Wiring A 4 - 20 Ma Actuator Output; Wiring A Voltage Actuator Output; Wiring The 135Ω Valve/Boiler Output; Wiring The Floating Output - heat-timer DIGI-SPAN Elite MC Series Installation And Operation Manual

Wiring a 4 - 20 mA Actuator Output

(MCA Only)
• An external voltage source is required for the 4-20mA signal. A separate
filtered DC power supply providing between 30 to 36 VDC is needed.
• Set the Mod. Signal in the Startup menu to 4-20mA. See "Modulation
Signal" on page 11.
• Connect the MCA Elite Red wire to the actuator (+) 4-20mA terminal.
• Connect the MCA Elite White wire to the (+) on the DC power supply.
• Connect the (-) on the DC power supply to the actuator (-) input.
• The maximum series resistance for the MCA is 1300Ω at 30VDC.
• DO NOT connect the Blue wire.

Wiring a voltage Actuator Output

(MCA Only)
• Set the Mod. Signal in the Startup menu to one of the voltage options.
See "Modulation Signal" on page 11.
• Connect the MCA Elite Blue wire to the actuator (+) voltage signal.
• Connect the MCA Elite Red wire to the actuator (-) voltage signal.
• The maximum current the MCA Elite can output is 5 mA.
• DO NOT connect the White wire.
Wiring the 135Ω Valve/Boiler Output
(MCP Only)
• The Red MCP Elite wire is Common and should be connected to the R
terminal of the actuator.
• Connect the Blue (Close) and White (Open) MCP Elite wires
consecutively to the actuator's B and W terminals.

Wiring the Floating Output

(MCF Only)
• The MCF Elite has 2 modulating output relays, each is rated at 1A
inductive load or 1/8 HP.
• Connect the MCF Red wire to the power source (transformer).
• Connect the other the wire of the transformer to the actuator Common
terminal.
• Connect the MCF White wire to the actuator (Open) terminal.
• Connect the MCF Blue wire to the actuator (Close) terminal.

Wiring the system Output to a Boiler

• If the boiler requires an activation signal, wire the two Yellow wires to the
boiler circuit TT terminals.
• The MC Elite does not source any output power to the boiler.
• Select H/C unit from the Relay Output mode on the Startup menu. See
"Relay Output" on page 12.

Wiring the system Output to a pump

• The MC Elite will control the system pump up to 1 A (1/8 HP).
• Wire the two Yellow wires to the System Pump circuit.
• The MC Elite does not source any output power to the pump. The relay
makes when energized to switch the power to the pump.
• Select Pump from the Relay Output mode on the Startup menu. See
"Relay Output" on page 12.
MC-Elite Installation and Operation Manual
Common (Red)
4-20mA (White)
Not Used (Blue)
MCP Modulating a 135Ω Boiler
MCP Modulating a 135Ω Boiler
Not Used (White)
MCP Modulating a 135Ω Boiler
MCP Modulating a 135Ω Boiler
Transformer
MCP Modulating a 135Ω Boiler
MCP Modulating a 135Ω Boiler
o
F
o
F
YSTEM
System
MCF Modulating a Floating Actuator
Current
Signal
+ -
30-36VDC
Excitation
4-20mA
Voltage
Modulating
Common (Red)
Voltage
Voltage (Blue)
Signal
Voltage
Modulating
Motorized Valve
Red
White
Blue
135Ω
135Ω
135Ω
Modulating
Signal
Boiler
Close (Blue)
Close
Open (White)
Open
Common (Red)
Comm
135Ω
Floating
120VAC
Motorized Valve
135Ω
Red
Boiler Activation
White
(Yellow)
Blue
135Ω
135Ω
Signal
135Ω
135Ω
System Pump
135Ω
120 VAC
(Yellow)
135Ω
135Ω
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