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V. CONTROLLING THE RELAYS
A. ISOLATION VOLTAGE
The maximum isolation voltage of the relay output contacts is 1500
VDC. The voltage differential between the relay output contacts and
the load should not exceed 1500 VDC.
B. OUTPUT LOAD
The current through the relay output contacts should not exceed 5
Amp at 115 VAC and 2.5 Amp at 230 VAC in order not to cause
permanent damage to the relay contacts. This rating is specified for
resistive
loads only.
C. RELAY ACTION, RELAY SETPOINT & HYSTERESIS VALUE
Relay Action
Effective RELAY-
ON
Set Point
Effective RELAY-
OFF
Set Point
HIGH
S.P.+ ½(H.V.)
S.P. -½ (H.V.)
LOW
S.P.-½ (H.V.)
S.P.+½ (H.V.)
S.P. = Relay Set point
H.V.= Hysteresis value (Dead Band)
If the relay action is set to
HI
GH and the hysteresis mode is
CENTER
, the relay will turn
ON
at [(RELAY SETPOINT) + (0.5 *
hysteresis value)], and will turn
OFF
at [(RELAY SET POINT) - (0.5
* hysteresis value)].
If the relay action is set to
LO
W and the hysteresis mode is
CENTER, the relay will turn
OFF
at [(RELAY SET POINT) + (0.5 *
hysteresis value)], and will turn
ON
at [(RELAY SET POINT) - (0.5 *
hysteresis value)].