Spirax Sarco SP8-10, Инструкция по установке и обслуживанию

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IM-P707-01 CTLS Issue 1
24
SP8-10 Smart positioner
3.2.6 Module for universal input UAI*
Module for a 4 to 20 mA input for universal use.
The range can be scaled. It is used for advanced valve diagnostics. For example, an ultrasonic sensor can
be connected to detect a faulty valve seat or a phonometer can be connected to detect cavitation.
The limit values for detecting up-scaling can be freely selected.
Terminals +21/−22
Nominal operating range 4 to 20 mA
Load voltage 8 V at 20 mA
Impedance 400 Ω at 20 mA
3.2.7 Module for the emergency shutdown function*
When the 24 Vdc signal is interrupted, the I/P module executes the respective safety function, depending
on the mechanical construction.
The positioner output 1 is depressurized, and the valve is moved to the safe position. In case of a double-
acting actuator, output 2 is additionally pressurized.
The emergency shutdown module works independently of the mother board, i.e., all information from the
final control element is available in the control system at any time.
Terminals
+85/−86
Supply voltage 24 Vdc (20 to 30 Vdc) (electrically isolated from the input signal)
Safe position Active at < 5 Vdc
3.2.8 Limit switch
The limit switch can either be equipped with proximity switches or with potential-free micro-switches.
3.2.9 Limit switch Limit 1/Limit 2 with proximity switches
Two proximity switches for independent position signaling.
Terminals
+41/−42, +51/−52
Supply voltage 5 to 11 Vdc (Control circuit in accordance with DIN 19234/NAMUR)
Output ‘logical 0’ < 1.2 mA
Output ‘logical 1’ > 2.1 mA
Switching point Adjustable between 0 and 100 %
Direction of action Metal tag in proximity switch/Metal tag outside proximity switch
Type SJ2-SN (NC; log. 1) < 1.2 mA/> 2.1 mA
3.2.10 Limit switch Limit 1/Limit 2 with 24 V micro-switches
Terminals 41/42/43, 51/52/53
Supply voltage maximum 24 V AC/DC
Load rating Maximum 2 A