Watlow PM LEGACY™ Limit Controller
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115
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Appendix
2 Digital Input/Output Option - 2 DIO
• Digital input update rate 10Hz
- DC voltage
- Max. input 36V @ 3mA
- Min. high state 3V at 0.25mA
- Max. low state 2V
- Dry contact
- Min. open resistance 10kΩ
- Max. closed resistance 50Ω
- Max. short circuit 13mA
• Digital output update rate 10Hz
- SSR drive signal
- Update rate 10 Hz
- Maximum open circuit voltage is 22 to 25
(dc)
- PNP transistor source
- Typical drive; 21mA @ 4.5V for DO5, and 11mA @ 4.5V for DO6
- Current limit 24mA for Output 5 and 12mA Output 6
- Output 5 capable of driving one 3 - pole DIN-A-MITE
- Output 6 capable of driving one 1 - pole DIN-A-MITE
Output Hardware
• Switched DC
- Maximum open circuit voltage is 22 to 25V
(dc)
- 30mA max. per single output / 40mA max. total per paired outputs (3 & 4)
- Typical drive; 4.5V
(dc) @ 30mA
- Short circuit limited to <50mA
- Use dc- and dc+ to drive external solid-state relay
- 1-pole DIN-A-MITE: up to 4 in parallel or 4 in series
- 2-pole DIN-A-MITE: up to 2 in parallel or 2 in series
- 3-pole DIN-A-MITE: up to 2 in series
• Switched dc/open collector = 30VÎ
(dc) max. @ 100mA max. current sink
• Solid State Relay (SSR), FormA, 0.5A @ 24V
(ac) min., 240VÅ
(ac) max., 1A at 50°F linear derating
to 0.5A at 149°F resistive, opto-isolated, without contact suppression, 120/240V
(ac) 20 VA pilot
duty
- Minimum holding current of 10mA
• Electromechanical relay, Form C, 5A, 24 to 240V
(ac) or 30VÎ
(dc) max., resistive load,
100,000 cycles at rated load, 125 VA pilot duty at 120/240V
(ac), 25 VA at 24V
(ac)
• Electromechanical relay, Form A, 5A, 24 to 240V
(ac) or 30V (dc) max., resistive load, 100,000
cycles at rated load, 125 VA pilot duty at 120/240V
(ac), 25 VA at 24V
(ac)
• NO-ARC relay, Form A, 15A, 24 to 240V
(ac), no V
(dc), resistive load, 2 million cycles at rated
load
