Precision Digital PD540 - Manual (Page 9)

Relay Outputs
RATINGS Out1: 250 VAC @ 3 A or 30 VDC @ 3 A (resistive load)
Sub1, Sub2: 250 VAC @ 1 A or 30 VDC @ 1 A (resistive load)
ELECTRICAL NOISE A suppressor (snubber) should be connected to each
SUPPRESSION relay contact switching inductive loads, to prevent
disruption to the microprocessor's operation.
Recommended suppressor value: 0.1
μF/470 Ω,
250 VAC (PDX6901)
DEADBAND For alarm operations, 0-100% of full scale, user selectable
HIGH OR LOW User may program any relay for high or low trip point
ALARM
DEVIATION ALARM User may program any relay for a high, low, or range set
point deivation alarm.
RELAY OPERATION Any relay may be set as an alarm relay or for time
proportional PID control.
TIME DELAY 0 to 99 minutes 59 seconds alarm trip delay user
selectable for each alarm. Time proportional PID control
relay activation time delay of 0 to 99 minutes 59 seconds
user selectable.
FAIL-SAFE Programmable
OPERATION Independent for each alarm relay
AUTO INITIALIZATION When power is applied to the controller, alarm relays will
reflect the state of the input to the controller except
standby alarms.
PD540 Series Nova Digital Process and Temperature Controller Instruction Manual
9