Object or ground sensing with safe (low voltage, low current)
Input can be contact, probe or solid-state sensing device.
Two output poles, independently convertible from normally-open
Compact size. DIN rail or panel mount.
LED status indicator for each output pole.
Regent’s 5 Year “No-Questions-Asked” Warranty.
Part presence or absence detection
Liquid level control
Web break detection
Feed limit switch
Wire break detection
Intrinsic safety barrier interface relay
UL Recognized File number E57361
The SR552A9D and SR552D9D sense the closing
of external contacts or sensors. They are ideal for monitoring part presence
or machine elements in high-speed production and packaging equipment.
An internal power supply provides low voltage sensing to any contact,
positioning electrode, limit switch, magnetic reed switch, float switch,
proximity sensor, etc. The low-energy sensing circuit increases the life
of reed switches and other contacts by eliminating inrush current at turn-on
and arcing at turn-off.
Because they respond to a drop in resistance, these relays will respond
to the closing of “dirty” contacts: a contact resistance below
25K ohms will energize the relay.
When the SR552A9D or SR552D9D senses a closed contact, its two solid-state
output switches energize. Field-proven DC output poles can control industrial
loads such as solenoid valves and contactors, or serve as logic inputs
to programmable controllers.
1. Either output pole can be used to provide a latching function.
2. On the SR552A9D, terminals L2 and –2 are electrically isolated;
either or both may be grounded.
On the SR552D9D, terminals – and –2 are common and may be grounded.
3. For loads greater than 1 amp, do not parallel solid-state switches. The
current will not divide equally and may result in damage.
4. On removal of L1,L2 or +,- voltage, both A,B and C,D open.
5. Reversing DC polarity will not damage these relays, but will prevent