3660 and 3661 Positioners
Instruction Manual
Form 5265
March 2006
3
Table 1. Specifications
Available Configuration
Type 3660:
Single-acting pneumatic valve
positioner
Type 3661:
Single-acting electro-pneumatic valve
positioner
Input Signal
Type 3660
J
0.2 to 1.0 bar
(
3 to 15 psig),
J
0.4 to 2.0 bar
(
6 to 30 psig), or
J
split range (see tables 6 and 7)
Type 3661:
J
4 to 20 mA dc constant current with 30 V dc
maximum compliance voltage.
J
split range is also available, see tables 6 and 7
Equivalent Circuit (Type 3661)
120 ohms shunted by three 5.6 V zener diodes
Output Signal
Type:
Pneumatic pressure as required by the
actuator up to full supply pressure
Action:
J
Direct (increasing input signal pressure
increases positioner output),
J
Reverse (increasing input signal pressure
decreases positioner output)
Supply Pressure
Recommended:
10% above actuator
requirements
Maximum:
6.2 bar (90 psig) or pressure rating of
actuator, whichever is lower
Medium:
air
Type 3660 and 3661 are not compatible with
natural gas as the supply medium
Performance
Independent Linearity:
±
1% of output span
Hysteresis:
0.5% of output span
Deadband:
0.1% of input span
Electromagnetic Interference (EMI) (Type
3661):
Tested per IEC 61326-1 (Edition 1.1).
Meets emission levels for Class A equipment
(industrial locations) and Class B equipment
(domestic locations). Meets immunity
requirements for industrial locations (Table A.1 in
the IEC specification document). Immunity
performance is shown in table 2.
Positioner Adjustments
Span:
J
Adjustable up to 20 mm (0.75 inch) stem
travel, or
J
Adjustable from 20 mm (0.75 inch) to
50 mm (2 inch) stem travel
Zero:
0 to 100%
Gain:
0.5 to 6% PB (proportional band)
Output Volume Damping:
Loop dynamic
response adjustment
Delivery Capacity
1.4 Bar (20 Psig) Supply:
4.3 normal m
3
/hour
(150 scfh)
2.4 Bar
(
35 Psig) Supply:
6.6 normal m
3
/hour
(230 scfh)
Exhaust Capacity
1.4 Bar (20 Psig) Supply:
4.8 normal m
3
/hour
(170 scfh)
2.4 Bar (35 Psig) Supply:
7.4 normal m
3
/hour
(260 scfh)
Steady-State Air Consumption
Type 3660:
0.16 normal m
3
/hour (6.0 scfh) at 1.4
bar (20 psig) supply pressure. 0.21 normal
m
3
/hour (7.9 scfh) at 2.4 bar (35 psig) supply
pressure
Type 3661:
0.24 normal m
3
/hour (8.8 scfh) at 1.4
bar (20 psig) supply pressure. 0.33 normal
m
3
/hour (12.3 scfh) at 2.4 bar (35 psig) supply
pressure
Operating Influence
Supply Pressure:
70 mbar (1 psig) change in
supply pressure changes the actuator stem
position less than 0.16%
of travel
Operative Temperature Limits
Type 3660 without Pressure Gauges:
–40 to
120
°
C (–40 to 250
°
F)
Type 3660 with Pressure Gauges:
–40 to 82
°
C
(–40 to 180
°
F)
Type 3661 with or without Pressure Gauges:
–40 to 82
°
C (–40 to 180
°
F)
– Continued –
