C-415EM
INSTRUCTION MANUAL
DSP-CA(S) CABLE ADAPTER
April 2007
5
Figure 2.2 Modular Jack connections
On the modular jack the pin-out connections are in the same order as for the terminal block assignment. i.e.
Pin 1 signal is TRIP SIGNAL
Pin2 signal is FEEDER ALARM
Pin 3 signal is P0
Pin 4 signal is P1
Pin 5 signal is P2
Pin 6 signal is P3
Pin 7and Pin 8 is GND
Pin 7 or 8 can be used to connect the shield of a cable to ground at one end only .
The connection should be the same at both ends of the cable i.e. pin 1 of one plug should connect to pin 1 on the
other plug and pin 2 to pin 2, and so on.
3. Testing
3.1. A digital multimeter can be used to to verify that the connection is working. With the DSP energized,
connect a digital meter set to read ohms or continuity, between terminal 13 on the left side adapter (whether
it be DSP-CA or DSP-CAS does not matter) and terminal 13 on the right side adapter. There should be no
continuity (2 Megohms, or greater) when there is no short across terminals 1 and 2 of the DSP-CAS and
when shorted there should be low resistance between the two terminals (less than 100 ohms). Repeat for
the other terminals 14 to 18.
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