Multi-Tech Systems 7500 Solid-State Relay Outputs, Operational Block Diagram, RX1 RX2 RX2 RX3

ION 7500 / ION 7600 User’s Guide I/O Specifications

NOTE

Because mechanical relays have limited lifetimes, mechanical KYZ relays are typically not suitable for energy pulsing applications. For energy pulsing applications, consider using Form A outputs in KYZ mode.

A typical connection and operational details are illustrated below..

N/ON/C

R X1 R X2 R X3

Operational Block Diagram

STATE	RX1 – RX2	RX2 – RX3
Inactive	Open	Closed
Active	Closed	Open
Pulse	Closed for	Open for duration
	duration of pulse	of pulse

R 11 R 12 R 13 R 21 R 22 R 23 R 31 R 32 R 33

NOTE

The mechanical relays should be protected by external fuses.

Rear View of Meter

Standard I/O

Solid-State relays

Solid-State Relay Outputs

Specifications for the four digital relay (Form A) outputs (D1 through D4) are as follows:

Specification	Value
Signal Type	Continuous or pulse 1
Maximum Load Voltage	30V
Maximum Load Current	80 mA
Isolation	5,000 Vrms
Scan Time	½ cycle
Connection Type	Captured-wire
Wire Type	AWG 28 to AWG 16

1Digital output D4 is configured at the factory to emit pulses for calibration testing purposes.

Chapter 6 - Hardware Reference Page 171