Installation Instructions

Document No. 546-00092
Installation Instructions
August 10, 2011
Page 5 of 6 Siemens Industry, Inc.
Table 1. Switch Settings.
Switch
Position
ON
Switch
Position
OFF
Switch
Position
FHC with
Damper
Boxes
LRC with
Damper
Boxes
Digital
(Floating
Point)
Other
Controller
Analog
(0–10
Vdc, 4–20
mA)
Other
Controller
FHC with
Venturi
Air Valve
LRC with
Venturi
Air Valve
SW1
0to10Vdc
4to20 mA
N/A
N/A
N/A
as
required
0 to 10Vdc
0 to 10Vdc
SW2-1
Analog
Digitala
OFF
OFF
OFF
ON
ON
ON
SW2-2
Test
Norma
OFF
OFF
OFF
OFF
OFF
OFF
SW2-3
Retract
a
Extend
as
required
b
as
required
b
as
required
b
as
required
b
as
required
b
as
required
b
SW2-4
F Last pos
F Safe
a
OFF
OFF
as
required
as
required
OFF
OFF
SW2-5
Standard
LRC/FHC
a
OFF
OFF
as
required
N/A
N/A
N/A
a. Default for all switches.
b. Confirm fail-safe position requirements with control system designer. Siemens Lab Terminal Units and Venturi Air Valves
with the Lab Electric Actuator are always set up with full RETRACT position as fail-safe position: Normally Closed Supply,
Normally Open Exhaust.
Table 2. Switch Usage.
Switch
Position
Use
SW1
4 to 20 mA input
Use when input to LEA Interface board is from a 4 to 20 mA source.
This switch is active only when SW2-1 is set to Analog.
0 to 10 Vdc
Use when input to LEA Interface board is from a 0 to 10 Vdc source.
This switch is active only when SW2-1 is set to Analog.
SW2-1
Digital
a
When control is from a floating (digital) control source.
Analog
When control is from an analog (0 to 10V, 4 to 20 mA) control source.
SW2-2
Norm
a
Normal control operation.
Test
Test mode only. In this position, control inputs are disabled and
actuator responds only to activation of switch SW2-3.
SW2-3
Extend
In test mode (SW2-2); extends actuator fully.
Retract
a b
Active in test mode only (SW2-2); retracts actuator fully.
SW2-4
F Safe
a b
On loss of 24 Vac power, the actuator fully retracts or extends
(depending on SW2-3 position) until power is restored.
F Last pos
On loss of 24 Vac power, the actuator holds its last position until
power is restored.
SW2-5
LRC/FHC
a
Input control is based on the floating output logic of the LRC and
FHC.
a. Default position
b. Look at SW2–3 for direction of Fail safe. Confirm fail-safe position requirements with control system designer.
Siemens Lab Terminal Units and Venturi Air Valves with the Lab Electric Actuator are always set up with full
RETRACT position as fail-safe position: Normally Closed Supply, Normally Open Exhaust.
Table 3. LEA Interface Indicating Lights.
Indicating Light
Use
Description
LED-1
Power
On when valid 24 Vac is applied to the LEA Interface board.
LED-2
Extend
On momentarily when the control signal is to extend the actuator.
LED-3
Retract
On momentarily when the control signal is to retract the actuator.