Siemens MJ-4A Installation And Operation Manual page 84

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Appendix K Terminal Strip Connections
Table K.3 below describes the connections for terminal strip P3A
Connections for Terminal Strip P3A
Table K.3
Pin Number Signal Name
1 &2 INHIB OUT+
& INHIB OUT-
3 AUXOUT C
4 AUXOUT NO
5 & 6 AUXIN+
& AUXIN-
7 MAN_STAT
8 R/M COM
9 REM_STAT
10 & 11 ICIRC+
& ICIRC-
12 P2SW
Table K.4 below describes the connections for terminal strip P3B
Table K.4 Connections for Terminal Strip P3B
Pin Number Signal Name
1 J30
2 AUXOUT NC
3 & 4 INHIB IN+
& INHIB IN-
5 & 6 VRC1+
& VRC1-
7 & 8 VRC2+
&VRC2-
9 J412
10 C8_66A
11 & 12 C & C2
80
Inhibit Out is activated (closed) whenever the MJ-4 automatic mode operation is
inhibited by either the Automatic Inhibit Input or by Communication link.
Common contact of Auxiliary Relay.
Normally-open contact of Auxiliary Relay.
Auxiliary input contact pair. For future definition.
When closed to R/M COM it indicates that the MJ-4A is in the Manual Operating
Mode. The RA/O/M switch is in the Manual position. MJ-4A ONLY
Common contact of the SPDT Remote-Automatic/Off/Manual (RA/O/M) switch.
[Use with Man_stat and Rem_stat.] MJ-4A ONLY
When closed to R/M COM it indicates that the MJ-4A is in the Remote Operating
Mode. The RA/O/M switch is in the Remote-Auto position. MJ-4A ONLY
Reserved for Circulating Current Input signal pair. (0 - 640 mA, AC.)
P2 signal after the Power Switch. Used for externally monitoring the P2 voltage sig-
nal.
Spare connection for future application.
Normally-closed contact of Auxiliary Output Relay. (See P3A-3.)
INHIB IN directly disables the MJ-4 motor control relays. Through the microproces-
sor, this signal asserts Automatic Inhibit of motor Raise/Lower operations, and acti-
vates the Auto Inhibit Indicator.
These contacts are used to activate VRC (both MJ-3A
They are also used for External Line Drop Compensation Polarity Control.
These contacts are used to activate VRC Enable 2 for MJ-X mode. They are also
used for Alternate functions: Alternate Time Delay and Low External Battery.
Alternate signal source for "External Power" if jumper J9 is removed. See Table J.1.
Reserved for future application.
C & C2 (P3B-11&12) provide access to the regulator current path for connecting
auxiliary apparatus (e.g., an external current meter.) The current ranges from 0 to
640 mA nominal, into a low impedance load.
C&C2 have redundant jumpers. As shipped from the factory, there is a jumper
across the terminal strip pins, and there is an on-board jumper "J1".
[Both the terminal strip jumper and on-board jumper (J1) need to be removed if
external equipped is connected.]
Caution: Open circuiting the C&C2 connections may damage the regulator
Current Transformer (CT). Keep C&C2 shorted unless connected to an appro-
priate external current-handling device.
Description
Description
TM
mode and MJ-X mode).
I/O / Power
Relay Output
Output
Output
Contact Closure
Input
Switch Closure
Output
Switch Closure
Output
Switch Closure
Output
Current Input
Output
I/O / Power
Relay Output
Contact closure
(Input)
Contact closure
(Input)
Contact closure
(Input)
Current
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