Multi-Tech Systems 7500 - Manual (Page 171)

ION 7500 / ION 7600 User’s Guide I/O Specifications
Chapter 6 - Hardware Reference Page 171
N OTE
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 OTE
The mechanical relays should be protected by external fuses.
Solid-State Relay Outputs
Specifications for the four digital relay (Form A) outputs (D1 through D4) are as
follows:
1 Digital output D4 is configured at the factory to emit pulses for calibration testing purposes.
Operational Block Diagram
STATE RX1 – RX2 RX2 – RX3
Inactive Open Closed
Active Closed Open
Pulse
Closed for
duration of pulse
Open for duration
of pulse
R X1 R X2 R X3
N/O N/C
R
11
R
12
R
13
R
21
R
22
R
23
R
31
R
32
R
33
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
Rear View of Meter
Standard I/O
Solid-State relays