Control Output Connections; Jumpers; Option Port - DCS 090 Series Reference Manual

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The 'GND' terminal is the ground of the low voltage power supply and should be connected
directly to earth ground.
Fusing
The operating power input is fused for fire protection in the event of a component failure by a 1
Amp fuse F1 located near the power input tabs. This fuse is not intended for operator
replacement and should never open during normal operation. It is very unlikely that normal
operation can be restored by simply replacing F1 after it blows.
If replaced, it must be replaced with a fuse of like rating (1 Amp at 250V) for continued
protection against fire.

Control Output Connections

All control outputs of the M090 main ECB appear on the five pin header J4. The *LOAD2
output as well as +5 VDC and ground are duplicated on the three pin header JP5. This is done to
give the user the option of providing a unique cable to the auxiliary power ECB if one is present
in the system. If both power ECBs are located distant from the main ECB, it may be more
convenient to run a single cable that carries all the signals needed to run both power ECBs.
The signals on J4 and J5 are shown in the table below.
Signal
*LOAD1
+5 V
GND
RLY
*LOAD2

Jumpers

There are two contact closure inputs called option jumpers as shown in Figure 2. When the two
pins (.025" square pins spaced 0.1" apart) associated with each jumper are electrically connected
the jumper is considered closed. The result of closing a jumper varies by firmware
configuration.

Option Port

A seven pin header called J6 is used for factory testing and connecting to various options such as
RS-232.
2/21/05
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090 Series Reference Manual
Active Low TTL control signal for main triac.
Connects to *LOAD pin on power ECB.
5 volt DC operating power
system ground
Active high TTL relay control signal
Active Low TTL control signal for auxiliary triac.
Connects to *LOAD pin on power ECB
Table 3: Main ECB Control Output Connector Pinout
Digital Control Systems
Description J4 Pin # J5 Pin #
1 N/C
2 2
3 3
4 N/C
5 1
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