RPR-23
Repeating Pulse Relay

GENERAL DESCRIPTION

The RPR-23 repeating pulse relay is designed to provide two isolated "dry", mercury-wetted form "C" (K, Y, & Z) contacts from a single form "C" input over a wide voltage range. One of the isolated outputs is permanently configured to a three-wire output mode. The second output may be configured to have either a true two-wire output or a three-wire output by a field changeable switch selection. In the two-wire mode, the second output will output a contact closure between the K1 and Y1 leads of approximately 100 milliseconds every time there is a valid change of the input status.

The typical application of the RPR-23 relay is where a pulse hand-off is given to an energy control system (normally a two wire input) and the information is also recorded on a demand interval recorder for the utilities billing use. Other applications include interfaces between counters, input-output comparison devices and supervisory control systems (SCADA) interfaces. The RPR-23 relay is designed to retain the last valid input status upon loss of the system's power thereby preventing false outputs from occurring. An incorrect sequence of input pulses is detected and only the first valid pulse will result in an output.

Bright red and green LED lamps indicate the systems status at all times thus allowing a rapid visual check of the system's performance without requiring any additional test equipment. The RPR-23's input and output circuit's terminal strip is a "EURO" type connector. Each "K" lead of the RPR-23's outputs is fused to prevent damage to the relays under almost any conditions a user might cause such as excessive current, incorrect wiring, etc. The RPR-23 has built-in transient protection for the mercury wetted relays contacts which eliminates the need for external or off-the-board transient suppressors.

All component parts which have power applied to them, with the exception of the input/output terminal strip are enclosed in a polycarbonate cover for maximum protection. The mounting base plate is also made of polycarbonate and offers excellent electrical insulation between the circuit and the mounting surface. The input "K, Y, & Z" leads may be paralleled with other RPR-2P, RPR-3P, and RPR-23 relays to increase the number of available isolated outputs.

RPR-23 SPECIFICATIONS

ELECTRICAL

Input	90 to 325 VAC. Burden: 10 MA. at 120 VAC
Output	One fixed set of "dry" form "C" contacts and one user configured set of "dry" form "A" or form "C" contacts (K & Y or K, Y, & Z). Output selection is by a board mounted switch. The contacts are mercury wetted "no bounce" relays rated at 500 VDC or 350 VAC 2 Amps. break, 5 amps carry. The maximum rating of the contacts are 100 VA. Factory fused at 1/2 amp. (3AG)
Contact Resistance	50 milliohms maximum, 12 to 14 typical
Insulation Resistance	50 megohms typical
Operate and Release Time	1 to 2 milliseconds typical

MECHANICAL

Mounting	Within 30 degrees of vertical
Size	3.50 inches wide, 7.20 inches high, 1.50 inches deep
Weight	15 ounces

TEMPERATURE

Temperature Range	-38° C to +70° C, -36.4° F to +158° F
Humidity	0 to 98% non-condensing

OPTIONS

Input Voltages

24 VAC