Range; Specifications For; Module; Setpoint Relays - HELIX GRANVILLE-PHILLIPS Convectron ATM Instruction Manual

Specifications for RS-485 version
Digital format
Protocol
Parity
Baud rate

Setpoint relays

Relays 1 and 3
Relays 2 and 4
RS–485 male I/O connector on module end panel
11–26 V power input 3
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Convectron ATM Vacuum Gauge Module Instruction Manual
American Standard Code for Information Interchange (ASCII)
RS–485, 2-wire
• 8 data bits, no parity, 1 stop bit (default)
• 7 data bits, odd parity, 1 stop bit
• 7 data bits, even parity, 1 stop bit
1200, 2400, 4800, 9600, 19200 (default), or 38400 baud
Four single-pole, single-throw (SPST) relays. Use RS–485 commands to
configure relays. Each relay can be assigned to the Convectron gauge or the
differential pressure sensor.
• In default mode, relays 1 and 3 are assigned to the Convectron gauge,
which indicates vacuum chamber pressure

• Range: 10

• In default mode, relays 2 and 4 are assigned to the differential pressure
sensor, which indicates pressure differential between atmospheric and
vacuum chamber pressures
• Range: –750 to +125 Torr
No connection 5
Power ground 4
RS–485 B line 2
RS–485 A line 1
10 Relay 1 normally open
9 Relay 4 normally open
8 RS–485 ground
7 Relay 3 common
6 Relay 3 normally open
–3
to 1000 Torr
15 Relay 1 common
14 Relay 4 common
13 No connection
12 Relay 2 common
11 Relay 2 normally open
Specifications
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