DPR-22PS Dividing Pulse Relay
The DPR-22PS is a microcontroller-based dividing pulse relay meter designed to provide two sets of isolated “dry” 3-wire Form C contacts (KYZ pulse) from a field selectable 2-wire Form A or 3-wire Form C pulse input which have been divided by a user-selected number. The divider’s ratio of input pulses to output pulses may be set between 1 and 255.
Selection of the desired division ratio is by two small selection switches mounted on the relay’s board and is easily adjustable with a small screwdriver. The DPR-22PS microcontroller checks the input pulses for the correct sequence and timing, and counts the input pulses for division only when a correct and valid sequence of pulses occur, thus assuring a high degree of noise rejection. Two sets of bright red and green LED lamps indicate the input and output status of the system at all times thus allowing a rapid visual check-out of the system’s performance without requiring any additional test equipment.
The input and output circuits’ terminal strip are “Euro” type connectors. The K leads of each of the DPR-22PS’s isolated outputs are fused to prevent damage to the relays under almost any condition a user might subject it to such as excessive current, voltage, or incorrect wiring. The DPR-22PS provides a “pulled up” sense voltage of approximately +13 VDC on the Y and Z terminals of the input to the external sending contacts. The K terminal is system ground allowing the use of standard electro-mechanical, dry contact switches or solid state open-collector transistor MOS-FET pulse initiators. The DPR-22PS has built-in MOV transient protection for the solid-state relay contacts that eliminates the need for external or off-the-board transient suppressors. All component parts of the DPR-22PS, which have power applied to them with the exception of the input/output terminal strips and the divider switches, are enclosed in a polycarbonate cover for maximum user protection. The mounting base plate is also made of polycarbonate and offers excellent electrical insulation. The DPR-22PS is intended to be mounted in an enclosure appropriate for the application and the operating environment.
| Electrical | |
|---|---|
| Power Input: | 120 VAC, 208-277 VAC; Burden: 10 mA at 120 VAC |
| Pulse Input Voltage: | +13VDC “pulled-up” on Yin terminal. Common return is Kin terminal. |
| Pulse Output: | Two sets of dry Form “C” contacts (K, Y, & Z) for time or energy pulses. The contacts are solid state relays rated at 250VAC/VDC @ 350 mA MAX. The maximum rating of the contacts is 20 VA. Factory fused at 1/4 amp. (3AG) |
| Contact Resistance: | 50 ohms maximum, 3.4 ohms typical |
| Operate and Release Time: | 5 milliseconds max. operate (turn-on) 3 milliseconds max. release (turn off) |
| Input/Output Isolation Voltage: | 2500Vrms |
| Mechanical | |
|---|---|
| Mounting: | Any position |
| Size: | 3.50” wide, 7.20” high, 1.50” deep |
| Weight: | 12 ounces |
| Temperature | |
|---|---|
| Temperature Range: | -38º C to +70º C, -38.4º F to +158º F |
| Humidity: | 0 to 98% non-condensing |
| Available Options | |
|---|---|
| Input Voltages: | Contact Factory |
All specifications are subject to change without notice.
