RATE
DPS3000 series tracks the rate of process change/minute for each channel. This rate is displayed by first pushing the CH. SEL key to select the channel whose rate is desired. Once the channel has been selected, push rate key. The display will briefly read
LIMITS
DPS3000 series units support limit alarms on all the channels. These limits can be programmed over the entire range of selected thermocouple or scale. Thus, not only can these units be used as monitors but they can also provide control capability on each channel. Limit values are programmed during CH Setup. Also programmed during CH Setup is the
OUTPUTS
DPS3000 Series units can be ordered with either open collector outputs or
Open Collector Option
Whenever a limit is reached an open collector output provides a 5 Vdc signal at 50ma. on the output connector, eg.. Limit #4 provides its 5 volt output signal between pins 7 & 8 of the card edge.
Figure 1. Open Collector Hookup Example
+5VDC
Instrument
7
8
+ OUTPUT
LOAD
- OUTPUT
Solid Sate Relay
LED, Buzzer, ETC.
Electro-Mechanical Relay Option
These relays are programmed during CH Setup to operate as either Normally Open (NO) or Normally Closed (NC). The default setting is Normally Open. Each of these limit relays provides a switched output whenever a limit is reached. The maximum rating for a 120Vac unit is 120Vac @ 0.5 amp or 28 Vdc @ 1.0 amp. A 240Vac unit is rated at 240Vac @ 0.25 amp. or 28Vdc @ 1.0 amp.
Figure 2. |
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Instrument |
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Limit # 4 | 7 |
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| Switched Output | |||
| 8 | 120 VAC @ 0.5 AMPS | ||
Limit # 3 | 5 | Switched Output | ||
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6 | 120 VAC @ 0.5 AMPS | |||
| 3 | Switched Output | ||
Limit # 2 |
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4 | 120 VAC @ 0.5 AMPS | |||
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| 1 |
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| Switched Output | ||
Limit # 1 | 2 | 120 VAC @ 0.5 AMPS | ||
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LIMIT RELAYS |
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| Page 20 | |
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