MKS UniMag 971, Operation And Installation Manual, Page: 11 / 44

971 UniMag ™ Operation manual 8
Input/Output Wiring
971 I/O Connector (15 pin)
15 pin male HD DSUB
PIN Description
1
RS485- / RS232 Transmit
2 RS485+ / RS232 Receive
3 Power + (9-30 VDC)
4 Power return -
5 Analog
6 Analog Output -
7 Relay 1, Normally Open
(1)
8 Relay 1, Common
(1)
9 Relay 1, Normally Closed
(1)
10 Relay 2, Normally Closed
(1)
11 Relay 2, Common
(1)
12 Relay 2, Normally Open
(1)
13 Cold cathode enable
(Active low)
14 Relay 3, Common
(1)
15 Relay 3, Normally Open
(1)
(1) Relays are optional (See part number page 3)
Cold cathode external control pin 13 must be floating or shorten to power supply
ground pin 4. Do not connect to a voltage source.
Connection to voltage source can cause permanent damage to the transducer.
971 I/O Connector
P/N: 971-x1090-0001
(6 pin Hirschmann)
PIN Description
1
Identification resistor (5.1KΩ)
2 Analog
3 Analog Output –
4 Power + (9-30 VDC)
5 Power return -
6 Chassis
P/N: 971-x1090-0001, will always enable the high voltage when power is turned on. Power supply
must be external controlled by switching power (pin 4) on and off to avoid continuously operation
at high pressure.
971 I/O Connector
P/N: 971-x1080-0002
P/N: 971-x1080-0003
(8 pin RJ45/FCC68)
PIN Description
1
Power + (9-30 VDC)
2 Power return -
3 Analog
4 Identification resistor
(2)
5 Analog Output -
6 Set point output (Open
collector)
7 Cold cathode enable
(Active low)
8 Not Connected
(2) Resistor value: 971-x1080-0002: 100K, 971-x1080-0002: 110K
971 RS232 connector
(6 pin Hirs
8 pin RJ45/FCC68) PIN Description
1
RS232 Transmit
2 RS232 Ground
3 RS232 Receive
4 RS232 Receive
5 RS232 Ground
6 RS232 Transmit