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51-52-03-27
Page 6
Specifications, continued
Design (continued)
Controller Output Types (continued) Electromechanical Relays (One or Two)
SPDT contacts. Both Normally Open and Normally Closed contacts are brought
out to the rear terminals.
Internally socketed
Resistive Load:
5 amps @ 120 Vac or 30Vdc, 2.5 ampere at 240Vac
Inductive Load:
50 VA @ 120 Vac or 240 Vac
Motor:
1/6 H.P.
Solid State Relays (One or Two)
SPST solid state contacts consisting of a triac N.O. output.
Internally socketed
Resistive Load:
1.0 amp @ 25°C and 120 or 240 Vac
0.5 amp @ 55°C and 120 or 240 Vac
Inductive Load:
50 VA @ 120 Vac or 240 Vac
Minimum Load:
20 milliamps
Open Collector Outputs (One or Two)
Maximum Sink Current:
20 mA
Overload Protection:
100 mA
Internally powered @ 25 Vdc
Opto-isolated from all other circuits except current output, but not from each
other.
Socketed jumper assembly replaces relay.
Solid State Relays (10 amps)
One or two externally mounted SPST triac N.O. outputs for use with open
collector outputs.
Resistive Load:
15 amps @ 25°C and 120 or 240 Vac
10 amps @ 55°C and 120 or 240 Vac
Inductive Load:
50 VA @ 120 Vac or 240 Vac
Motor Rating:
1 HP @ 25°C
0.75 HP @ 55°C
Controller Output Algorithms On-Off or Time Proportional
One relay or open collector output. Control action can be set for direct or reverse.
Time Proportional Relay Resolution:
3.3 msec
On-Off Duplex, Three Position Step Control, or Time Proportional Duplex
Two relays or open collector outputs. Control action can be set for direct or
reverse.
Time Proportional Relay Duplex Resolution:
3.3 msec
Current Proportional
A single 4-20 mA current output signal which can be configured for direct or
reverse action.
Current Proportional Duplex
A single split current output for both heat and cool (4-12 cool, 12-20 heat) or a
combination of current proportional output (Heat = 50 to 100% of range) and
auxiliary current output (Cool = 0 to 50% of range). Both are 4-20 mA signals
which can be set for direct or reverse action.
Current/Time Duplex
Variation of time proportional duplex for Heat/Cool applications. Time proportional
output (heat or cool) is a relay. Current proportional output (Heat or Cool) is a 4-
20 mA signal that can be fed into a negative or positive grounded load of 0 to 750
ohms and is operational over 50% of range or the entire range.
Digital Input (Optional)
(Isolated)
+25 Vdc source for external dry contacts or isolated solid state contacts. The
Digital Input option detects the state of external contact.
On contact closure the controller will respond according to how the digital input is
configured. Opening contact causes return to previous state.
Input Filter
Software
: Single pole lowpass section with selectable time constants, off to 120
seconds available on both analog inputs.