumpless
transfer to manual operation. Latching or non-
latching.
•
°F or °C display or process units, user selectable.
Sensor Ranges
J t/c:
32
to 1500
°F or
0
to
816
°C
K t/c:
-328
to 2500
°F or -200 to 1371°C
T t/c:
-328
to
750
°F or -200 to 399°C
N t/c:
32
to 2372
°F or
0
to 1300
°C
R t/c:
32
to 3200
°F or
0
to 1760
°C
S t/c:
32
to 3200
°F or
0
to 1760
°C
B t/c:
1598
to 3300
°F or
870
to 1816
°C
E t/c:
-328
to 1470
°F or -200 to 799°C
C t/c:
32
to 4200
°F or
0
to 2316
°C
D t/c:
32
to 4200
°F or
0
to 2316
°C
Pt 2:
32
to 2543
°F or
0
to 1395
°C
1
°RTD (JIS):-328 to 1166°F or -200 to 630°C
1
°RTD (DIN):-328 to 1472°F or -200 to 800°C
0.1
°RTD (JIS
and DIN):-99.9 to 999.9
°F or -73.3 to 537.7°C
0-5VDC:
-999
to
9999
1-5VDC:
-999
to
9999
0-10VDC:
-999
to
9999
0-20mA:
-999
to
9999
4-20mA:
-999
to
9999
0-50mVDC: -999
to
9999
0-100mVDC:-999 to
9999
Slidewire:
100
to
1200
Ω
Current:
0
to
50mA
Potentiometer: 0
to
1200
Ω
Output Options
•Solid state relay, 0.5A @ 24VAC min., 253VAC
max., opto-isolated, zero cross switching. With or
without contact suppression.
•Open collector, switched DC signal provides a
minimum turn ON voltage of 3VDC into a mini-
mum 500
Ω load; maximum ON voltage not
greater than 32VDC into an infinite load.
•Electromechanical relay*, Form C, 5A @ 120/
240VAC, 6A @ 28VDC, 1/8 hp. @ 120VAC, 125VA
@ 120VAC. With or without contact suppression.
•Process, 0-20mA, 4-20mA, 0-5VDC, 1-5VDC, or 0-
10VDC.
•Electromechanical relay*, Form A/B, 5A @ 120/
240VAC, 6A @ 28VDC, 1/8 hp. @ 120VAC, 125VA
@ 120VAC. Without contact suppression.
•External transmitter power supply, 5V
±5% @
30mA, 12V
±5% @ 30mA, or 20V ±5% @ 30mA.
•RS-232 communications or EIA-485/RS-422 com-
munications, opto-isolated.
Accuracy
•Calibration accuracy & sensor conformity:
± 0.1%
of span,
±1 LSD, 77°F ± 5°F (25°C ± 3°C) ambient
& rated line voltage
±10%.
•Accuracy span: 1000
°F/540°C minimum.
•Temperature stability:
± 0.2°F/°F (0.1°C/°C)
change in ambient.
•Voltage stability: (
± 0.01% of span) / (% of rated
line voltage).
Agency Approvals
•UL873 and UL508, File #E43684; CSA pending;
NEMA 4X.
Terminals
•#6 compression universal head screws, accepts
20-14 gauge wire.
Power
•100 - 240VAC +10%/-15%, 50/60Hz,
± 5%.
•16VA maximum.
•Data retention upon power failure via non-volatile
memory.
Operating Environment
•32 to 149
°F (0 to 65°C), 0 to 90% relative humid-
ity, non-condensing.