Service Port

Protocol RS-232

Connector 9-pin Sub-D socket

Interface Cable Type Extension (not null modem)

Isolation 500 Vrms

Driver Current Error Threshold Demanded current does not match measured current to within ±20%.

Driver Overcurrent Threshold Measured current exceeds demanded current by more than 25%.

Approximate Actuator Open

Threshold (minimum) 13/(maximum required current, in amps)

The open threshold varies with current. The

lowest open threshold occurs at the highest

required output current. For example, if the

maximum current required is 120 mA, the

lowest value that will count as an open is

13/0.120 = 108 Ω.

Approximate Actuator

Shorted Threshold 1/(full scale current, in Amps) ohms, where full scale current is the driver current range

displayed on the service tool. For example, if

the driver current range is ±100 mA, the

short threshold is (1/0.100) = 10 Ω.

Exciter Voltage Tolerance ±0.2 Vrms

System Diagnostics Memory test, continuous monitoring of

internal supply voltages, A/D converter

reference check, hardware CPU power

monitor, software watchdog timer.

DeviceNet Communication Faults: Communications between the SPC and its assigned master have stopped or slowed to less than 200 ms.